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Daniels Electronics Ltd.Victoria, BC

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Copyright © 2006 Daniels Electronics Ltd. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of Daniels Electronics Ltd.

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Covers Models:All VHF FM TransmittersAll UHF FM Transmitters With:Version 2.3 FM Audio Processor

MT-3 FM TRANSMITTERMAIN BOARDINSTRUCTION MANUAL

IM20-MT3TXMN4-5-0Feb 2006

ii

FM Transmitter Main BoardIM20-MT3TXMN

This document has been produced, verified and controlled in accordance with Daniels Electronics’ Quality Management System requirements.

Please report any errors or problems to Daniels Electronics’ Customer Service Department.

The user’s authority to operate this equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd.

The design of this equipment is subject to change due to continuous development. This equipment may incorporate minor changes in detail from the information contained in this manual.

DOCUMENT CONTROL

NOTE

Daniels Electronics Ltd. utilizes a three-level revision system. This system enables Daniels to identify the significance of a revision. Each element of the revision number signifies the scope of change as described in the diagram below.

DOCUMENT REVISION DEFINITION

Major Revisions: The result of a major change to product function, process or

requirements.

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1-0-0

Three-level revision numbers start at 1-0-0 for the first release. The appropriate element of the revision number is incremented by 1 for each subsequent revision, causing any digits to the right to be reset to 0.

For example:If the current revision = 2-1-1 Then the next major revision = 3-0-0If the current revision = 4-3-1 Then the next minor revision = 4-4-0If the current revision = 3-2-2 Then the next editorial revision = 3-2-3

The complete revision history is provided at the back of the document.

iii

FM Transmitter Main Board IM20-MT3TXMN

ContentsGeneral Information ...............................................................1

Performance Specifications .......................................................................2

Theory of Operation ...............................................................3Transmitter Main Board .............................................................................3Audio Processor ....................................................................................... 10

Transmitter Alignment .......................................................... 21Repair Note .............................................................................................. 21Recommended Test Equipment List ........................................................ 22General .................................................................................................... 22Standard Factory Settings and Jumper Configuration ............................. 23Audio Processor Alignment ...................................................................... 24Transmitters with Pre-Emphasis and CTCSS Subtone ............................ 25Transmitters with Flat Audio ..................................................................... 27Troubleshooting ....................................................................................... 29Temperature Compensation ..................................................................... 30

Interconnect Pin Definitions and Jumper Configurations ..... 31Interconnection Pin Definitions ................................................................ 31Audio Processor Jumper Tables .............................................................. 33

Illustrations and Schematics ................................................ 37Transmitter Block Diagram ....................................................................... 38Transmitter Main Board Component Layout - Top ................................... 39Transmitter Main Board Component Layout - Bottom .............................. 40Transmitter Main Board Schematic Diagram ........................................... 41Front Panel Board Component Layout .................................................... 42Front Panel Board Schematic Diagram ................................................... 42Audio Processor Board Component Layout ............................................. 43Audio Processor Board Schematic Diagram ........................................... 44

Parts List .............................................................................. 45Transmitter Main Board Electrical Parts List ............................................ 45Audio Processor Electrical Parts List ....................................................... 48Front Panel Board Electrical Parts List .................................................... 51

Revision History ................................................................... 53

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1


GENERAL INFORMATION

IntroductionThe MT-3 Transmitter Main Board integrates the MT-3 Front Panel Board, MT-3 Audio Processor, Synthesizer (Low Current OS-3 or Enhanced OS-3H) module, and Amplifier module together to comprise a MT-3 series transmitter. The Front Panel Board and the Audio Processor are soldered directly to the Transmitter Main Board while the Amplifier and the Synthesizer modules are frequency band sensitive, plug-in modules. Circuitry and jumpers on the Transmitter Main Board control the operation of the modules as well as the overall operation of the MT-3 transmitter. Power and signal connections are made through the 48 pin type ‘F’ connector on the rear of the Transmitter Main Board where they are then routed to the other MT-3 modules. The transmitter enclosure is formed by the front panel face plate and aluminum shell attached to the transmitter main board and the rear panel plate attached to the aluminum shell.

General Information2


PERFORMANCE SPECIFICATIONSGeneral SpecificationsParameter Specification

Type: MT-3 Series Transmitter

Compatibility: MT-3 Series Amplifier, OS-3 and OS-3H Frequency Synthesizer Modules

Modulation: 11K0F3E or 16K0F3E (Frequency Modulation)

Operating Temperature: -30˚C to +60˚C, optional -40˚C to +60˚C

Operating Humidity: 95% RH (non-condensing) at +25°C

Operating Voltage: +9.5VDC Regulated. +13.8VDC Nominal (11 - 16VDC)

Front Panel Controls: NORM (repeat mode), OFF, and KEY TX (TX on)

PTT Activation: • Active to ground with or without time-out-timer. • Microphone activated with or without time-out-timer. • Front Panel switch: KEY TX - without time-out-timer. • NORM - with or without time-out-timer. • Isolated (optional relay) with or without time-out-timer.

PTT Time-Out-Timer: Selectable from 1sec to 8hrs (Factory Default: 5 min)

Audio SpecificationsParameter Specification

Audio Input & Impedance: Balanced 600Ω or unbalanced (optional)

Audio Input Level: -25dBm to 0dBm.

Audio Frequency Response: 6dB per octave, 1kHz reference deviation(Pre-emphasis) Complies with T1A-603-B (Section 3.2.6)

Audio Frequency Response: 1kHz reference deviation(Flat) +1 to -1dB (300 to 2000Hz)

0 to -2dB (2.5kHz) -1 to -3dB (2.8kHz) -2 to -4dB (3.0kHz)

Audio Deviation: Preset to ±1.5kHz (NB) or ±3.0kHz (WB) with a 1kHz tone (capable ±2.5kHz or ±5.0kHz)

Subtone Audio Input 1: 0.5 Vpp at 200Hz for ±500Hz deviation (intern adjust)

Subtone Audio Input 1 Frequency Range: 60Hz to 300Hz

Subtone Audio Input 2: 0.5Vpp at 100Hz for ±500Hz deviation (intern adjust)

Subtone Audio Input 2 Frequency Range: DC to 150Hz

Direct Modulation Input: 0.5Vrms at 1kHz or ±3kHz deviation

Direct Modulation Frequency Range: DC to 5kHz

3


THEORY OF OPERATION

TRANSMITTER MAIN BOARD GeneralSwitch SW1 on the Front Panel Board is a DPDT switch that controls the operation of the transmitter . When SW1 is in the ‘OFF’ position the transmitter is turned off; however, +13.8VDC is still present on the Transmitter Main Board as the +13.8VDC supply is not switched. When SW1 is in the ‘KEYED’ position, +9.5VDC is supplied to the transmitter circuitry and the transmitter is continuously keyed on. When SW1 is in the ‘NORM’ position, +9.5VDC is supplied to the transmitter circuitry and the transmitter can be keyed from any of the several Push-To-Talk inputs.

Theory of Operation4


Transmitter Push-To-TalkAll three of the Push-To-Talk (PTT) inputs that key the transmitter are active low (< +2VDC). One PTT input is on the front panel microphone connector. The other two PTT inputs: PTT WTO (PTT With Time-Out-Timer) and PTT NTO (PTT No Time-Out-Timer), are on the backplane connector of the transmitter board. If required, the microphone’s PTT input can be configured to activate the transmitter’s Time-Out-Timer (TOT). An isolated PTT input can be made available by installing an optional relay (RELAY1) and configuring jumpers J1 to J4 so that the relay controls the PTT circuitry.

Microphone PTT

Jumper J1 on the MT-3 Front Panel Board configures the microphone’s PTT input (MIC PTT) to either bypass or activate the transmitter’s TOT. Installing surface mount jumper J1 in the ‘X’ position (default) selects the MIC PTT NTO line, which bypasses the TOT. Installing surface mount jumper J1 to the ‘Y’ position selects the MIC PTT WTO line, which activates the transmitter’s TOT. When SW1 is in the ‘KEYED’ position the MIC PTT NTO line is automatically grounded.

PTT With Time-Out-Timer

Pins B10 and Z10 of the backplane connector are the PTT WTO input. When the PTT WTO signal, which is normally high, falls below +2.0VDC, the transmitter is keyed. The transmitter is disabled when the PTT WTO input rises above +2.3VDC or if the TOT’s time-out period is exceeded. If the time-out period is exceeded the PTT WTO input must go high (>+2.3VDC) and then low again in order to re-key the transmitter.

The PTT WTO threshold of approximately +2VDC (0.3VDC hysteresis) is set by U1a, R1, R2, R3, R4, R9, and R10 while diodes D1 and D2 provide overvoltage protection for U1a. The PTT WTO signal output from U1a is ‘AND’ed with the MIC PTT WTO by U2a. When either the PTT WTO or the MIC PTT WTO is activated the output of U2a goes low which triggers the transmitter’s TOT located on the MT-3 Audio Processor. The TOT’s output is ‘AND’ed with the MIC PTT NTO signal (U2c) and the PTT NTO signal (U2d).

When any one of the preceding three signals (TOT’s output, MIC PTT NTO, PTT NTO) go low the transmitter is activated by transistors Q1 to Q7 which switch power to the various modules.

PTT No Time-Out-Timer

Pins B14 and Z14 of the backplane connector are the PTT NTO input. When the PTT NTO signal, which is normally high, falls below +2.0VDC, the transmitter is keyed. As long as the PTT NTO signal remains below +2.0VDC the transmitter will remain keyed. The transmitter is disabled when the PTT NTO signal rises above +2.3VDC.

The PTT NTO threshold of approximately +2VDC (0.3VDC hysteresis) is set by U1b, R5, R6, R7, R8, R9, and R10 while diodes D3 and D4 provide overvoltage protection for U1b. The PTT NTO signal is ‘AND’ed with the output of U2c (MIC PTT NTO signal ‘AND’ed with the TOT output) by U2d. When the output of U2d goes low transistors Q1 to Q7 activate the transmitter, which switch power to the various modules.

PTT Relay

The transmitter’s PTT circuitry can be completely isolated by installing RELAY1. Jumpers J1 to J5 configure the relay to provide an isolated PTT input for either the PTT WTO line or PTT NTO line. Energizing the relay enables the isolated PTT input. The transmitter board will accept any of the Aromat TF2E line relays. These relays are DPDT, single side stable, and have coil voltages ranging from +3VDC to +48VDC. Only one set of relay contacts is used to activate the PTT circuitry.

To configure the isolated input for PTT WTO operation jumpers J2, J3, and J4 must be in the ‘Y’ position. In this mode, pins B10 and Z10 no longer function as the PTT WTO input; however, pins B14 and Z14 continue to function as the normal PTT NTO input.

To configure the isolated input for PTT NTO operation jumpers J2, J3, and J4, must be in the ‘X’ position. In this mode, pins B14 and Z14 no longer function as the PTT NTO input; however, pins B10 and Z10 continue to function as the normal PTT WTO input.

Theory of Operation 5


PTT Output

Pin B24 on the backplane connector is an open drain output (Q9), which is pulled low anytime the transmitter is keyed and the synthesizer is locked. An N-channel MOSFET Q9 is capable of sinking currents up to 2 Amps and is activated by Q8, which is activated by the Qualified PTT signal (JS2-6) of the Synthesizer module. The Qualified PTT signal also controls the LED ENA line for diode D1 on the front panel board and enable line for the MT-3 Amplifier Module (JP1-1).

PTT Voltage Switching

The PTT voltage switching circuitry is comprised of transistors Q1 through Q7 and the associated resistors. The base of Q1 is driven by the output of U2d, which is the combined PTT signal from all of the PTT inputs. When the transmitter is keyed, Q1 is turned off and subsequently transistors Q3, Q4, and Q6 are turned on. Transistors Q3, Q4, and Q6 provide three separate functions:

Q3 Provides the active low signal for the Synthesizer module PTT input.

Q4 Turns on Q5, which turns on the +9.5VDC Switched supply.

Q6 Turns on Q7, which turns on the +9.5VDC PTT Switched supply.

The ‘+9.5VDC Switched’ supply (Q5) can also be activated by installing jumper J6 or by externally grounding the TX Standby Line (pins B12 and Z12). The ‘+9.5VDC PTT Switched’ supply and the ‘+9.5VDC Switched’ supply both provide +9.5VDC but depending on how jumpers J6, J7 and J18 are configured the transmitter’s standby mode will change.

MT-3 Front Panel BoardThe MT-3 Front Panel Board is attached to the MT-3 Transmitter Board and is used to mount the front panel switch, diode, and microphone connector. The main purpose of the board is to eliminate a wiring harness for the front panel components. Jumper J1, located on the rear of the circuit board, is used to select whether or not the MIC PTT line activates the transmitter’s TOT. Jumper J2 is used to select whether or not Rx Audio or 13.8 Volt is supplied to pin 4 of the microphone.

J1 ‘X’ position MIC PTT NTO - no time-out timer (factory setting) ‘Y’ position MIC PTT WTO with time-out-timer

J2 ‘X’ position Rx Audio enabled to MIC-4 pin (factory setting) ‘Y’ position +13.8 Volts supplied to MIC-4 pin



Transmitter Standby ModesThe MT-3 series transmitters have 8 different standby modes that trade-off standby current consumption for start-up speed. Three jumpers are found on the Transmitter Main Board:

J6 Continuously enables the ‘+9.5VDC Switched’ supply.

J7 Selects the power source for the MT-3 FM Audio Processor.

J18 Selects the enable line for the OS-3 or OS-3H Synthesizer module.

Additionally, there is a jumper on the FM Audio Processor Board:

JU36 Determines the power source for the dual compression amplifiers.

If JU36 is not installed on the FM Audio Processor, both microphone and balanced audio compression amplifiers will be disabled, eliminating the use of the front panel microphone jack for local microphone operations. With this configuration, the balanced audio is routed around the compression circuitry via JU11 (installed) with JU1 and JU2 removed.

Mode Condition Table

Mode # J6 J7 J18Synthesizer/ Osc. State

Audio Processor State (8V Switched)

Audio Processor Compression JU36

1a OUT Y Y PTT Switched PTT Switched Switched +8.0V(X)1b OUT Y Y PTT Switched PTT Switched Continuous 9.5V(Y)1c OUT Y Y PTT Switched PTT Switched Disabled (Not Installed)2a IN Y X Always enabled PTT Switched Switched +8.0V (X)2b IN Y X Always enabled PTT Switched Continuous 9.5V (Y)2c IN Y X Always enabled PTT Switched Disabled (Not Installed)3 IN X Y PTT Switched Always enabled Doesn’t matter4 IN X X Always enabled Always enabled Doesn’t matter



The actual current and start-up time depend on the oscillator source and amplifier module. The current and start-up times given below are representative values intended only as guidelines. Refer to the appropriate modular instruction manuals for specific oscillator and amplifier types for further information.

Standby Mode Selection Table

Mode # Standby Current Turn-on Time1a 14mA 150mS1b 21mA 10mS1c 14mA 10mS2a 166mA 150mS2b 173mA 10mS2c 167mA 10mS3 29mA 10mS4 181mA 10mS

Note: Standby Current is the total current drawn by the Synthesizer and Audio Processor from the +9.5VDC supply.

FM Audio Processor Total Current Consumption

Compression Configuration

Audio Processor Current Draw keyed / unkeyed

Compression enabled (JU36X) 15mA / 0.45mACompression and microphone disabled (JU36 Open)

9.2mA / 0.45mA

Compression enabled (JU36Y) 15mA / 9.2mA

Audio Circuits

The MT-3 Audio Processor performs audio signal conditioning (e.g. limiting, filtering, and pre-emphasis). The transmitter board routes the audio lines from the backplane connector to the audio processor and then to the synthesizer. The audio lines routed to the audio processor are two subtone inputs (backplane pins B22 and Z24), a direct modulation input (pin Z28), a squelched/flat audio input (pin Z20), a 600Ω balanced input (pins B18 and Z18), and an audio control line (pin Z22). The audio processor’s balanced input pins are isolated from pins B18 and Z18 by a transformer (T1).

Two audio outputs from the MT-3 Audio Processor are routed to the synthesizer modules.

Microphone Audio

Normally the microphone audio is sent from the attached transmitter, however the MIC IN and MIC OUT lines can be configured on the Transmitter Main Board such that the microphone audio modulates a different transmitter. The configuration of the MIC IN (pin Z4) and MIC OUT (pin B4) lines on the MT-3 Transmitter Main Board are controlled by jumpers J16 and J17 respectively. Jumper J16 selects the audio source for the MT-3 Audio Processor’s microphone input. Jumper J17 is used to enable or disable the MIC OUT line. Normally the transmitter’s microphone is selected (J16 in the ‘X’ position) and the MIC OUT line is enabled (J17 is installed).

Received Audio

Pin B20 is the audio input from the transmitter’s corresponding receiver. The default setting for this line is to have it AC coupled (Jumper J9 is out) and directly connected to the front panel board RX AUDIO line.

Channel SelectionSynthesized Transmitter

Seven backplane connections are used to communicate with the synthesizer unit. Pins D28, D30, and D32 are used (in house) to program the synthesizer. Channel select lines CSEL 0 (least significant bit) through CSEL 3 (most significant bit), which are available at pins D20, D22, D24, and D26, are used once the synthesizer is programmed to select one of 16 channels. If the channel select lines are all low (channel 1) the channel for the synthesizer is read from switches FSW1 (most significant), FSW2, FSW3, and FSW4 (least significant); otherwise one of 15 pre-programmed frequencies is selected. Since the resulting frequency is dependent on the transmitter model, refer to the section on frequency selection in the Transmitter Manual or to the channel designation tables for that particular transmitter.



Amplifier CircuitsThe MT-3 series Amplifier has 6 connections that are cabled to the transmitter board: +13.8VDC, +9.5VDC, Enable, Forward Power Sense, Reverse Power Sense, and Ground. The +13.8VDC supply (JP1-3) is always on while the +9.5VDC supply (JP1-2) is always switched by a PTT signal. The enable line (JP1-1) is active low and is controlled by the Qualified PTT signal from the synthesizer module module.

Jumpers J12, J13, J14, and J15 are used to configure the amplifier’s forward and reverse power sense lines (JP1-4 and JP1-5). Normally jumpers J13, J14, and J15 are in the ‘X’ position, which directly connects the amplifier’s forward, and reverse power sense lines to the backplane connector (pins B26 and Z26 respectively). The forward and reverse power sense lines from the Amplifier can be open collector or linear outputs depending on how they are configured in the amplifier module. In open collector configuration the lines are active low, that is, the output will go low when a ‘fail’ condition is detected. If both lines from the amplifier module are configured as open collector outputs, the power sense lines can be ‘OR’ed together to make a general fail indicator (jumper J12 in, jumpers J13, J14, and J15 in the ‘Y’ position). The Fail Indicator is also an open collector output; however, the Fail Indicator is active high (the output goes high when a ‘fail’ condition is detected). When the transmitter is configured with the general fail indicator option, pin Z26 (VSWR reverse) is not used and pin B26 becomes the Fail Indicator output.



Time-Out-Timer CircuitryThe MT-3 Transmitter also has an associated programmable push-to-talk (PTT) time-out-timer (TOT) circuitry on the Transmitter Main Board. The TOT circuitry is powered via J34 from the continuous +9.5VDC supply and is programmable for various time-out periods.

The TOT input trigger (enabled by J33) is normally high and in this state the timer is disabled. When the input trigger level falls below +2.0VDC, the timer is activated, the TOT output trigger (enable by J35) is pulled low, and the transmitter is keyed. If the input trigger rises above +2.4VDC or if the time-out period is exceeded, the output trigger will go high, disabling the transmitter. If the time-out period is exceeded, the TOT input trigger must go high and then low again in order to re-key the transmitter.

The time-out duration is jumper selectable from 1 second to 8 hours. The positions of the jumpers are on the top (Through hole component) side of the Transmitter Main Board.

J32 J31 J29 J28 J26 J27 I I I I I I 0.01 I I I I I N/I 0.01 I I I I N/I I 0.01 I I I N/I I I 0.01 I I I N/I I N/I 0.02 I I N/I I I I 0.02 I I I N/I N/I I 0.03 I I N/I I I N/I 0.04 I I N/I N/I I I 0.05 I I N/I I N/I I 0.06 I I N/I N/I I N/I 0.08 I N/I I I I I 0.10 I I N/I N/I N/I I 0.12 I N/I I I I N/I 0.15 I N/I I N/I I I 0.19 I N/I I I N/I I 0.23 I N/I I N/I I N/I 0.31 I N/I N/I I I I 0.38 I N/I I N/I N/I I 0.47 I N/I N/I I I N/I 0.62 I N/I N/I N/I I I 0.75 I N/I N/I I N/I I 0.94 I N/I N/I N/I I N/I 1.25 N/I I I I I I 1.5 I N/I N/I N/I N/I I 1.88 N/I I I I I N/I 2.5 N/I I I N/I I I 3.0 N/I I I I N/I I 3.75 N/I I I N/I I N/I 5.0 N/I I N/I I I I 6.0 N/I I I N/I N/I I 7.5 N/I I N/I I I N/I 10 N/I I N/I N/I I I 12 N/I I N/I I N/I I 15 N/I I N/I N/I I N/I 20 N/I N/I I I I I 24 N/I I N/I N/I N/I I 30 N/I N/I I I I N/I 40 N/I N/I I N/I I I 48 N/I N/I I I N/I I 60 N/I N/I I N/I I N/I 80 N/I N/I N/I I I I 96 N/I N/I I N/I N/I I 120 N/I N/I N/I I I N/I 160 N/I N/I N/I N/I I I 192 N/I N/I N/I I N/I I 240 N/I N/I N/I N/I I N/I 320 N/I N/I N/I N/I N/I I 480

N/I = Not InstalledI = InstalledBold text represents default settings.



AUDIO PROCESSOR

IntroductionThe MT-3 FM Audio Processor is a versatile circuit board that can provide several types of audio processing for voice or data transmission.

Bandwidth Table

Term Channel SpacingRated System Deviation

Wideband (WB) 25kHz or 30kHz ±5.00kHz Narrowband (NB) 12.5kHz or 15kHz ±2.50kHz

Features include:

• Automatic level control using a compression amplifier with a 25 dB dynamic range.

• Limiter and Splatter filter that removes noise and harmonics.

• Selectable pre-emphasis or flat audio response.

• Temperature compensated audio output.

• Ability to transmit data and voice switched by a single control line.

• Backwards compatible with Daniels Electronics MT-2 series transmitters.

• Multiple jumpers that can be configured to allow maximum flexibility in routing signals from inputs to outputs, and disabling selected circuits to reduce operating current.

• Dual microphone and balanced audio compression circuits.

• On-board multi-configurable temperature compensation to correct for changes in transmitter deviation over temperature caused by changing characteristics of synthesizers and oscillators.

• A single chip 10th Order Linear Phase Low pass splatter filter for increased cutoff attenuation responses needed in today’s narrow band environment

• The ability to switch between narrow and wideband through a single control line, which can be externally controlled. This can be useful when configured as a multi-channel transmitter, which uses mixed wide and narrowband frequencies.

• The ability to easily reconfigure fixed operations from narrow to wideband through simple jumper settings.

• Separate voice and direct modulation outputs, each individually configurable.

• Direct modulation input for LTR™, DCS, paging and other digital modulations that require very low frequency modulation to the synthesizer module.

• Multiple audio inputs for various audio filter or modulation configurations.

Note: If dual mode CTCSS and LTR™/DCS is desired in the same transmitter may be possible with dual port modulation synthesizers. It is not feasible with single port modulation synthesizers. These synthesizers are characterized by the lack of a modulation port in their VCO circuit. This is covered in the Applications Manual AM10-DMS, Data Modulation and Signaling Applications Manual. It is recommended that the Factory be contacted for further details.

A continuous +9.5VDC supply and a switched +8.0VDC supply are required to power the module which is normally supplied by the Main Transmitter Board.

The Audio Processor’s balanced input pins are isolated by a transformer (T1) on the Transmitter Main Board. Two audio outputs from the MT-3 Audio Processor are routed to the Synthesizer Module.



SplatterFilter

Pre-emphasis

Select

Pre-emphasis

Select

CompressionAmp

CompressionAmp

Limiter/SummingAmplifier

Buffer

+4VRegulator

+4V

Pre-emphasis

Select

AuxillaryBufferAmp

Tx AudioControl

AudioSwitch 1

AudioSwitch 2

Regular ModulationBuffer

Subtone1

3 KHz

Direct ModulationOffset Buffer

TCVCXOModulation Buffer

Offset

TCVCXODC Level

Adjust

Reg ModOut

Low FreqOut

Inverting Amp

CouplingSelect

2 PortPolaritySelect

JU35

JU34

Tx AudioControl

Wide/NarrowBand SelectData/Voice

Select

3dBNarrowBandPad

JU14

JU26

JU27

JU30

JU43

JU28

JU25

49K9

49K9

P1-3

R2

U1A

U1B

P1-1

R31

ToneDigitalInput

P2-1

BalancedInput

MicrophoneInput

U3A

U3B

U2A

U2C

U2D

P2-2

R48

R42

U5

U6

Q1

DirectModulationInput

P4-3U2B

R87

P4-4

P4-2

P3-1

U3C

U3D

P4-1JU4

Subtone2 JU13

R36

JU12

JU11

*

Audio Processor Block Diagram



Interconnection Pin Layout Diagram

PCB

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

P1P2P4P3

Balanced Input

END VIEW

Mic Input

Subtone Inp ut 1

+8V

+9.5V

Low Frequency Direct Mod Output

VoiceAnd Subtone

Output -8 dBm

-10 dBm

-18 dBm

Surface Mount Side

0 dBm

B0312

Factory ConfigurationThe MT-3 FM Audio Processor is factory configured as follows:

Parameter Specification

Maximum Deviation • ±2.5kHz (Narrowband), • ±5.0kHz (Wideband).

Microphone Input • 1kHz signal at -10dBm gives ±60% rated system deviation • 1kHz signal compression set at ±84% rated system deviation

Audio Balanced Input • 1kHz tone at -8dBm gives pre-emphasis response ±60% rated system deviation • 1kHz signal compression set at ±84% rated system deviation

Subtone Input 1 • 100Hz tone at -18dBm gives ±500Hz (Wideband) • ±350Hz (Narrowband) deviation

All other audio inputs • Disabled



Turn on TimeThe “turn-on time” is the time it takes the FM Audio Processor to output a stable audio signal to P3-1 once the +8.0VDC power is enabled. The turn-on time can be virtually eliminated by configuring the FM Audio Processor for continuous audio standby. However this results in increased current consumption. Powering of the compression amplifier contributes to most of the time delay. So transmitters configured with the compression amplifier disabled (for data or non-compressed audio) will exhibit the fast turn-on time. The response measurement is made with the standard factory settings with a 1kHz tone applied to the balanced input.

Low Frequency ModulationThe transmitter has an additional option to address low frequency user modulation requirements. A phase modulated bandwidth from 0 (DC) to 100Hz (PLL loop filter bandwidth) allows specialized applications such as paging or trunking where a separate low frequency digital/analog modulation channel is required. Low Frequency Modulation allows external access to the low frequency modulation capabilities of the synthesizer module. The DIRECT MODULATION inputs on the J1 control connector of the M-3 motherboard will be used (B20 for TX A, and A20 for TX B). Refer to “Data Modulation and Signalling Applications Manual”, AM10-DMS for specific FM Audio Processor configuration methods.

Turn on Time

Mode Turn on time Audio Processor Standby CurrentFast turn on – higher current Approx 1mS 15mACurrent save – slower response Approx 150mS 450µA

Audio Processor SignalsThe MT-3 FM Audio Processor has six audio inputs, two audio outputs and one audio control input. Five of the audio inputs are used primarily for voice and tone signals. The sixth, the Direct modulation input, is used primarily for data signals. The audio control input is used to switch audio outputs so the transmitter can transmit voice or data.

The audio inputs on the FM Audio Processor are:

• Dynamic microphone input

• 600Ω balanced input

• Subtone inputs

• Auxiliary input.

• Direct modulation input for data signals.

FM Audio Processor Outputs

Both the audio outputs, Modulation Output (P3-1) and Low Frequency / Direct Modulation Output (P4-2), are gated by audio switches U5 and U6 respectively which are controlled by the Transmit Audio Control Input (P4-4). The audio switches can be operated complimentary to each other so that only one source modulates the transmitter. In standard configuration, the Modulation Output port is used so switch U5 is always on.



Audio Processor Modulation Outputs

The Modulation Output port is used by all voice input signals. The voice inputs are passed to U1A and U1B, a dual programmable compressor - expander that is configured as an automatic level control amplifier. Op-amp U3A provides the limiting action for the FM Audio Processor. After the audio signals have been combined, limited and buffered, they are filtered by a 10th order Linear Phase Low pass Filter (U4). The output signal from the filter is then level adjusted by the deviation control pot, R29, at the input of buffer amplifier U3D. In special applications, jumper JU6 can be disabled and JU7 enabled allowing the transmitter to be modulated directly from the auxiliary input. External filtering may be required since jumper JU7 bypasses the limiting and filter circuits.

The Low Frequency / Direct Modulation Output port has two functions depending on whether the transmitter is synthesized. In a synthesized transmitter, this port is used to modulate the synthesizer reference frequency. The frequency response of this port is typically DC to 300Hz.

Audio Processor Microphone Input

The microphone input has an automatically level controlled (ALC) preamplifier U1 whose input level is controlled by R2. The microphone input level control (R2) can accommodate a -25dBm to 0dBm input signal. The microphone input is limited and filtered and is output at the standard modulation output port. The microphone input can have a standard 6dB/octave pre-emphasis response or a flat-audio response, jumper JU1 at ‘Y’ and ‘X’ position respectively.

Audio Processor Balanced Input

The 600-Ω balanced input uses the ALC preamplifier U1B, with input level control pot (R31). The balanced input level control can accommodate a -25dBm to 0dBm input. (install JU17 when using the lower input levels). Like the microphone input, the balanced input is limited and filtered and is output at the standard modulation output port.

If no compression is required (i.e.: customer is providing their own), JU11 can be enabled providing a path through R48 (Auxiliary Input Level Control) to amplifier U2C where pre-emphasis or flat audio can then be selected from its output.

Audio Processor Auxiliary Input

The auxiliary input is a special input and does not have an ALC. This input can be configured for a pre-emphasis response (enable JU9Y) or a flat-audio response (enable JU9X). The level for this input is set by R48. The auxiliary output is normally summed with the voice signals by op-amp U3A, limited, then filtered and output at the standard modulation output port. The value of R57 (Select) can be tailored for specific applications.

When jumper JU6 is disabled and jumper JU7 is enabled, the auxiliary input can be used to directly modulate the transmitter. Care should be taken when directly modulating the transmitter with the auxiliary input because the MT-3 transmitters use direct FM modulation and there is no filtering or limiting action provided by the auxiliary input. The input level to the auxiliary input should be -18dBm and can be driven by one of three inputs:

• The balanced input – JU11.

• The tone/digital input – JU12 X or Y enabled.

• The direct modulation input – through JU28.

When the 600Ω balanced input is connected to the auxiliary input, the balanced input level control can be used to adjust the level for the auxiliary input.



Audio Processor Subtone Inputs

There are two subtone inputs available on the FM Audio Processor. Both subtone inputs can be individually configured to be output from the standard Modulation Output port or to be output from the Low Frequency / Direct Modulation Output. In standard configuration, Subtone 1 is summed with the voice signals to be output from the standard Modulation Output port while Subtone 2 is used for DCS. Both subtone inputs have an input level control.

In order to maintain a uniform frequency response from 50Hz to 300Hz, dual-port modulation techniques are used when the FM Audio Processor is used with an enhanced UHF and VHF synthesized transmitter (Synthesizer: OST-3H418, OST-3H460, OST-3H141, OST-3H162). Refer to the schematic diagrams and alignment procedures.

Direct Modulation Input

The Direct Modulation Input is an extremely versatile input. This port is designed to be used for data signals. Depending on the application, the signal can be amplified, AC or DC coupled and output to the Modulation Output or the Low Frequency / Direct Modulation Output port. Please consult the factory for specific jumper settings for your application.



Audio Processor Signal Paths (Version 2.3)

BALANCEDINPUT LEVELCONTROL

FLAT AUDIO

PRE-EMPHASISMICROPHONE INPUTLEVEL CONTROL

BALANCED INPUT

hi gh = voi cel ow = dat a

X

Y

+9.5V CONTINUOUS

NOT INSTALLED FOR DIGITAL MOD.

AUXILIARY INPUTLEVEL CONTROL

X Y

MICROPHONE AGC PREAMP

BALANCED AGC PREAMP

hi gh = w i deband sel ect

X

Y

BALANCEDCOMPRESSIONCONTROL

FLAT AUDIO

PRE-EMPHASIS

MICROPHONECOMPRESSIONCONTROL

X

Y

X

Y

X

Y

FLAT AUDIO

PRE-EMPHASIS

X

Y

TWO PORT POLARITY

SUBTONE 1 INPUTCONTROL LEVEL

3P1

2P1

1P1

4P1

3P3

3P2

1P2

4

P2+9.5V CONTINUOUS

C1010nF

4K53R46

C510nF

1

23

R25K0

FB1

+8.0V SWD

+8.0V SWD

1

2

3

JU5

47uFC13

3

2

1

100K0R48

680nFC7

4.7uFC8

TP3

SELR57

N/I (22nF)C32

Rect In

Var G

Rect Cap

Output

Inv In

R3

THDTrim

15

14

16

10

12

11

9

U1SA571D

a

680nFC42

TP12

4.7uFC26

Vcc

Rect In

Var G

Rect Cap

Output

Inv In

R3

THDTrim

GND

2

3

1

7

5

6

8

13

4

SA571DU1b

2P2

JU16

9

108

U2MC33174

c

R74N/I

R73N/I

13

1214

U2MC33174

d

4.0V

TP6

R4311K8

C39680nF

3

2

1

5K0R42

C351.0uF

C11.0uF

C91.0uF

C301.0uF

R8210K0

C373.3nF

R4916k2

C1410nF

4.0V

R7616k2

C161.0uF

JU33C511.0uF

1

2

3

JU12

R3915K4R41

137K

R5920K0

R6215K4

R51M00

C251.0uF

R6018K2R61

18K2

R82K21

R949K9

R418K2R6

18K2

330nFC36

C153.3nF

R72K21

R1049K9330nF

C19

C21.0uF

R5110K0

2

1

3

JU1

2

1

3

JU2

JU11

TP11

TP4

JU10

R52100K

R65100K

C383.3nF

R112K21

R4049K9

2

1

3JU14

1

23

R315K0

R30604R

TP2

0R0R1

R64100K

R560R0

C41.0uF

231

JU36

JU17

1

2

3JU9

1

23

5K0R63

3

21

5K0R38

MICROPHONE INPUT

SUBTONE INPUT 1

TONE/DIGITAL I/P

Microphone and Balanced Input Circuitry, V2.3 Audio Processor

B0313

Voice band audio normally enters the Balanced Input at P1-1 and P1-2 on the subrack connector while microphone audio enters at P1-3. Potentiometer R31 sets the Balanced compression level of U1B while R2 sets the microphone compression level of U1A.

Each amplifier has a dynamic range of 25 dB. Jumper JU17 is only installed when using very low input levels (-18 to –25dBm) and allows better tuning range for R31. The output of the compression amplifiers are normally set for Pre-emphasis (6dB/Octave) but can be set for a flat audio response using jumpers JU1 and JU2.



The microphone and balanced audio signals are summed and limited by U3A. Op-amp U3B provides audio level temperature compensation (for synthesizer sensitivity variations). Due to the many different characteristics of various synthesizers, many components are selected for best performance over the temperature range.

The audio is then filtered by a 10th order linear phase low pass splatter filter. This is to provide the linearity and cutoff attenuation response required for narrow band operation and digital applications.

XY

X

Y

X

Y

10 POLE LOWPASS FI LTER

LIMITER TEMPERATURECOMPENSATION

2 13

JU22

R16100K

C1710nF C49

10nF

+8.0V SWD

JU6

C504.7uF

JU7

SELR23

N/IR24

SELR25

N/IR26

SELR28

SELR17

SELR18

SELR20

In+

In-

Gnd

V-

Vout

V+

Rx

Div/Clk

1

2

3

4

8

7

6

5

U4LTC1569-6

R6622K1

R6730K9

R683K48

R692K00

+8.0V SWDP11

P12

P9 P10

2

34

1

11

U3MC33174

a

6

57

U3MC33174

b

1 2

R19SEL

1 2SELR27

12

C211.0uF

12

C61.0uF

4.0V4.0V

+8.0V SWD

TP5

R8410K0

R8510K0

TP10

1 2

150pFC43 TP14

1

2

3

JU24

1

2

3

JU3

Limiter and Splatter Filter, V2.3 Audio Processor

B0314

The filter output level is set by R29, the deviation control. From this point, the signal goes to U5 a bilateral audio switch. U5 is normally configured to be always on. The output of U5 goes to the final buffer amplifier U3D. Installing JU23 lowers the audio level by one half facilitating a quick conversion of a wideband transmitter for narrowband operation. The output of U3D has many capacitors with values selected depending on the installed synthesizer module type.



If no compression circuitry is required, the balanced input signals can be routed around the compression circuitry using jumper JU11. Op-amp U2C then provides buffering and amplification. Pre-emphasis filtering at the output is enabled or disabled using jumper JU9. The audio signal is then normally routed to U3A, the summing amplifier/limiter and processed as indicated previously.

Note however, if compression is bypassed, the THD may be higher due to the reduced dynamic input range causing more clipping. “Key down” current consumption can be reduced by 9mA by disconnecting the compression amplifier power by removing JU36, however the microphone circuit will be disabled.


FLAT AUDIO

PRE-EMPHASISMICROPHONE INPUTLEVEL CONTROL

BALANCED INPUT

hi gh = voi cel ow = dat a

X

Y

+9.5V CONTINUOUS


AUXILIARY INPUTLEVEL CONTROL

X Y


BALANCED AGC PREAMP

hi gh = w i deband sel ectl ow = nar r ow band sel ect

X

Y


FLAT AUDIO

PRE-EMPHASIS


X

Y

X

Y

X

Y

FLAT AUDIO

PRE-EMPHASIS

X

Y

TWO PORT POLARITY


3P1

2P1

1P1

4P1

3P3

3P2

1P2

P4

4

P2+9.5V CONTINUOUS

C1010nF

4K53R46

C510nF

1

23

R25K0

FB1

+8.0V SWD

+8.0V SWD

1

2

3

JU5

47uFC13

3

2

1

100K0R48

680nFC7

4.7uFC8

TP3

SELR57

N/I (22nF)C32

Rect In

Var G

Rect Cap

Output

Inv In

R3

THDTrim

15

14

16

10

12

11

9

U1SA571D

a

680nFC42

TP12

4.7uFC26

Vcc

Rect In

Var G

Rect Cap

Output

Inv In

R3

THDTrim

GND

2

3

1

7

5

6

8

13

4

SA571DU1b

2P2

JU16

9

108

U2MC33174

c

R74N/I

R73N/I

13

1214

U2MC33174

d

4.0V

TP6

R4311K8

C39680nF

3

2

1

5K0R42

C351.0uF

C11.0uF

C91.0uF

C301.0uF

R8210K0

C373.3nF

R4916k2

C1410nF

4.0V

R7616k2

C161.0uF

JU33C511.0uF

1

2

3

JU12

R3915K4R41

137K

R5920K0

R6215K4

R51M00

C251.0uF

R6018K2R61

18K2

R82K21

R949K9

R418K2R6

18K2

330nFC36

C153.3nF

R72K21

R1049K9330nF

C19

C21.0uF

R5110K0

2

1

3

JU1

2

1

3

JU2

JU11

TP11

TP4

JU10

R52100K

R65100K

C383.3nF

R112K21

R4049K9

2

1

3JU14

1

23

R315K0

R30604R

TP2

0R0R1

R64100K

R560R0

C41.0uF

231

JU36

JU17

1

2

3JU9

1

23

5K0R63

3

21

5K0R38

MICROPHONE INPUT

SUBTONE INPUT 1

TONE/DIGITAL I/P

Bypassing Compression, V2.3 Audio Processor

B0315

Assuming no data modulation, a second way to route around audio compression is via the direct modulation port P4-3 and route through JU28 to R48 and Op-amp U2C. Subaudible tones enter at P2-2 where level is controlled by R42. A single jumper JU16 enables the audio path to U3A, the summing amplifier/limiter.



Voltage regulator U2A provides a regulated +4.0VDC to all Op-amp stages. Optional potentiometer R14 can be installed (and JU15 removed) for special applications where a voltage other than +4.0VDC is required.

Data normally enters at P4-3, the Direct Modulation Input, then connected via many possible routes selected with jumpers. JU43 allows direct or on-board capacitor coupling. Op-amp U2B can be configured as a buffer with a DC offset to accommodate input data that has a positive DC voltage offset. The data signals can be sent to gain buffers U2C and U2D through potentiometer R48. Jumper JU14 is normally installed so that the output from U2D provides the correct data polarity when using two-port modulation.

A single TX Audio control line on P4-4 has 2 functions. It can be configured to switch U3D inputs between data and voice. Alternately, it can be configured to remotely switch between wideband and narrowband applications by switching between the regular audio path and one carrying half the audio level as determined by resistive divider comprised of R22 and R21.

Due to the complex nature of data modulation methods, the actual configurations and values of selected components for LTRTM, DCS, and Paging modulation are contained in a separate applications manual, AM10-DMS.

X Y

DEVIATIONCONTROL

LOW FREQUENCY / DIRECTMODULATION OUTPUT

X Y

XY

X

Y

10 POLE LOWPASS FI LTER

X

Y

X

Y

VOICE + SUBAUDIBLE

DCS, LTR

X

Y

TCXO DCLEVELADJUST

TCXO MODULATIONLEVEL ADJUST

WIRE JUMPERFOR DUALPORTMODULATIONONLY

- - - - - - ->

1P3

2

P4JU37

2 13

JU22

+9.5V CONTINUOUS

4.7uFC45

4.7uFC28

1

2

3

R2950K0

R5549K9

R7510K0

E

B

C

Q1BC817-25

+8.0V SWD

JU6

JU31

R440R0

R45N/I

C121.0nF

R54SEL

12

3

R3650K0

JU32

SELR32

JU29

47uFC34

R12N/I

R7949K9

In+

In-

Gnd

V-

Vout

V+

Rx

Div/Clk

1

2

3

4

8

7

6

5

U4LTC1569-6

R6622K1

R6730K9

R683K48

R692K00

+8.0V SWDP11

P12

P9 P10

9

108

U3MC33174

c

0R0R72

0R0R58

12

C211.0uF

12

C61.0uF

R3749K9

R3449K9

4.0V

C2410nF

+8.0V SWD

4.0V

JU23

TP7

TP8

TP9

SELR81

JU41

10nFC41

R8610K0

3

2

1

R8350K0

R53N/I

R8027K4

+8.0V SWD

1

2

3

JU35

R7810K0

2

3

1

JU39

12

3JU34

JU38

C23330pF

C44330pF

13

1214

U3MC33174

d

R35SEL

JU8

100nFC27

1.0uFC33

1.0uFC40

1.0uFC471.0uFC46

1

2

3 JU25

R2249K9

R2149K9

1 2

3

4

5

U5TC4S66F

1 2

3

4

5

U6TC4S66F

4.0V

R5049K9

R8849K9

JU26 4.0VC55100nF

JU44

33nFC56

+9.5V CONTINUOUS

R7720K0

JU18

21 3

JU19

2

3

1

JU21

1 2JU45

R89100R

Tx Audio Control

TX Audio Control Circuitry, V2.3 Audio Processor

Tx Audio Control

B0316

20


This Page Intentionally Left Blank

21


TRANSMITTER ALIGNMENT

REPAIR NOTEMT-3 Transmitter modules are mainly made up of surface mount devices which should not be removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount components should be performed only with specifically designed surface mount rework and repair stations complete with Electrostatic Discharge (ESD) Protection.

When removing Surface Mount Solder Jumpers, it is recommended to use solder braid in place of manual vacuum type desoldering tools. This will help prevent damage to the circuit boards.

Transmitter Alignment22


RECOMMENDED TEST EQUIPMENT L ISTAlignment of the complete transmitter requires the following test equipment or its equivalent. It is assumed that any adjustment of the Transmitter Main Board will also involve the other modules.

Dual Power Supply: Regulated +9.5VDC at 2A. (e.g. Topward TPS-4000) Regulated +13.8VDC at 2A

Oscilloscope: 20MHz or better (e.g. Fluke 97 Scopemeter)

Digital Multimeter for DC, RMS AC Voltage and Current (e.g. Fluke 75)

Radio communications test set: e.g. Marconi Instruments 2955R

VSWR 3:1 mismatch load: e.g. JFW 50T-035-3.0:1

Alignment Tool: Johanson 4192

Audio Signal Generator 600Ω Output Impedance, 67Hz to 5KHz range

It is recommended that the radio communications test set be frequency locked to an external reference (WWVH, GPS, Loran C) so that the high stability oscillator may be accurately set to within its ±1 ppm frequency tolerance.

GENERALBefore proceeding with the transmitter alignment, check that the appropriate jumpers are installed. The standard jumper configuration for the Transmitter Main Board is normally employed for transmitter alignment. In a standard configuration, the only alignment required on the MT-3 Transmitter Main Board for a synthesized transmitter is to set the frequency switches (FSW1, FSW2, FSW3, and FSW4) for the desired channel frequency. FSW1 is the most significant digit of the frequency switches. The switch settings for the desired channel frequency can be found in the channel designation tables.

Transmitter alignment is simplified by using a M-3 Subrack, SM-3 System Monitor, and RF extender cable to provide transmitter power and signal interconnection. Alternatively connect power and audio to the subrack connector as follows:

Subrack Connector P1 Pin: +9.5VDC B6, Z6 +13.8VDC B2, Z2 Ground B30, Z30, B32, Z32 600Ω Balanced Audio Across B18 and Z18

Transmitter Alignment 23


Module Installation and Removal

Enhanced or Low Current SynthesizerTo remove the Enhanced Synthesizer module, simply remove the center screw from the module lid and pull the module out. The module should be pulled straight out so that the four alignment pins do not bend or damage the circuit board.

Installation of the Enhanced Synthesizer module is facilitated by alignment pins on each corner of the module. When the four pins are aligned with their corresponding hole in the Transmitter Main Board, push the module down, taking care to ensure that the connector pins on the bottom of the Synthesizer module are not bent.

Low Current SynthesizerWhen removing the Low Current Synthesizer module, it is important to gently lift the synthesizer module “straight out” in order to prevent damage to the connector pins. Remove the two side screws holding the synthesizer module to the tabs. Using a plastic coated lifting tool (such as a small screwdriver with the tip covered in heat shrink material) wedged under the module, gently lift the synthesizer module from the Transmitter Main Board by applying pressure under the four corners in turn. Replace the two side screws.

The Low Current Synthesizer uses two tabs soldered to the Transmitter Main Board for mounting. No alignment pins are used. As a result care must be taken to ensure the connector pins on the bottom of the Synthesizer are not bent. To install the Low Current Synthesizer module, remove the two screws on the side of the synthesizer that correspond to the tabs on the Transmitter Main board and install the synthesizer module taking care not to bend the pins. Replace the two side screws, installing them through the tabs to hold the synthesizer module in place.

STANDARD FACTORY SETTINGS AND JUMPER CONFIGURATIONStandard factory settings and the associated jumper configuration for each module of the MT-3 series transmitter are given below.

MT-3 Transmitter Main Board Factory Configuration

The MT-3 Transmitter Main Board is factory configured as follows:

• Transmitter standby mode 1 (lowest standby current consumption).

• Receiver squelched, de-emphasized audio amplifier disabled.

• Optional relay installed, but with active ground contact disabled.

• Separate amplifier power sense outputs.



AUDIO PROCESSOR ALIGNMENTPrior to commencing the standard deviation adjustment procedure, determine the specific configuration of the Transmitter (i.e. flat audio, pre-emphasis, etc.)

The following points should be noted:

• If the transmitter’s operating frequency is changed beyond the factory recommended bandwidth or if the synthesizer is changed, the FM Audio Processor should be realigned to optimize the transmitter’s performance. The settings tolerance is +/- 0.1kHz.

• At present, LTRTM /DCS is not implemented in the 30-50MHz synthesizers.

• There are slight differences when setting up the transmitter for Flat Audio or Pre-emphasized audio. Although the tuning procedure is the same, there will be skipped sections depending on the transmitter type being tested.

• Although the transmitter is most commonly set up for a single frequency operation, there are times when an application requires multiple frequencies per transmitter. This also changes the standard tuning procedure slightly.

• Before tuning an Audio Processor being used with the following synthesizers: OST-3H035-xxxxx OST-3H045-xxxxx OST-3H141-xxxxx OST-3H162-xxxxx It is important that the synthesizer is providing a signal at the assigned frequency within the specified limits and that the PLL Error DC level (on TP4) is either 2.3V or 4.5V depending on the type of synthesizer.

• Newer versions of the following synthesizers utilize dual-port modulation and are marked with a label indicating “Dual-Port or 2-Port”. They include: OST-3H141-xxxxx OST-3H162-xxxxx OST-3H418-xxxxx OST-3H460-xxxxx

• Due to the variations in the circuitry between models of synthesizer, oscillator and FM Audio Processor, version specific tuning steps are outlined in italics.

• Section C is not an alignment procedure but is included as a final performance measurement that confirms correct Audio Processor alignment.

Multiple Channel TransmittersIn the tuning of the FM Audio Processor for multiple channel transmitters, the procedures on the following pages apply with the following exception:

• The maximum deviation is set on the channel which gives the maximum deviation when using a 1.8kHz tone @ +10dBm. Once that level is set (R29), it is not adjusted again.

The rest of the tuning instructions are carried out while the transmitter frequency is set for the channel, which is roughly in the middle of the band of pre-programmed channels.

Each transmitter manual contains performance specifications for their respective bands. Be aware that the limits change from band to band.

NB=Narrowband (System deviation = ±2.5kHz)

WB=Wideband (System deviation = ±5.0kHz)



TRANSMITTERS WITH PRE-EMPHASIS AND CTCSS SUBTONESection A: Balanced and Subtone Audio Setup

VCO Select Components Table (928-935MHz Band Transmitters)Designation Sirerza Micro (VARIL)

VCO 913-939MHz (VCO 190-926MT)

Murata

VCO 914-939MHz (MQC505-926) JU44 Installed Not InstalledJU45 Not Installed InstalledC56 Not Applicable 33nF / 47nF

Step Reference Action Desired Results Notes1 R2 (Mic I/P)

R29 (Deviation)R31 (Balanced)R38 (Compress)R42 (Subtone1)R63 (Mic Comp)

Turn Fully CWTurn Fully CWTurn Fully CWTurn Fully CWTurn Fully CWTurn Fully CW

AF Filter: Low Pass5kHz or 15kHz

R36 (TCXO) Turn Fully CCW

2 Balanced Input P1-1 and P1-2

Set AF Tone Freq; Level; Filter

AF Gen: 1.8kHz @ +10dBm

3 R29 (Deviation) Adjust R29 for deviation Do not re-adjust.

± 4.8kHz (WB)± 2.4kHz (NB)

4 Subtone 1 input Apply tone 2-Port Synthesizers only AF Gen: 1kHz Tone @ -18dBm

Remaining synthesizers: AF Gen: 100Hz Tone @ -18dBm

5 R42 (Subtone1) Adjust and measure ± 500Hz (WB) ± 350Hz (NB)

Deviation Monitor

6

OST-3H141 (2-Port) OST-3H162 (2-Port)OST-3H418 (2-Port) OST-3H460 (2-Port)

Change AF Gen. freq. AF Gen: 40Hz @ -18dBm

Remaining synthesizers Skip this step: Go to step 10

7 R36 (TCXO) Adjust and measure ± 500Hz (WB) ± 350Hz (NB)

8 Subtone 1 input Change AF Gen. freq. AF Gen: 300Hz @ -18dBm

9 Deviation Monitor Should measure 500Hz (WB)350Hz (NB)

Tolerance on this measurement is ± 50Hz

10 Deviation Monitor Sweep AF Gen. freq. between 67Hz and 250Hz. Measure resultant deviation

± 300Hz to 700Hz (WB)± 250Hz to 550Hz (NB)


Change frequency, level AF Gen: 1kHz Tone @ +10dBm

12 R38 (Compress) Adjust and measure Deviation should be greater than ± 4kHz (WB) or ± 2kHz (NB)

Distortion Analyzer AF Filter: 15kHz4.0% THD



13 AF Gen. Change level 1kHz Tone @ -8dBm14 R31 (Balanced) Adjust and measure ± 3kHz (WB)

± 1.5kHz (NB)Deviation Monitor

15 AF Gen Change level 1kHz Tone @ -18dBm16 R31 (Balanced) Measure and confirm ± 1kHz (WB)

± 0.5kHz (NB)Tolerance on this measurement is ± 50Hz

Section B: Microphone Audio SetupStep Reference Action Desired Results Notes

17 Microphone Input Front Panel Pin 2 Apply Tone AF Gen: 1kHz Tone

@ +10dBm

A

DATE: 28 MARCH 2005

TITLE: TX MICROPHONE CONNECTOR DETAILS

DRAWN BY: EVA DANIELS

REV DATE: - - -DWG No: B0486-01

DANIELSELECTRONICS LTD

TM1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30

FRONT VIEW

3 2

4 1

MIC AUDIO

MIC GND

MIC Connector - Front View

18 R63 (Mic Comp) Adjust and measure Deviation should be >± 4kHz (WB) or ± 2kHz (NB)

Distortion Analyzer AF Filter: 15kHz 4.0% THD

19 Microphone Input Front Panel Pin 2

Change level AF Gen: 1kHz Tone @ -10dBm

20 R2 (Microphone) Adjust and measure ± 3kHz (WB) ± 1.5kHz (NB)

Deviation monitor

21 Microphone Input Front Panel Pin 2

Change level AF Gen: 1kHz Tone@ -20dBm

22 R2 (Microphone) Measure and confirm ± 50Hz

± 1kHz (WB) ± 0.5kHz (NB)

Deviation monitor

Section C: Audio Frequency Response and DeviationStep Reference Action Desired Results Notes23 AF Gen level Set and measure AF Gen: +10dBm24 Balanced Audio Input Sweep from 300Hz to

2.5kHz in 100Hz steps± 5.0kHz (WB) ± 2.5kHz (NB)

Deviation should not exceed maximum deviation.

Note the maximum deviation frequency. Record this on the test sheet.

25 Balanced Audio Input Apply tone AF Gen 1kHz @ -18dBm

26 Perform AF Frequency Response from 300Hz to 5kHz

As per test sheet limits (FIT-018)



TRANSMITTERS WITH FLAT AUDIOVCO Select Components Table (928-935MHz B and Transmitters with Flat Audio)

Designation Sirerza Micro (VARIL)

VCO 913-939MHz (VCO 190-926MT)

Murata

VCO 914-939MHz (MQC505-926) JU44 Installed Not Installed

JU45 Not Installed Installed

C56 Not Applicable 33nF / 47nF

Section A: Balanced and Subtone Audio SetupStep Reference Action Desired Results Notes1 R2 (Mic I/P)

R29 (Deviation)R31 (Balanced)R38 (Compress)R42 (Subtone1)R63 (Mic Comp)

Turn Fully CWTurn Fully CWTurn Fully CWTurn Fully CWTurn Fully CWTurn Fully CW

AF Filter: Low Pass5kHz or 15kHz

NO COMPRESSION

NO COMPRESSIONR36 (TCXO) Turn Fully CCW

930 and 950MHz Go to step 42 Balanced Input

P1-1 and P1-2Set AF Gen. Freq; Level; Filter

AF Gen: 1.8kHz @ +10dBm


± 4.8kHz (WB)± 2.4kHz (NB)

Step 4 to 7 for 930 and 950MHz ONLY4 Balanced Input

P1-1 and P1-2Set AF Gen level AF Gen: +10dBm

5 Deviation Monitor Sweep AF Gen frequency between 300Hz and 2.5kHz in 100Hz steps.

Search and record the frequency with max deviation.


Set AF Gen. Freq. on the freq. recorded at step 5.

AF Gen: +10dBm


± 4.8kHz (WB)± 2.4kHz (NB)

8 Subtone 1 input Apply tone 2-Port Synthesizers only AF Gen: 1kHz Tone @ -18dBm

Remaining synthesizers; AF Gen: 100Hz Tone @ -18dBm

9 R42 (Subtone1) Adjust and measure ± 500Hz (WB) ± 350Hz (NB)

Deviation Monitor

10 OST-3H141 (2-Port) OST-3H162 (2-Port)OST-3H418 (2-Port) OST-3H460 (2-Port)

Change AF Gen. freq. AF Gen: 40Hz @ -18dB

Remaining synthesizers skip this step: Go to step 14

11 R36 (TCXO) Adjust and measure ± 500Hz (WB) ± 350Hz (NB)

12 Subtone 1 input Change AF Gen. freq. AF Gen: 300Hz @ -18dBm



13 Deviation Monitor Should measure 500Hz (WB) 350Hz (NB)

Toleranca on this measurement is ± 50Hzfor both WB and NB.

14 Deviation Monitor Sweep AF Gen. freq. between 67Hz and 250Hz. Measure resultant deviation

± 300Hz to 700Hz (WB)± 250Hz to 550Hz (NB)

15 AF Gen Change level 1kHz Tone @ -8dBm16 R31 (Balanced) Adjust and measure ± 3kHz (WB)

± 1.5kHz (NB)Deviation Monitor

Step 17 is for 930MHz with Murata MQC505-926 (914-939MHz) VCO only

17 C56 Change to 47nF

only if audio response falls below -1.0dB between 300Hz and 2.0kHz

Also apply to 930 and 950MHz TX’s with flat audio config. IF audio response @300Hz falls below -1.0dB limit.

Section B: Microphone Audio SetupStep Reference Action Desired Results Notes

18 Microphone Input Front Panel Pin 2 Change level AF Gen: 1kHz Tone

@ -10dBm

A

DATE: 28 MARCH 2005

TITLE: TX MICROPHONE CONNECTOR DETAILS

DRAWN BY: EVA DANIELS

REV DATE: - - -DWG No: B0486-01


TM1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30

FRONT VIEW

3 2

4 1

MIC AUDIO

MIC GND

MIC Connector - Front View

19 R2 Adjust and measure ± 3kHz (WB) ± 1.5kHz (NB)

Deviation monitor

Section C: Audio Frequency Response and Deviation

Step Reference Action Desired Results Notes20 AF Gen level Set and measure +10dBm21 Balanced Audio Input Sweep from 300Hz to

2.5kHz in 100Hz steps± 5.0kHz (WB) ± 2.5kHz (NB)

Deviation should not exceed maximum deviation.

Note the maximum deviation frequency. Record this on the test sheet.

22 Balanced Audio Input Apply tone AF Gen 1kHz @ -18dBm

23 Perform AF Frequency Response from 300Hz to 5kHz (4kHz for 900MHz)

As per test sheet limits(FIT-018)



TROUBLESHOOTINGBalanced Input Test

1) Connect an Audio Generator set for a 1.8kHz tone @ +10dBm output to the Balanced Input (P1-1 and P1-2). The Waveform Levels Table below indicates expected levels and waveforms for various measurement points.

2) Change the Audio Generator settings for a 1kHz tone @ +10dBm output. Confirm the waveforms and levels using the Waveform Level Table below.

3) Repeat for the various audio frequencies and levels and compare with the levels in the table below.

Waveform Levels

Test Point Limiting Test Std Level Mic Test SubtoneMeasured @ 1.8kHz @ +10dBm 1kHz @ -8dBm 1kHz @ -10dBm 100kHz @ -18dBm

TP3 5.2V P-P 3.8V P-P N/A N/ATP12 N/A N/A 3.8V P-P N/ATP10 6.5V P-P 4.9V P-P 4.8V P-P 1.1V P-PTP5 2.4V P-P 1.3V P-P 1.9V P-P 0.4V P-PJU6 2.8V P-P 1.7V P-P 1.8V P-P 0.4V P-P

*TP8 1.5V P-P NB 0.9V P-P NB 0.9V P-P NB 0.2V P-P NB

3.0 V P-P WB 1.8 V P-P WB 1.8 V P-P WB 0.4V P-P WB

*These values will differ depending on the oscillator/synthesizer model

Frequency Response TestMeasurements are made at JU8 with respect to ground.

1) Reduce Audio Generator level to –18dBm (98 mV RMS).

2) Step frequency to 300, 500, 1000, 2000 and 2500Hz.

3) Ensure that the results conform to the 6dB/octave +/- 1 dB from 500Hz to 2500Hz referenced to 1000Hz (+1/-2 dB at 300Hz).

Subtone Input Test

1) Change Audio Generator frequency to 100Hz and maintain level at –18dBm (98 mV RMS).

2) Connect signal to Subtone Input 1 (P2-2) and ground (P1-4).

3) Refer to the Waveform Levels Table above and confirm levels.



TEMPERATURE COMPENSATIONThe FM Audio Processor includes temperature compensation circuitry to maintain a constant transmitter audio deviation with a fixed level input signal. It is capable of not only compensating for temperature related level variations within the FM Audio Processor (typically –0.3 to –0.5 dB at –40ºC) but can also compensate for changes caused by the synthesizer that is not equipped with its own temperature compensation.

Specifications:

Wideband

When a 1.8kHz tone is applied at a level of +10dBm to the balanced input of the transmitter, the transmitter deviation shall be ±4.8kHz at room temperature and can vary from ±4.5kHz to ±5.0kHz from -40ºC to +60ºC.

Narrowband

When a 1.8kHz tone is applied at a level of +10dBm to the balanced input of the transmitter, the transmitter deviation shall be ±2.4kHz at room temperature and can vary from ±2.25kHz to ±2.5kHz from -40ºC to +60ºC.

Since the specifications of the components used in the synthesizer or oscillator may change over time, changes to the temperature compensation circuit may be necessary even for the same type of equipment.

Contact the factory for more information on values used.

31


INTERCONNECT PIN DEFINITIONS AND JUMPER CONFIGURATIONS

The MT-3 series Transmitter employs a 48 pin Eurostandard connector for interfacing to all transmitter power, audio, and control functions. The following are the MT-3 series Transmitter backplane connections to the M-3 Motherboard.

INTERCONNECTION PIN DEFINIT IONSPin Name Pin Name Pin NameD2 No Connect B2 +13.8VDC Z2 +13.8VDCD4 No Connect B4 MIC Out Z4 MIC InD6 No Connect B6 +9.5VDC Z6 +9.5VDCD8 No Connect B8 Relay Positive Z8 Relay NegativeD10 No Connect B10 PTT WTO Z10 PTT WTOD12 No Connect B12 TX Standby Z12 TX StandbyD14 No Connect (IMC1) B14 PTT NTO Z14 PTT NTOD16 No Connect (IMC2) B16 No Connect (MT-2 +9.5V) Z16 No Connect (MT-2 +9.5V)D18 No Connect (IMC3) B18 Balanced Input 2 Z18 Balanced Input 1D20 Channel Select 0 (LSB) B20 Squelched, De-emph Audio In Z20 Squelched, Flat Audio InD22 Channel Select 1 B22 Subtone Input 1 Z22 TX Audio ControlD24 Channel Select 2 B24 PTT Output Z24 Subtone Input 2D26 Channel Select 3 (MSB) B26 Forward Power Sense Z26 VSWR Reverse SenseD28 Synth TX Data (Output) B28 RX Monitor Out Z28 Direct Mod InputD30 Synth Rx Data (Input) B30 Ground Z30 GroundD32 Synth Bootstrap (Input) B32 Ground Z32 Ground

VHF AMP-2 Alignment32


MT-3 Transmitter Main Board JumpersJumper Default Position Description

J2 X Optional relay configurationJ3 X Optional relay configurationJ4 Y Optional relay configurationJ6 Not Installed Transmitter standby mode select - Mode 1J7 Y Audio processor standby mode selectJ9 Not Installed Receiver audio AC/DC input couplingJ12 Not Installed Amplifier power sense output configurationJ13 X Amplifier power sense output configurationJ14 X Amplifier power sense output configurationJ15 X Amplifier power sense output configurationJ16 X Microphone configurationJ17 Installed Microphone output line J18 Y Synthesizer module standby mode selectJ19 X 600Ω audio transformer enable ‘Y’ position disablesJ20 X 600Ω audio transformer enable ‘Y’ position disablesJ21 Not Installed +8VDC audio processor supply bypassJ22 X 600Ω audio transformer enable ‘Y’ position disablesJ23 X 600Ω audio transformer enable ‘Y’ position disablesJ24 Installed Subtone #2 output enableJ25 X Audio output enableJ26 Installed Time-Out-Timer Timing resistor selectJ27 Not Installed Time-Out-Timer Timing resistor selectJ28 Not Installed Time-Out-Timer Timing period output selectJ29 Installed Time-Out-Timer Timing period output selectJ31 Installed Time-Out-Timer Timing period output selectJ32 Not Installed Time-Out-Timer Timing period output selectJ33 Installed Time-Out-Timer input enableJ34 Installed Time-Out-Timer power enableJ35 Installed Time-Out-Timer output enable

Note: Jumpers J1, J5, J8, J10, and J11 designations not used


Interconnect Pins and Jumper Confi guration 33

Jumper Default Type Position Description

WB VHF Pre-emphasis CTCSS / Synthesized

WB VHF Flat CTCSS / Synthesized

WB UHF Pre-emphasis CTCSS / Synthesized

WB UHF Flat CTCSS / Synthesized

1 XY Y Microphone Pre-Emphasis/Flat Audio Y X Y X2 XY Y Balanced Audio Pre-Emphasis/Flat Audio Y X Y X3 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.43 Refer to pg.43 Refer to pg.434 XY Not Installed Subtone input 2 audio path select5 XY Not Installed Auxiliary Input routing6 Single Installed Splatter Filter Output Installed Installed Installed Installed7 Single Not Installed Auxiliary output routing8 Single Not Installed Direct Coupled final OP Amp O/P9 XY Not Installed Auxiliary Output - Pre-Emphasis/Flat Not Installed Not Installed Not Installed Not Installed10 Single Not Installed 4V AC Ground Not Installed Not Installed Not Installed Not Installed11 Single Not Installed Balanced Input Compression Bypass12 XY Not Installed Tone/Digital Input AC/DC Coupling13 Single Not Installed Direct Modulation Audio Routing14 XY Not Installed Two Port Polarity Select Not Installed Not Installed Not Installed Not Installed15 XY XY 4V Regulator adjust (Bypassed) X and Y both X and Y both X and Y both X and Y both16 Single Installed Subaudible Enable Installed Installed Installed Installed17 Single Not Installed Balanced Input Adjust Range extend18 Single Not Installed Audio Gate disable19 XY Y Voltage Select (+9.5V/8V) Audio gates Y Y Y Y20 XY Not Installed Direct Modulation Audio Routing21 XY X Audio Gate Switch X X X X 22 XY Y Splatter Filter Enable/Bypass Y Y Y Y23 Single Not Installed Narrow Band gain reduction Not Installed Not Installed Not Installed Not Installed24 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.43 Refer to pg.43 Refer to pg.4325 XY Not Installed Wide/Narrow Band switched select Not Installed Not Installed X X26 Single Not Installed Auxiliary output routing Not Installed Not Installed Not Installed Not Installed27 XY Not Installed Direct Modulation Input Offset Output28 Single Not Installed Direct Modulation Input Routing Not Installed Not Installed Not Installed Not Installed29 Single Not Installed Coupling Capacitor selection Installed Installed Installed Installed30 N/A N/A This skipped designator has been deleted31 Single Not Installed Splatter Filter output routing Not Installed Not Installed Not installed Not installed32 Single Not Installed Coupling Capacitor selection Installed Installed Installed Installed33 Single Not Installed Direct Input Coupling - Auxiliary amplifier Not Installed Not Installed Not Installed Not Installed34 XY Not Installed Audio Routing35 XY Not Installed Audio Routing See Note See Note See Note See Note 36 XY X AGC Preamp Power select X X X X37 Single Not Installed Direct Couple (TCXO)38 Single Installed Low pass enable Installed Installed Installed Installed39 XY X Low Frequency amplifier bias select X X X X40 N/A N/A This skipped designator has been deleted41 Single Not Installed Narrow Band gain reduction Not Installed Not Installed Not Installed Not Installed42 XY Not Installed Direct Modulation input bias select43 Single Not Installed Direct Modulation Direct/Cap couple44 Single Not Installed Coupling Capacitor selection Installed Installed45 Single Installed Coupling Capacitor selection (Default) Installed Installed Installed Installed

Note: Install wire jumper from JU35 (No jumper on X or Y) to right pad of R89 (next to JU26)

AUDIO PROCESSOR JUMPER TABLES

Wideband VHF and UHF Synthesized Transmitters

TCXO Op Amp WB WB Desig. VHF/CTCSS UHF/CTCSS C34 1uF 1uF C44 330pF 330pF C56 33nF 33nF R32 51K 51K R35 0R0 0R0 R54 100R 100R R81 Not Installed Not Installed

Auxiliary Op Amp WB WB Desig. VHF/CTCSS UHF/CTCSS R57 Not Installed Not Installed


Interconnect Pins and Jumper Confi guration34


NB VHF Pre-emphasis CTCSS / Synthesized

NB VHF Flat CTCSS / Synthesized

NB UHF Pre-emphasis CTCSS / Synthesized

NB UHF Flat CTCSS / Synthesized

1 XY Y Microphone Pre-Emphasis/Flat Audio Y X Y X2 XY Y Balanced Audio Pre-Emphasis/Flat Audio Y X Y X3 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.43 Refer to pg.43 Refer to pg.434 XY Not Installed Subtone input 2 audio path select5 XY Not Installed Auxiliary Input routing6 Single Installed Splatter Filter Output Installed Installed Installed Installed7 Single Not Installed Auxiliary output routing8 Single Not Installed Direct Coupled final OP Amp O/P9 XY Not Installed Auxiliary Output - Pre-Emphasis/Flat Not Installed Not Installed Not Installed Not Installed10 Single Not Installed 4V AC Ground Not Installed Not Installed Not Installed Not Installed11 Single Not Installed Balanced Input Compression Bypass12 XY Not Installed Tone/Digital Input AC/DC Coupling13 Single Not Installed Direct Modulation Audio Routing14 XY Not Installed Two Port Polarity Select Not Installed Not Installed Not Installed Not Installed15 XY XY 4V Regulator adjust (Bypassed) X and Y both X and Y both X and Y both X and Y both16 Single Installed Subaudible Enable Installed Installed Installed Installed17 Single Not Installed Balanced Input Adjust Range extend18 Single Not Installed Audio Gate disable19 XY Y Voltage Select (+9.5V/8V) Audio gates Y Y Y Y20 XY Not Installed Direct Modulation Audio Routing21 XY X Audio Gate Switch X X X X22 XY Y Splatter Filter Enable/Bypass Y Y Y Y23 Single Not Installed Narrow Band gain reduction Installed Installed Installed Installed24 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.43 Refer to pg.43 Refer to pg.4325 XY Not Installed Wide/Narrow Band switched select Not Installed Not Installed X X26 Single Not Installed Auxiliary output routing Not Installed Not Installed Not Installed Not Installed27 XY Not Installed Direct Modulation Input Offset Output28 Single Not Installed Direct Modulation Input Routing Not Installed Not Installed Not Installed Not Installed29 Single Not Installed Coupling Capacitor selection Installed Installed Installed Installed30 N/A N/A This skipped designator has been deleted31 Single Not Installed Splatter Filter output routing Not Installed Not Installed Not installed Not installed32 Single Not Installed Coupling Capacitor selection Installed Installed Installed Installed33 Single Not Installed Direct Input Coupling - Auxiliary amplifier Not Installed Not Installed Not Installed Not Installed34 XY Not Installed Audio Routing35 XY Not Installed Audio Routing See Note: See Note: See Note: See Note:36 XY X AGC Preamp Power select X X X X37 Single Not Installed Direct Couple (TCXO) Not Installed Not Installed Not installed Not installed38 Single Installed Low pass enable Installed Installed Installed Installed39 XY X Low Frequency amplifier bias select X X X X40 N/A N/A This skipped designator has been deleted41 Single Not Installed Narrow Band gain reduction Not Installed Not Installed Not Installed Not Installed42 XY Not Installed Direct Modulation input bias select43 Single Not Installed Direct Modulation Direct/Cap couple44 Single Not Installed Coupling Capacitor selection Installed Installed45 Single Installed Coupling Capacitor selection (Default) Installed Installed Installed Installed

Note: Install wire jumper from JU35-2 (No jumper on X or Y) to left pad of R89 (next to test point 8)

TCXO Op Amp NB NB Desig. VHF/CTCSS UHF/CTCSS C34 1uF 1uF C44 330pF 330pF C56 33nF 33nF R32 51K1 51K1 R35 0R0 0R0 R54 100R 100R R81 Not Installed Not Installed

Auxiliary Op Amp Desig. R57 Not Installed Not Installed

Narrowband VHF and UHF Synthesized Transmitters


Interconnect Pins and Jumper Confi guration 35


WB VHF Pre-emphasis CTCSS / Synthesized

WB VHF Flat CTCSS / Synthesized

1 XY Y Microphone Pre-Emphasis/Flat Audio Y X2 XY Y Balanced Audio Pre-Emphasis/Flat Audio Y X3 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.434 XY Not Installed Subtone input 2 audio path select Not Installed Not Installed5 XY Not Installed Auxiliary Input routing Not Installed Not Installed6 Single Installed Splatter Filter Output Installed Installed7 Single Not Installed Auxiliary output routing Not Installed Not Installed8 Single Not Installed Direct Coupled final OP Amp O/P Not Installed Not Installed9 XY Not Installed Auxiliary Output - Pre-Emphasis/Flat Not Installed Not Installed10 Single Not Installed 4V AC Ground Not Installed Not Installed11 Single Not Installed Balanced Input Compression Bypass Not Installed Not Installed12 XY Not Installed Tone/Digital Input AC/DC Coupling Not Installed Not Installed13 Single Not Installed Direct Modulation Audio Routing Not Installed Not Installed14 XY Not Installed Two Port Polarity Select Not Installed Not Installed15 XY XY 4V Regulator adjust (Bypassed) X and Y both X and Y both16 Single Installed Subaudible Enable Installed Installed17 Single Not Installed Balanced Input Adjust Range extend Not Installed Not Installed18 Single Not Installed Audio Gate disable Not Installed Not Installed19 XY Y Voltage Select (+9.5V/8V) Audio gates Y Y20 XY Not Installed Direct Modulation Audio Routing Not Installed Not Installed21 XY X Audio Gate Switch X X22 XY Y Splatter Filter Enable/Bypass Y Y23 Single Not Installed Narrow Band gain reduction Not Installed Not Installed24 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.4325 XY Not Installed Wide/Narrow Band switched select Not Installed Not Installed26 Single Not Installed Auxiliary output routing Not Installed Not Installed27 XY Not Installed Direct Modulation Input Offset Output Not Installed Not Installed28 Single Not Installed Direct Modulation Input Routing Not Installed Not Installed29 Single Not Installed Coupling Capacitor selection Not Installed Not Installed30 N/A N/A This skipped designator has been deleted N/A N/A31 Single Not Installed Splatter Filter output routing Not Installed Not Installed32 Single Not Installed Coupling Capacitor selection Not Installed Not Installed33 Single Not Installed Direct Input Coupling - Auxiliary amplifier Not Installed Not Installed34 XY Not Installed Audio Routing Not Installed Not Installed35 XY Not Installed Audio Routing Not Installed Not Installed36 XY X AGC Preamp Power select X X37 Single Not Installed Direct Couple (TCXO) Not Installed Not Installed38 Single Installed Low pass enable Installed Installed39 XY X Low Frequency amplifier bias select X X40 N/A N/A This skipped designator has been deleted N/A N/A41 Single Not Installed Narrow Band gain reduction Not Installed Not Installed42 XY Not Installed Direct Modulation input bias select Not Installed Not Installed43 Single Not Installed Direct Modulation Direct/Cap couple Not Installed Not Installed44 Single Not Installed Coupling Capacitor selection Installed Installed45 Single Installed Coupling Capacitor selection (Default) Installed Installed

TCXO Op Amp WB VHF WB VHF Pre-emphasis Flat CTCSS / CTCSS / Desig. Synthesized Synthesized C44 Not Installed Not Installed

Lowband VHF (35 MHz and 45 MHz) Wideband Synthesized Transmitters


Interconnect Pins and Jumper Confi guration36

Jumper Default Type Position Description VHF LTRTM UHF LTRTM 860 MHz LTRTMDefault 950 MHz LTRTM

1 XY Y Microphone Pre-Emphasis/Flat Audio Y Y Y Y2 XY Y Balanced Audio Pre-Emphasis/Flat Audio Y Y Y Y3 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.43 Refer to pg.43 Refer to pg.434 XY Not Installed Subtone input 2 audio path select5 XY Not Installed Auxiliary Input routing Y Y Not Installed Y6 Single Installed Splatter Filter Output Installed Installed Installed Installed7 Single Not Installed Auxiliary output routing8 Single Not Installed Direct Coupled final OP Amp O/P9 XY Not Installed Auxiliary Output - Pre-Emphasis/Flat X X Not Installed X10 Single Not Installed 4V AC Ground Installed Installed Not Installed Installed11 Single Not Installed Balanced Input Compression Bypass12 XY Not Installed Tone/Digital Input AC/DC Coupling13 Single Not Installed Direct Modulation Audio Routing Installed14 XY Not Installed Two Port Polarity Select Y Y Not Installed Y15 XY XY 4V Regulator adjust (Bypassed) X and Y both X and Y both X and Y both X and Y both16 Single Installed Subaudible Enable Not Installed Not Installed Not Installed Not Installed17 Single Not Installed Balanced Input Adjust Range extend18 Single Not Installed Audio Gate disable19 XY Y Voltage Select (+9.5V/8V) Audio gates Y Y Y Y20 XY Not Installed Direct Modulation Audio Routing21 XY X Audio Gate Switch X X X X22 XY Y Splatter Filter Enable/Bypass Y Y Y Y23 Single Not Installed Narrow Band gain reduction NB Only NB Only NB Only NB Only24 XY Factory Custom Temperature Compensation Network Refer to pg.43 Refer to pg.43 Refer to pg.43 Refer to pg.4325 XY Not Installed Wide/Narrow Band switched select26 Single Not Installed Auxiliary output routing Installed Installed Not Installed Installed27 XY Not Installed Direct Modulation Input Offset Output28 Single Not Installed Direct Modulation Input Routing Installed Installed Installed Installed29 Single Not Installed Coupling Capacitor selection Installed Installed Not Installed Installed30 N/A N/A This skipped designator has been deleted31 Single Not Installed Splatter Filter output routing Not Installed Not Installed Not Installed Not Installed32 Single Not Installed Coupling Capacitor selection Installed Installed Not Installed Installed33 Single Not Installed Direct Input Coupling - Auxiliary amplifier Installed Installed Not Installed Installed34 XY Not Installed Audio Routing35 XY Not Installed Audio Routing Y Y Y Y36 XY X AGC Preamp Power select X X X X37 Single Not Installed Direct Couple (TCXO) Not Installed Not Installed Not Installed Not Installed38 Single Installed Low pass enable Installed Installed Installed Installed39 XY X Low Frequency amplifier bias select X X X X40 N/A N/A This skipped designator has been deleted41 Single Not Installed Narrow Band gain reduction Not installed Not installed Not installed42 XY Not Installed Direct Modulation input bias select Not installed Not installed Not installed43 Single Not Installed Direct Modulation Direct/Cap couple Not installed Not installed Not installed44 Single Not Installed Coupling Capacitor selection Installed Installed Not Installed Installed45 Single Installed Coupling Capacitor selection (Default) Installed Installed Installed Installed

Note: For more detailed inFormation on LTRTM setup, contact the factory and refer to the Data Modulation and Signaling Applications Manual, AM10-DMS.

TCXO Op Amp Desig. 860 MHz LTRTM 950 MHz LTRTM

C34 47uF 47uF C44 330pF 330pF C56 22nF 33nF R32 51K1 51K1 R35 0R0 0R0 R54 10K0 10K0 R81 Not installed Not installed

Auxiliary Op Amp

Desig. R57 Not Installed 38K3

TCXO Op Amp Desig. VHF LTRTM UHF LTRTM

C34 47uF 47uF C44 330pF 330pF C56 33nF 33nF R32 51K1 51K1 R35 0R0 0R0 R54 10K0 10K0 R81 Not installed Not installed

Auxiliary Op Amp

Desig. R57 22K1 38K3

LTRTM Modulated Transmitters


37

PRINTED CIRCUIT BOARD NUMBERING CONVENTIONDaniels Electronics Ltd. has adopted a printed circuit board (PCB) numbering convention in which the last two digits of the circuit board number represent the circuit board version. All PCB’s manuFactured by Daniels Electronics Ltd. are identified by one of the following numbering conventions:

PCB number 43-912010 Indicates circuit board version 1.0

PCB number 50002-02 Indicates circuit board version 2 (no decimal version)

ILLUSTRATIONS AND SCHEMATICS


Illustrations and Schematics38

TRANSMITTER BLOCK DIAGRAM

DATE: 25 JUN 03

TITLE: MT-3 TRANSMITTER BLOCK DIAGRAM

DRAWN BY: S. EARTHY

REV DATE: 07 MAR 05DWG No: B0286-04

1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30

A

LED ENA

XX

X

Y

YY

Y

X

XY

B20

J16

RELAY1

J2

12

1311

U2d

U2c

D32

D20

+9.5VDC

+9.5 VDC

2

13

U2a

J17

JP1-2

+9.5 VDC

Z20

B4

Z4

B22

Z18

B18

Z24

Z28

B12

Z12

B10

Z10

B14

Z14

B24

D12

D2

B8

Z8

D8

D10J1

D30

D28

D22

D24

D26

Z22

B26

Z26

Z30

Z32

B30

D6

D4Y

XJ4

X

Y

+9.5V

+9.5V OUTPUT

GROUNDMIC PTT WTO

MIC PTT NTO

MIC AUDIO

MT-3 FRONT PANEL BOARD

RX AUDIO / +13.8V

B2

Z2

+13.8VDCB6

Z6

OS-3 SYNTHESIZER MODULE

RFRONT PANELN CONNECTO

RF INRF OUT

+9.5V

+13.8V

FOR REV

ENA

MT-3 VHF/UHF AMPLIFIER MODULE

OR

LED ENA

+9.5VDC

PTT TRIGGER

PTT WTOTRIGGER

+9.5VDC

SWITCHING CIRCUITRY

+9.5VDC

VSWR REVERSE

FORWARD POWER FAILINDICATOR

10-17 VOLTS+ 13.8 VDC NOMINAL

BACKPLANECONNECTOR

GROUND

GROUND

GROUND

GROUND

RX DATA IN

TX DATA OUT

BOOTSTRAP

CHANNEL SEL 0 (LSB)

CHANNEL SEL 1

CHANNEL SEL 2

CHANNEL SEL 3 (MSB)

TX AUDIO CONTROL

+9.5 VDC PTT SWITCHEDJ12

R2527K4 R26

1K0

Q10PZT2222A

J14

J15J13

FUSE(OPTIONAL)

+9.5 VDC CONTINUOUS

J9

SQL DE-EMP INPUT

MIC OUT

MIC IN

BALANCED INPUTSIDE 2

600 OHMS

BALANCED INPUTSIDE 1

SUBTONEINPUT #1

SUBTONEINPUT #2

SQL FLATINPUT

DIRECT MODINPUT

PTT WTO

TX STANDBY

NO2

COMMON 2

NC2

RLY POS

RLY NEG

NC 2

NC 1

COMMON 1

PTT NTO

PTT OUTPUT PTT OUTPUT

TX STANDBY

PTT

+ 9.5 VDC PTT SWITCHED

+ 9.5 VDC SWITCHED

J3

Y

XJ7


+ 9.5 VDC SWITCHED

8

10

9

1 7 9 8

10 4 2 3

MSD LSD

T1600¦

PTT

Y

XJ18


+ 9.5 VDC SWITCHED

PTT OUTPUT

8 VDCSUPPLY

+9.5 VDC

Y

X

Y

X

Y

X

Y

X

J20

J22

J23

J19AUDIO OUTPUT

LOWFREQUENCY / DIRECT

MICROPHONEINPUT

BALANCED INPUT

+9.5V

+8.0V SWITCHED

TONE/DIGITAL INPUT

SUBTONE #1 INPUT

SUBTONE #2 INPUT

DIRECT MODULATION INPUT

GND

MT-3 AUDIO PROCESSOR

AUDIO CONTROL AM(N/C)

AM(N/C)

AM(N/C)

AM(N/C)

MODULATIONOUTPUT

AM(N/C)

TOT INPUT

TOT OUTPUT

J35J33

TOT INPUT TOT OUTPUT

TIME OUT TIMER

Y

XJ25

JP1-7

B32

DefaultFM


TM

67

8

01

32

45

9

67

8

01

32

45

9

67

8

01

32

45

901

3

2

4

8

C

A

B

9

D

7

65

F

E

PLL CONTROLMICROPROCESSOR

VCO

HIGH STABILITY10/9.6 MHz REFERENCE(± 1ppm -40°C to +60°C) FINE FREQUENCY ADJUST

(ACCESS HOLE THROUGHSYNTHESIZER COVER)

JU2FREQUENCY REFERENCE 10/9.6 MHz

SELECT

5 VDC SUPPLY&

8VDC SUPPLY

JU1BA

INTERNAL / EXTERNAL REFERENCE SELECT

A

RF OUT

REFERENCEINPUT


Illustrations and Schematics 39

DATE: 9 OCTOBER 2001

TITLE: MT-3 TRANSMITTER MAIN BOARD (TOP)

BOARD NO: 43-920917

REV DATE: 06 OCTOBER 2005

A111

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30


TM

DWG No: 01-T-04-04

A

FACTORY INSTALLED JUMPERS

J29

J28

J32

J31

J27

J26

J35

J33

J34


A

J29

J28

J32

J31

J27

J26

J35

J33

J34

A

678

01

32 4

5

9

678

01

32 4

5

9

COMPONENTS NOT INSTALLED

D2

12

24

32

B Z

D B Z

3 1

24

3 1

24

3 1

24

3 1

24

3 1

24

MT-3 AUDIO PROCESSOR BOARD

MT-

3 TX

FR

ON

T P

AN

EL

BO

AR

D

3

1 2

4

3

1 2

4

3

1 2

4

01

3

2

4

8

C

AB

9

D

7

65F

E

678

01

32 4

5

9

A

JS3

121110987654321

2019181716151413

T1

SPT-196

JS2

JS1

1 2

1ROW X 12PIN1ROW X 9PIN

1ROW X 6PIN

1ROW X 2PIN

RELAY1

EN

A+9

.5V

13.8

VFO

RR

EV

GN

DA

UD

IO IN

C23100nF

FSW4BCD-10

FSW3BCD-10

FSW2BCD-10

FSW1BCD-16

JA1JA2JA3 JA4 JA5

56

4321

12B

R42OPTIONAL

CONN1

JF1

JF3

JF2

A

M2.5 HEX NUT5813-2M5PP10S


8

7

6

5

4

3

2

1

A B C D E F G H I J K L M

TP19 TP20TP22TP21

TP15 TP16TP18TP17

TP12TP13

TP14

TP1 TP2

TP3TP4

TP5TP6

TP8

TP9

TP10

TP11

TP7

TP25

TP26

TP27

TP28

TP29

TP30

TP24TP23

TP33TP34

TP31

TP32

OS-3 RFOUTPUT

OC-3 RFOUTPUT

OST-3H RFOUTPUT

JS3

121110987654321

2019181716151413

JS2

JS1

1 2

56

4321

12B

SYNTHESIZER MODULE

DES SD LCCOMPONENT LOCATION TABLE

C1 B E1C2 B D1C3 B C4 C4 B B4C5 B E5C6 B D5C7 B D6C8 B D6C10 B D2C12 B M5C13 B M5C14 B F7

J16 B F6J17 B E7J18 B F5

JS1 T H4 JS2 T E5 JS3 T F2

LPF1 B B8LPF2 B B7LPF3 B B7LPF4 B B7LPF5 B B7LPF8 B B6LPF10 B B6LPF12 B B6

LPF15 B B5

LPF18 B B4LPF19 B B4LPF20 B B4LPF21 B B4LPF22 B B4LPF23 B B3

LPF24 B B3LPF25 B B3LPF26 B B3LPF27 B B3LPF28 B B2LPF29 B B2LPF30 B B2LPF31 B B2LPF32 B B2LPF33 B B1LPF34 B B1LPF35 B B1

Q1 B E6Q3 B E5Q4 B F5Q5 B F4Q6 B E5Q7 B E4Q8 B D5Q9 B D4Q10 B C1

Q11 B I3

R1 B C7

R3 B D6R4 B E6R5 B C6R6 B D6R7 B D5R8 B D5R9 B C7R10 B C7R11 B E7R12 B E7

R14 B E6R15 B E6R16 B F5R17 B L7R18 B E6R19 B E5

R20 B F5R21 B E5R22 B E5R24 B D4R25 B C1R26 B C2

R29 B F6R30 B E7R31 B I4R32 B I4R33 B H4R34 B I4R35 B H4R36 B H4R37 B H4R38 B H4R39 B F3R40 B F2R41 B F1R42 T I1

R28 B E7

R44 B H3R45 B H3R46 B H3R47 B I3

RELAY1 T K8

T1 T K6

TP1 T B5TP2 T B5TP3 T B6TP4 T B6TP5 T B7TP6 T B7

R43 B I3

TP7 T H7TP8 T C5TP9 T C5TP10 T C6

TP12 T C8

TP13 T C8TP14 T C8TP15 T D8TP16 T D8TP17 T D8TP18 T D8TP19 T F8TP20 T F8TP21 T F8TP22 T F8TP23 T I3TP24 T I4TP25 T I6TP26 T I7TP27 T J6TP28 T J5TP29 T J4

TP32 T I3TP33 T G8

TP34 T G8TP20 T F8

U2 B D6U3 B D3U4 B D3U6 B F6U7 B H4U8 B E3

LPF17 B B5 LPF16 B B5

DES SD LC DES SD LC DES SD LC DES SD LC DES SD LC DES SD LC DES SD LC DES SD LC DES SD LC

J19 B C6J20 B D7J21 B F6J22 B C6J23 B D7J24 B F8J25 B F1J26 T F1J27 T G1J28 T E1J29 T F1J30 B A4J31 T F1J32 T F1J33 T E1J34 T D1J35 T E1

JA T F8JF T A6

C20 B E3C21 B H3C22 B H4C23 T J3

D1 B D7D2 B D6

D5 B F5

C15 B F7

D6 B C4D7 B C6D8 B C6

F1 B D8-FSW1 T K5FSW2 T K4FSW3 T K3FSW4 T K2

J7 B E4

J2 B C6J3 B D8J4 B C5J6 B C4

J9 B D1J12 B D1J13 B C2J14 B C1J15 B C1

LPF14 B B5

R2 B C7

R13 B E7

TP11 T C6

TP30 T J4TP31 T I3

U1 B E6

D3 B C6D4 B C5

JP1 B E1

MSD

LSD

1000

's10

0's

10's

1's

A

M2.5 x 14 P/P SCREW5812-2M5FP14S


TRANSMITTER MAIN BOARD COMPONENT LAYOUT - TOP


TITLE: MT-3 TRANSMITTER MAIN BOARD (TOP)

BOARD NO: 43-920917

REV DATE: 06 OCTOBER 2005

A111

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30


TM

DWG No: 01-T-04-04

A


J29

J28

J32

J31

J27

J26

J35

J33

J34


A

J29

J28

J32

J31

J27

J26

J35

J33

J34

A

678

01

32 4

5

9

678

01

32 4

5

9

COMPONENTS NOT INSTALLED

D2

12

24

32

B Z

D B Z

3 1

24

3 1

24

3 1

24

3 1

24

3 1

24

MT-3 AUDIO PROCESSOR BOARD

MT-

3 TX

FR

ON

T P

AN

EL

BO

AR

D

3

1 2

4

3

1 2

4

3

1 2

4

01

3

2

4

8

C

AB

9

D

7

65

F

E

678

01

32 4

5

9

A

JS3

121110987654321

2019181716151413

T1

SPT-196

JS2

JS1

1 2

1ROW X 12PIN1ROW X 9PIN

1ROW X 6PIN

1ROW X 2PIN

RELAY1

EN

A+9

.5V

13.8

VFO

RR

EV

GN

DA

UD

IO IN

C23100nF

FSW4BCD-10

FSW3BCD-10

FSW2BCD-10

FSW1BCD-16

JA1JA2JA3 JA4 JA5

56

4321

12B

R42OPTIONAL

CONN1

JF1

JF3

JF2

A



8

7

6

5

4

3

2

1


TP19 TP20TP22TP21

TP15 TP16TP18TP17

TP12TP13

TP14

TP1 TP2

TP3TP4

TP5TP6

TP8

TP9

TP10

TP11

TP7

TP25

TP26

TP27

TP28

TP29

TP30

TP24TP23

TP33TP34

TP31

TP32

OS-3 RFOUTPUT

OC-3 RFOUTPUT

OST-3H RFOUTPUT

JS3

121110987654321

2019181716151413

JS2

JS1

1 2

56

4321

12B

SYNTHESIZER MODULE



J16 B F6J17 B E7J18 B F5

JS1 T H4 JS2 T E5 JS3 T F2

LPF1 B B8LPF2 B B7LPF3 B B7LPF4 B B7LPF5 B B7LPF8 B B6LPF10 B B6LPF12 B B6

LPF15 B B5




Q11 B I3

R1 B C7





R28 B E7

R44 B H3R45 B H3R46 B H3R47 B I3

RELAY1 T K8

T1 T K6


R43 B I3


TP12 T C8


TP32 T I3TP33 T G8

TP34 T G8TP20 T F8





JA T F8JF T A6

C20 B E3C21 B H3C22 B H4C23 T J3

D1 B D7D2 B D6

D5 B F5

C15 B F7



J7 B E4



LPF14 B B5

R2 B C7

R13 B E7

TP11 T C6

TP30 T J4TP31 T I3

U1 B E6

D3 B C6D4 B C5

JP1 B E1

MSD

LSD

1000

's10

0's

10's

1's

A






TITLE: MT-3 TRANSMITTER MAIN BOARD (BOTTOM)

BOARD NO: 43-920917

REV DATE: 12 DECEMBER 2005DWG No: 01-B-05-03

1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30

ADANIELSELECTRONICS LTD

TM

1234567

J17

Y

X

J14

J24

X YJ15

X YJ13

Y XJ25

Y XJ7

Y XJ18

X

Y

J16

X

Y

J20

X

Y

J23

X

Y

J19

X

Y

J22

Y

X

Y

X

Y

X

J4

J3

J2

J9

J12

J21

J6

A


COMPONENTS NOT INSTALLED A

D4BYD17J

R227k4

D2BYD17J

R9 221kR10100k

R31k00

D1BYD17J

D3BYD17J R6

27k4

R71k00

R827k4

C610nF

C5100nF

U133172

C8100nF

R427k4 R15

10k0

R1810k0

U24081

R1410k0

Q1BC817

R1227k4

R1327k4R11

27k4

D6BYD17J

C310µF16V

C41µF16V

Q9D15N06V

Q8BC807

R2468k1

R2310k0 R21

10K0

D5 BYD

Q5D5P06VQ7

D5P06V

C110µF 35V

R261k00

Q10PZT2222

R2527k4

C21µF35V

R171k00

C1210nF

C1310nF

U6 LP2951

R510R0

R110R0

R3015k0

C154.7µF

C1410nF

M2.5 PRESS NUT

C101 µF

R1610k0

C204.7µF16V

U8MC14536B R39

221K

U733172

R321k00

R3427k4

R3368k1 R31

221k

R38100k

R371k00

R36221k

R3527k4

C21100nF

C22100nF

R471k00

Q11BC807-25

R46221k

R43221k

R44221k

R45221k

R4115K

R4010K

R28N/I

D8BAS

R1910K0

R2982k5

LPF35

LPF34

LPF33

LPF31

LPF30

LPF29

LPF28

LPF27

LPF26

LPF25

LPF24

LPF23

LPF22

LPF21

LPF20

LPF19

LPF18

LPF17

LPF16

LPF15

LPF12

LPF10

LPF8

LPF3

LPF5

LPF4

LPF2

LPF1

LPF14

R2268k1

U4MMAD1108

U3MMAD1108

R2068k1

D7BAS

C710nF

Q4BC817

Q6BC817

Q3BC817

J21

A

J17

Y

X

J14

J24

X YJ15

X YJ13

Y XJ25

Y XJ7

Y XJ18

X

Y

J16

X

Y

J20

X

Y

J23

X

Y

J19

X

Y

J22

Y

X

Y

X

Y

X

J4

J3

J2

J9

J12

J6

LPF32

A

M2.5 x 10 P/P SCREW (2)w/ M2.5 HEX NUT

JP1

A

F1

CONN1F/48 MALE

VHF 8W AMPLIFIER

Default FM



J16 B F6J17 B E7J18 B F5

JS1 T H4 JS2 T E5 JS3 T F2LPF1 B B8LPF2 B B7LPF3 B B7LPF4 B B7LPF5 B B7LPF8 B B6LPF10 B B6LPF12 B B6

LPF15 B B5




Q11 B I3

R1 B C7





R28 B E7

R44 B H3R45 B H3R46 B H3R47 B I3

RELAY1 T K8

T1 T K6


R43 B I3


TP12 T C8


TP32 T I3TP33 T G8

TP34 T G8TP20 T F8





JA T F8JF T A6

C20 B E3C21 B H3C22 B H4C23 T J3

D1 B D7D2 B D6

D5 B F5

C15 B F7



J7 B E4



LPF14 B B5

R2 B C7

R13 B E7

TP11 T C6

TP30 T J4TP31 T I3

U1 B E6

D3 B C6D4 B C5

JP1 B E1

A

STANDARD / LOW FREQUENCY

J6J7

NOT INSTALLED'Y' POSITION

INSTALLED'X' POSITION

DESIG STD VERSION LOW FREQ.AM/FM MODULATION SELECT

J25 'Y' POSITION 'X' POSITIONDESIG AM FM

8

7

6

5

4

3

2

1


R261k00

R1127k4

Y XJ25

M2.5 x 14 P/P SCREW (2)5812-2M5FP14S

F1 (3A FUSE OPTIONAL)

TRANSMITTER MAIN BOARD COMPONENT LAYOUT - BOTTOM



TRANSMITTER MAIN BOARD SCHEMATIC DIAGRAM

DESIG STD VERSION LOW FREQ.J6 Not Installed InstalledJ7 'Y' Position 'X' PositionJ18 'Y' Position 'X' Position

STANDARD / LOW FREQUENCY

DESIG AM FMJ25 'Y' Position 'X' Position

AM/FM MODULATION SELECT TABLE

DESIG MODE 1 MODE 2 MODE 3 MODE 4J6 Not Installed Installed Installed InstalledJ7 'Y' Position 'X' Position 'X' PositionJ18 'X' Position 'Y' Position 'X' Position

AM/FM STANDBY MODES

DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LC DES LCC1 S13 C20 I11 F1 T13 J12 S12 J25 N7 J30-B18 C6 J30-D12 C10 J30-Z6 C2 J30-Z32 V3 LPF10 C11 LPF25 U7 Q3 P11 R4 F10 R17 O4 R31 I11 R44 M11 TP5 I2 TP18 L7 TP31 K11 U2c H10C2 S13 C21 I11 J13 T11 J26 K12 J30-B20 C3 J30-D14 V4 J30-Z8 C11 J31 M12 LPF12 C8 LPF26 C13 Q4 P14 R5 E12 R18 O11 R32 I11 R45 M11 TP6 N2 TP19 L8 TP32 K11 U2d G11C3 D2 C22 J11 FSW1 S2 J14 U11 J27 K12 J30-B22 C6 J30-D16 V4 J30-Z10 C8 J32 M12 LPF14 C12 LPF27 C7 Q5 Q13 R6 E11 R19 P14 R33 I11 R46 M11 TP7 Q13 TP20 L6 TP33 L6 U3 R3C4 E2 C23 K11 FSW2 S2 J15 U11 J28 M12 J30-B24 C13 J30-D18 V4 J30-Z12 C14 J33 H11 LPF15 C14 LPF28 U8 Q6 P12 R7 F12 R20 P13 R34 J11 R47 M11 TP8 Q10 TP21 L8 TP34 L5 U4 T3C5 G11 FSW3 T2 J16 J5 J29 M12 J30-B26 V11 J30-D20 V7 J30-Z14 C12 J34 I10 LPF16 C2 LPF29 U8 Q7 P12 R8 G12 R21 P12 R35 J11 TP9 Q8 TP22 L7 TP31 K11 U6 G8C6 G11 D1 F10 FSW4 T2 J17 J5 J30-B2 V12 J30-B28 V4 J30-D22 V7 J30-Z16 V5 J35 N11 LPF17 C2 LPF30 U6 Q8 F13 R9 F11 R22 P12 R36 J12 RELAY1 C11 TP10 S7 TP23 S6 TP32 K11 U7a K11C7 E12 D2 F8 J18 Q8 J30-B4 C5 J30-B30 V3 J30-D24 V8 J30-Z18 C6 LPF18 C6 LPF31 U6 Q9 D13 R10 F12 R23 N13 R37 K11 TP11 P11 TP24 S6 TP33 L6 U7b I11C8 F13 D3 E11 J2 E9 J19 E5 J30-B6 C2 J30-B32 V3 J30-D26 V8 J30-Z20 C7 LPF1 U12 LPF19 C6 LPF32 U7 Q10 U12 R11 K9 R24 E14 R38 K12 T1 F6 TP12 L10 TP25 O10 TP34 L5 U8 L11C10 D3 D4 E12 J3 E9 J20 E6 J30-B8 C10 J30-D2 C12 J30-D28 V6 J30-Z22 V8 LPF2 U13 LPF20 C6 LPF33 C8 Q11 N11 R12 G10 R25 T12 R39 K11 TP13 N9 TP26 H11C12 H4 D5 P13 J4 E12 J21 G8 J30-B10 C8 J30-D4 C12 J30-D30 V6 J30-Z24 C7 LPF3 U4 LPF21 C7 LPF34 U11 R13 G10 R26 T12 R40 K12 TP1 H3 TP14 N5 TP27 G9 U1a F10C13 J3 D6 Q14 J6 Q14 J22 G5 J30-B12 C14 J30-D6 C12 J30-D32 V7 J30-Z26 V11 LPF4 C5 LPF22 C3 LPF35 U11 R1 E9 R14 H12 R28 H6 R41 K12 TP2 J3 TP15 N9 TP28 G12 U1b F11C14 H9 D7 E9 J7 G8 J23 G6 J30-B14 C12 J30-D8 C10 J30-Z2 V13 J30-Z28 C8 LPF5 C5 LPF23 U8 R2 E8 R15 O14 R29 H9 R42 K12 TP3 K4 TP16 N6 TP29 Q12 U2a K9C15 I9 D8 E12 J9 D3 J24 N6 J30-B16 V5 J30-D10 C10 J30-Z4 C5 J30-Z30 V3 LPF8 C10 LPF24 U7 Q1 O11 R3 F10 R16 Q8 R30 H9 R43 M11 TP4 K3 TP17 L7 TP30 Q12 U2b G13

COMPONENT LOCATION TABLE


TM

VICTORIA B.C.

DWG No: 01-S-03-01

XIWV IIUT IISR IIQP IION IIML IIKJ IIIH IIGF IIED IICIBA I

15

15

14

__

13

12

__

__

11

__

10

__

9

8

__

__

7

__

6

5

__

__

4

3

__

__

2

__

1

__

XIWV IIUT IISR IIQP IION IIML IIKJ IIIH IIGF IIEIDC IB IA I

1

__

2

__

3

__

4

__

5

__

6

__

7

__

8

__

9

__

10

__

11

__

12

__

13

__

14

__

(Most Significant Bit)

(Least Significant Bit)

5

DWG REV DATE: 28 APRIL 2004

DWN BY: MIKE G

REVISED BY: NIKKI B

Default FM

UNUSED REFERENCE DESIGNATORS

REV: 1.7BOARD No: 43-920917

APRVD:DATE: 8 APRIL 1992

TITLE: MT-3 TRANSMITTER BOARD SCHEMATIC DIAGRAM

Q2U5R27

LPF11-LPF13LPF6-PLF7C17-C19J10, J11J1,J5,J8C9,C11,C16

TP34 F1, FSW4LPF35

RELAY1T1J35

U8Q11, R47C23, D8

HIGHEST REFERENCE DESIGNATORS

Y

X

NC

NC

NC

X

TIME OUT TIMER

APPROX 0.8 VDC

JF3-4

JF3-3

JF3-2

JF3-1

JP1-7

X

Y

X

Y

X

Y

X

Y

X

Y

JP1-5JP1-4JP1-6JP1-2JP1-1JP1-3

X Y

Y

X

Y

X Y XY

UNDER U6

X

Y

X

Y

XY

JA5-1

JA5-2

JA5-3

JA5-4

JA2-4

JA3-1

JA4-2

JA3-2

JA4-4

JA1-4 JA3-3

JF2-3

JF2-4

JF1-4

JA3-4

JA2-3

JA4-3

JA4-1

JA2-1

JA2-2

JA1-1

JA1-2

JA1-3

JF1-1

JF1-3

JF2-2

JF1-2

JF2-1

FRONT PANELN CONNECTOR

BACKPLANECONNECTOR

LPF16

LPF17

LPF22

LPF5

LPF4

LPF19

LPF18

LPF20

LPF27

LPF21

LPF33

LPF12

LPF8

LPF10

LPF14

LPF26

LPF15

Z12

B12TX STANDBY

B24PTT OUTPUT

Z14

B14PTT NTO

D4 NC

D6 NC

D2 NC

B8RLY POS

D8 NC

D10 NC

D12 NC

Z10

B10PTT WTO

Z28DIRECT MODINPUT

Z20SQL FLATINPUT

Z24SUBTONEINPUT #2

B22SUBTONEINPUT #1

Z18BALANCEDINPUT #1

B18BALANCEDINPUT #2

Z4MIC IN

B4MIC OUT

B20SQL DE-EMPINPUT

Z6

B6

+9.5V CONTINUOUS

B30 GROUND

B32 GROUND

Z32 GROUND

D14 IMC1

D16 IMC2

D18 IMC3

B16NC

Z16NC

B28 RX MONITOR

D30 RX DATA IN

D28 TX DATA OUT

D32 BOOTSTRAP

D20 CHANNEL SEL 0

D22 CHANNEL SEL 1

D24 CHANNEL SEL 2

D26 CHANNEL SEL 3

Z22 TX AUDIO CONTROL

Z26 VSWR REVERSE

B26FORWARD POWERFAIL INDICATOR

B2

+10 TO +17 VOLTS+13.8 VDC NOMINAL

Z2LPF2

LPF1

LPF34

LPF35

LPF23

LPF29

LPF28

LPF25

LPF24

LPF32

LPF31

LPF30

C310uF

C41.0uF

TP5

TP2

TP4

TP3

TP1

C1310nF

TP6

C101.0uF

J9

J16

J17

TP20

TP18

TP22

TP17

TP19

TP21

R28NOT INSTALLED

R227K4

D2BYD17J

D1BYD17J

1 9 87

4 3210

RELAY1

J4

D7BAS16

R110R0

R427K4

R31K0

TP27

23

1

U1aMC33172

4

56

78

U1 bMC33172

D3BYD17J

R627K4

D4BYD17J

D8BAS16

R510R0

R71K0

R827K4

C610nF

R10100K0

R9221K0

TP26

8 9

10

U2 cMC14081

13

1211

U2 dMC14081

1

23

U2 aMC14081

G

D

S

Q9D15N06V E

BC

Q8BC807-25

R1810K0

TP11

EB

C

Q1BC817-25

EB

C

Q3BC817-25

EB

CQ4BC817-25

D5BYD17J

D6

BYD17JJ6

TP7G

DS

Q5D5P06V

J21

R3015K0

9.5V

C1410nF

R2982K5

C154.7uF

J15J13

J14

EB

CQ10PZT2222A

R261K0

R2527K4J12

TP8

TP15

TP9

TP16

TP14

R171K0

J18

R1610K0

TP23

TP24

TP10

J7

TO ALL 9.5V PTT SWITCHEDSUPPLY POINTS

MICROPHONE INPUT

BALANCEDINPUT

+9.5V

+8.0V SWITCHED

TONE/DIGITALINPUT

AUDIO OUTPUT

SUBTONE #1 INPUT

SUBTONE #2 INPUT

DIRECT MODULATIONINPUT

AUDIO

SUBTONE #2OUTPUT

TOTINPUT

TOTOUTPUT

GND GND

MT-3 AUDIOPROCESSOR

13.8 V

QUALIFIEDPTT

PTT

GND

CONTROL

2

1

6

4

3

T1AUDIO XFMR

C1210nF

R1327K4

R1227K4

R1127K4

R19

10K0

R15

10K0

R14

10K0

R23

10K0

R2468K1

C5100nF

C710nF

J20

J22

J23

J24

J19

J25

RF INRF OUT

+9.5V+13.8V ENA GND FOR REV

OR

MT-3 VHF/UHF AMPLIFIER MODULE

AUDIOIN

LPF3

Z8RLY NEG

TP30

G

DS

Q7D5P06V

R2110K0

C22100nF

R39221k

100nFC23

R44221k

R45221k

R46221k

R43221k

R4115k0

R3527k4R33

68k1

R31221k

R321k00

R36221k

R3427k4

R38100k

R371k00

R42OPT

C21100nF

32

8

4

1

U7MC33172

a

BC807-25Q11

SET

RESET

IN1

OUT1

OUT2

BYP

CLK INH

VSS

VDD

MONO

OSC INH

DEC

D

C

B

A

12345678

161514131211109

U8MC14536B

TP25

56

7

bU7MC33172

C204.7uF

R471k00

R4010k0

TO ALL TOT 9.5V

TP12

TP31 TP32

TP13

TP33

TP34

Z30 GROUND

13572468

9 11 13 15 10 12 14 16

MMAD1108U3

75318642

15 13 11 9 16 14 12 10

MMAD1108U4

J2

J3

TO ALL 13.8V SUPPLY POINTS

C110uF

C21.0uF

TO ALL 9.5V SWITCHEDSUPPLY POINTS

R2068K1 OPTIONAL

F1

R2268K1

EB

CQ6BC817-25

TP29


+9.5V INPUT +9.5V OUTPUT

LED ENA

GROUNDMIC PTT WTO

MIC PTT NTO

MIC AUDIO

MT-3 FRONT PANEL BOARD

RX AUDIOSPARE

+13.8V

GROUND

RX MON

8

F 10

2

3

4

5

679

A

B

C

D

E

MSD

FSW1BCD-16

5

01

2

3

46

7

8

9

BCD-10FSW2

5

01

2

3

46

7

8

9

BCD-10FSW3

5

01

2

3

46

7

8

9

BCD-10FSW4

C8100nF

5

64

14

7

U2 bMC14081

TP28

J29J28 J32J31

J33

J34

J35

J26

J27

P1-18 P1-20 P1-12 P1-19 P1-11 P2-2 P1-17 P1-9

P3-2

P3-1

P2-5

P1-10

P1-7

P1-3

P2-3P1-16P1-8P1-15P1-14P1-6P1-13P1-5P1-4

P1-2 P1-1 P2-1 P2-4 P2-6

RFOUTPUT

REFERENCEINPUT

OS-3 SYNTHESIZER

9.5V PTT SWITCHED9.5V SWITCHED

Vin Error Sd Gnd

VoutSense

5V Tap FB

8534

1267

LP2951U6

9.5V

9.5V

9.5V

9.5V

9.5V

9.5V

TOT 9.5V

TOT 9.5V

TOT 9.5V

9.5V

9.5V

9.5V

9.5V

13.8V

9.5V SWITCHED

9.5V PTT SWITCHED

13.8V

9.5V

13.8V

PTT

TOT INPUT

TOT OUTPUT

QUALIFIED PTT

QUALIFIED PTT

2.2 Vdc

9.4Vdc

2.9 Vdc

2.9Vdc



FRONT PANEL BOARD COMPONENT LAYOUT FRONT PANEL BOARD SCHEMATIC DIAGRAM

TITLE:

DATE:

DWG No.:

BOARD No.:

DWN BY: APRVD:

DWG REV DATE:

REVISED BY:

REV:


TM

VICTORIA BC.SW1

PF3MIC

J2D1C1



----------

-----

-----

-----

----------

-----

-----

----------

-----

03 JUL 03

SHANE AEBISCHER

1.243-921212

M. GAUBE07 APRIL 92

MT-3 FRONT PANEL BOARD SCHEMATIC DIAGRAM

01-S-01-01

X

Y

PF3-3

PF3-4

PF3-1

PF3-2

X

PF1-4

PF1-1

PF1-2

PF1-3

PF2-2

PF2-3

PF2-4

PF2-1

MIC-2

MIC-4

MIC-3

MIC-1

Y

KEYED

NORM

D1

J1

C1N/I

1

2

3

4

MIC

PF2

4

2

1

3

PF3

1

2

3

4

5

6

7

8P1

J2

F

E

D

C

B

A

SW1

1

2

3

4

PF1

+9.5V IN

LED ENA

MIC PTT NTO

MIC PTT WTO

MIC INPUT

MIC INPUTMIC PTT

MIC PTT

RX MONRX MON

+9.5V OUT

+9.5V OUT

RX AUDIO

RX AUDIO

+13.8V

+13.8V

SPARESPARE

DATE: 20 NOV 97

TITLE: MT-3 FRONT PANEL BOARD

BOARD NO: 43-921212

REV DATE: 28 JUL 04DWG No: 01-T-02-01

1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30

B

+


TM A

4

3

2

1

4

3

2

1

4

3

2

1

A

P1 D1

PF3 PF2PF1

MIC

SW1c b a

f e d

J1J2

Y X

Y

X

Solder Jumper On Solder Side Of PCB.

Factory Installed Solder Jumper.

A

21436587

12

34

KEY

ED

NO

RM



AUDIO PROCESSOR BOARD COMPONENT LAYOUT

BOTTOM SIDE

TOP SIDE

1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30


TM A

DATE: 27 MAR 00

TITLE: FM TX AUDIO PROCESSOR BOARD

BOARD NO: 43-911923

REV DATE: 05 DECEMBER 2005DWG No: 01-T-06-01

A

- COMPONENTS NOT INSTALLED

A

- JUMPERS INSTALLED

JU41JU4

JU17 JU36

JU2X Y

X

Y

JU14Y X

JU20X Y

JU27X Y

JU5

Y

X

JU1X Y

JU15X Y

JU12X Y

JU9

X

YX

JU39Y X

JU34

Y

X

JU21X Y

XJU25

Y

XJU19

X

Y

JU22Y

X

JU6

JU8

JU32

JU31

JU18

JU37

JU38

JU29

JU7

JU23

JU28

JU13

JU10

JU16

JU33

JU11

JU42X Y

JU43

Y

X

JU44

JU45

JU26JU3Y

Y JU24

JU35

Y

X

Y

X

JU35

A

C84.7µF

P1

C264.7µF

R73N/I

R618k2

R418k2

R560R0

C510nF

R10R0

C41µF

R51M0

R64100k

R30604R0

R74N/I

R72k21

P2

C1010nF

R112k21

R1049k9

R82k21

R57N/I

R4049k9 R52

100k

R26SEL

R25SEL

R4916k2

R1510k0

C2010nFC36

330nF

R1310k0

R20SEL

R28SEL

R81SEL

P4

C18100nF

C1710nF

R17SEL

R18SEL

R3449k9

C23330pF

R16100k0C41

10nF

R45N/I

R440R00

R53N/I

R32SELR54

SEL

C121.0nF

R5049k9

C2410nF

C454.7µF

R351K00

R12N/I

R7949k9

R2249k9

R2149k9

R5549k9

C61µF

C211µF

P3

R580R00

R720R00

R3749k9

R7720k0

R7510k0

Q1BC817-25

R683k48

R692k00

R6616k2

R6756k2

C34.7µF

R635K0

U4LTC1569-6

R425k0

R25K0

R315K0

R385K0

R48100K0

R14N/I (5K0)

R2950k0

U3MC33174

R3650k0

FB1

U5TC4S66F

U1

SA571D

C1347uF

C2947uF

C3147uF

C34SELU2

MC33174

U6TC4S66F

R8350k0

C484.7µF

C504.7µF

C42680nF

C7

680nF

R23SEL

R24SEL

R8510k0

R7810k0

C4910nF

R8610k0

C27100nF

R949k9 R65

100k

R715k11

R464k53

C1410nF

C43150pF R84

10k0

R8210k0

C19330nF

R4311k8

R47100k R3

100k

R33100k

R5920k

R41137k

R5110k0

R6215k4

R7616k2

C11µF

C301µF

C91µF

C21µF

C251µF

C351µF

C39680nF

R3915k4

R6018k2

R6118k2R80

27k4

C284.7µF

C511µF

C161.0µF

C461.0µF

C471.0µFC33

1.0µF

C2210nF

R7010k0

C44330pF

R8750K0

C401.0µF

R8849k9

C52150pF

C534.7µF

C54100nF

C55100nF

C5633nF

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

R89100R

Note 1

A

R27SEL

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

A

+

A

- COMPONENTS ARE SELECT INSTALLED

C38

3.3nF

P2 P3P4

C373.3nF

C32N/I(22nF)

P1

P5

P8

P6

P7

C15

3.3nFR19SEL

A

C341.0 uF

TH-R27SEL

P10

P11

TP3

TP11TP4

TP12

TP7

TP9

TP6

TP1

TP10

TP2

P9 P5P8

P6

P12

P7

TP13

TP5

TP14

MICROPHONEINPUT LEVEL

CONTROL

BALANCEDINPUT LEVEL

CONTROL

BALANCEDCOMPRESSION

CONTROL

MICROPHONECOMPRESSION

CONTROL

AUXILIARYINPUT LEVEL

CONTROL

4.0VVOLTAGEADJUST

SUBTONE 1 INPUT LEVEL

CONTROL

DEVIATIONCONTROL

TCXODC LEVELADJUST

TCXOMODULATION

LEVEL ADJUST

INPUTDC LEVELADJUST

A

TP8

Note 1:

For VT-3H035 and VT-3H045 Low Band VHF Transmitters only;C44 is NOT INSTALLED and there are trace cuts.

30 AWG WIRE JUMPER Installed for Dual Port Modulation Only

1

2

A B C D E F G H I J

3

4

K L M N O P Q R S T

R1 J1R2 K3R3 H1R4 J1R5 I2R6 J2R7 H2R8 E2R9 E2R10 H2R11 G2R12 A1R13 F1R14 O3R15 F1R16 E1R17 D2R18 E2R19 Q4R20 E1R21 B2R22 A2R23 C1R24 C1R25 D2

R76 I1R77 C2R78 D1R79 C2R80 A1R81 C1R82 G2R83 S3R84 E1R85 C1R86 D1R87 M4R88 E2R89 D1

C51 F2C52 G1C53 N4C54 G2C55 A2C56 B2

FB1 K4

JU1 F1JU2 H2JU3 C1JU4 H1JU5 G1JU6 A2JU7 A1JU8 A2JU9 F2JU10 F1JU11 I1JU12 F1JU13 F1JU14 G2JU15 F1JU16 G1JU17 I2JU18 B2JU19 B1JU20 H1JU21 C2JU22 A1JU23 D1JU24 E2JU25 B1

JU26 E1JU27 H1JU28 D2JU29 B2JU30 N/AJU31 B1JU32 A2JU33 G2JU34 D2JU35 D2JU36 J2JU37 D2JU38 C1JU39 D1JU40 N/AJU41 C1JU42 H2JU43 D2JU44 B2JU45 B2

P1 L4P2 O4P3 S4P4 R4P5 Q3P6 T4P7 Q4P8 T3P9 A1P10 A1P11 B1P12 A1

Q1 C2

R26 C2R27 P3R28 E1R29 S3R30 J2R31 M3R32 C1R33 H1R34 D1R35 A1R36 T3R37 C2R38 N3R39 I1R40 F2R41 I1R42 R3R43 G1R44 D1R45 D1R46 F2R47 G1R48 O3R49 G1R50 B1

R51 I1R52 F2R53 D1R54 C1R55 B2R56 J1R57 G2R58 B1R59 I1R60 H1R61 H1R62 J1R63 N3R64 I2R65 G2R66 A2R67 A2R68 A2R69 A1R70 H2R71 G1R72 B1R73 I2R74 I2R75 C2

C26 H1C27 B2C28 S4C29 Q3C30 I1C31 R4C32 M4C33 S4C34 S3C35 I1C36 E2C37 P4C38 O4C39 G1C40 T4C41 D1C42 M4C43 E1C44 E1C45 B1C46 T4C47 T4C48 P3C49 D2C50 P3

COMPONENT LOCATION TABLEDES LOC DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC

C1 I1C2 J1C3 O3C4 J1C5 J2C6 A2C7 L4C8 J2C9 I1C10 G2C11 N/AC12 C1C13 K4C14 F1C15 L4C16 M4C17 E1C18 F2C19 H2C20 G2C21 A1C22 H2C23 E1C24 C1C25 H1

DES LOCU1 L3U2 N3U3 R3U4 T3U5 R3U6 S3

DES LOC

TP1 F1TP2 B1TP3 I2TP4 J1TP5 C1TP6 G2TP7 D2TP8 D1TP9 C1TP10 D1TP11 I1TP12 G1TP13 H2TP14 C1

DES LOC

BOTTOM SIDE

TOP SIDE

1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30


TM A

DATE: 27 MAR 00


BOARD NO: 43-911923


A


A

- JUMPERS INSTALLED

JU41JU4

JU17 JU36

JU2X Y

X

Y

JU14Y X

JU20X Y

JU27X Y

JU5

Y

X

JU1X Y

JU15X Y

JU12X Y

JU9

X

YX

JU39Y X

JU34

Y

X

JU21X Y

XJU25

Y

XJU19

X

Y

JU22Y

X

JU6

JU8

JU32

JU31

JU18

JU37

JU38

JU29

JU7

JU23

JU28

JU13

JU10

JU16

JU33

JU11

JU42X Y

JU43

Y

X

JU44

JU45

JU26JU3Y

Y JU24

JU35

Y

X

Y

X

JU35

A

C84.7µF

P1

C264.7µF

R73N/I

R618k2

R418k2

R560R0

C510nF

R10R0

C41µF

R51M0

R64100k

R30604R0

R74N/I

R72k21

P2

C1010nF

R112k21

R1049k9

R82k21

R57N/I

R4049k9 R52

100k

R26SEL

R25SEL

R4916k2

R1510k0

C2010nFC36

330nF

R1310k0

R20SEL

R28SEL

R81SEL

P4

C18100nF

C1710nF

R17SEL

R18SEL

R3449k9

C23330pF

R16100k0C41

10nF

R45N/I

R440R00

R53N/I

R32SELR54

SEL

C121.0nF

R5049k9

C2410nF

C454.7µF

R351K00

R12N/I

R7949k9

R2249k9

R2149k9

R5549k9

C61µF

C211µF

P3

R580R00

R720R00

R3749k9

R7720k0

R7510k0

Q1BC817-25

R683k48

R692k00

R6616k2

R6756k2

C34.7µF

R635K0

U4LTC1569-6

R425k0

R25K0

R315K0

R385K0

R48100K0

R14N/I (5K0)

R2950k0

U3MC33174

R3650k0

FB1

U5TC4S66F

U1

SA571D

C1347uF

C2947uF

C3147uF

C34SELU2

MC33174

U6TC4S66F

R8350k0

C484.7µF

C504.7µF

C42680nF

C7

680nF

R23SEL

R24SEL

R8510k0

R7810k0

C4910nF

R8610k0

C27100nF

R949k9 R65

100k

R715k11

R464k53

C1410nF

C43150pF R84

10k0

R8210k0

C19330nF

R4311k8

R47100k R3

100k

R33100k

R5920k

R41137k

R5110k0

R6215k4

R7616k2

C11µF

C301µF

C91µF

C21µF

C251µF

C351µF

C39680nF

R3915k4

R6018k2

R6118k2R80

27k4

C284.7µF

C511µF

C161.0µF

C461.0µF

C471.0µFC33

1.0µF

C2210nF

R7010k0

C44330pF

R8750K0

C401.0µF

R8849k9

C52150pF

C534.7µF

C54100nF

C55100nF

C5633nF

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

R89100R

Note 1

A

R27SEL

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

A

+

A


C38

3.3nF

P2 P3P4

C373.3nF

C32N/I(22nF)

P1

P5

P8

P6

P7

C15

3.3nFR19SEL

A

C341.0 uF

TH-R27SEL

P10

P11

TP3

TP11TP4

TP12

TP7

TP9

TP6

TP1

TP10

TP2

P9 P5P8

P6

P12

P7

TP13

TP5

TP14


CONTROL

BALANCEDINPUT LEVEL

CONTROL

BALANCEDCOMPRESSION

CONTROL


CONTROL


CONTROL

4.0VVOLTAGEADJUST


CONTROL

DEVIATIONCONTROL

TCXODC LEVELADJUST

TCXOMODULATION

LEVEL ADJUST

INPUTDC LEVELADJUST

A

TP8

Note 1:



1

2

A B C D E F G H I J

3

4

K L M N O P Q R S T



C51 F2C52 G1C53 N4C54 G2C55 A2C56 B2

FB1 K4




Q1 C2







DES LOC


DES LOC

BOTTOM SIDE

TOP SIDE

1

11

21

2

12

22

3

13

23

4

14

24

5

15

25

6

16

26

7

17

27

8

18

28

9

19

29

10

20

30


TM A

DATE: 27 MAR 00


BOARD NO: 43-911923


A


A

- JUMPERS INSTALLED

JU41JU4

JU17 JU36

JU2X Y

X

Y

JU14Y X

JU20X Y

JU27X Y

JU5

Y

X

JU1X Y

JU15X Y

JU12X Y

JU9

X

YX

JU39Y X

JU34

Y

X

JU21X Y

XJU25

Y

XJU19

X

Y

JU22Y

X

JU6

JU8

JU32

JU31

JU18

JU37

JU38

JU29

JU7

JU23

JU28

JU13

JU10

JU16

JU33

JU11

JU42X Y

JU43

Y

X

JU44

JU45

JU26JU3Y

Y JU24

JU35

Y

X

Y

X

JU35

A

C84.7µF

P1

C264.7µF

R73N/I

R618k2

R418k2

R560R0

C510nF

R10R0

C41µF

R51M0

R64100k

R30604R0

R74N/I

R72k21

P2

C1010nF

R112k21

R1049k9

R82k21

R57N/I

R4049k9 R52

100k

R26SEL

R25SEL

R4916k2

R1510k0

C2010nFC36

330nF

R1310k0

R20SEL

R28SEL

R81SEL

P4

C18100nF

C1710nF

R17SEL

R18SEL

R3449k9

C23330pF

R16100k0C41

10nF

R45N/I

R440R00

R53N/I

R32SELR54

SEL

C121.0nF

R5049k9

C2410nF

C454.7µF

R351K00

R12N/I

R7949k9

R2249k9

R2149k9

R5549k9

C61µF

C211µF

P3

R580R00

R720R00

R3749k9

R7720k0

R7510k0

Q1BC817-25

R683k48

R692k00

R6616k2

R6756k2

C34.7µF

R635K0

U4LTC1569-6

R425k0

R25K0

R315K0

R385K0

R48100K0

R14N/I (5K0)

R2950k0

U3MC33174

R3650k0

FB1

U5TC4S66F

U1

SA571D

C1347uF

C2947uF

C3147uF

C34SELU2

MC33174

U6TC4S66F

R8350k0

C484.7µF

C504.7µF

C42680nF

C7

680nF

R23SEL

R24SEL

R8510k0

R7810k0

C4910nF

R8610k0

C27100nF

R949k9 R65

100k

R715k11

R464k53

C1410nF

C43150pF R84

10k0

R8210k0

C19330nF

R4311k8

R47100k R3

100k

R33100k

R5920k

R41137k

R5110k0

R6215k4

R7616k2

C11µF

C301µF

C91µF

C21µF

C251µF

C351µF

C39680nF

R3915k4

R6018k2

R6118k2R80

27k4

C284.7µF

C511µF

C161.0µF

C461.0µF

C471.0µFC33

1.0µF

C2210nF

R7010k0

C44330pF

R8750K0

C401.0µF

R8849k9

C52150pF

C534.7µF

C54100nF

C55100nF

C5633nF

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

R89100R

Note 1

A

R27SEL

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

A

+

A


C38

3.3nF

P2 P3P4

C373.3nF

C32N/I(22nF)

P1

P5

P8

P6

P7

C15

3.3nFR19SEL

A

C341.0 uF

TH-R27SEL

P10

P11

TP3

TP11TP4

TP12

TP7

TP9

TP6

TP1

TP10

TP2

P9 P5P8

P6

P12

P7

TP13

TP5

TP14


CONTROL

BALANCEDINPUT LEVEL

CONTROL

BALANCEDCOMPRESSION

CONTROL


CONTROL


CONTROL

4.0VVOLTAGEADJUST


CONTROL

DEVIATIONCONTROL

TCXODC LEVELADJUST

TCXOMODULATION

LEVEL ADJUST

INPUTDC LEVELADJUST

A

TP8

Note 1:



1

2

A B C D E F G H I J

3

4

K L M N O P Q R S T



C51 F2C52 G1C53 N4C54 G2C55 A2C56 B2

FB1 K4




Q1 C2







DES LOC


DES LOC

Select Component Table

Ref. Desig. U

T-3/

420-

SX

CX

00

UT-

3/46

0-S

XC

X00

UT-

3/81

5-S

XC

300

UT-

3/86

0-S

XC

300

UT-

3/93

0-S

XB

300

UT-

3/95

0-S

XB

300

VT-

3/14

0-S

XA

X00

VT-

3/16

0-S

XA

X00

VT-

3H03

5-S

XA

300

VT-

3H04

5-S

XA

300

C44 330pF 330pF 330pF 330pF 330pF 330pF 330pF 330pF N/I N/I

R17 13K3 13K3 N/I 2K00 N/I N/I 36K5 11K3 11K8 5K11

R18 N/I N/I N/I N/I N/I N/I 36K5 N/I 3K01 4K75

R19 N/I N/I N/I N/I N/I N/I N/I N/I N/I N/I

R20 6K81 6K81 6K81 604R 6K81 6K81 15K0 11K8 2K21 3K01



R25 18K2 18K2 1K00 1K00 1K00 1K00 18K2 11K8 1K00 1K00

R26 8K25 8K25 N/I N/I N/I N/I 18K2 11K8 N/I N/I

R27 10K 10K N/I N/I N/I N/I 10K 10K 300R 300R

R28 N/I N/I 4K53 N/I 4K53 4K53 N/I N/I 1K50 1K00



R54 100R 100R N/I N/I N/I N/I 100R 100R N/I N/I

R81 51K1 51K1 N/I N/I N/I N/I N/I N/I N/I N/I

R89 to JU35 install install N/I N/I N/I N/I install install N/I N/I

JU3 Y Y Y Y Y Y Y Y Y Y

JU24 Y Y X Y X X Y Y Y Y

JU29 install install N/I N/I N/I N/I install install N/I N/I

JU32 install install N/I N/I N/I N/I install install N/I N/I

JU44 install install N/I N/I N/I N/I N/I N/I install install

N/I - Not Installed



AUDIO PROCESSOR BOARD SCHEMATIC DIAGRAM A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

K

K

L

L

M

M

N

N

O

O

P

P

1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

1 10 0

R1 C2R2 C3R3 C8R4 F4R5 D5R6 E4R7 G4R8 G3R9 G3R10 G5R11 H6R12 N8R13 H1R14 H2R15 H2R16 J5R17 J4R18 J4R19 L5R20 K5R21 L7R22 L7R23 L5R24 L5R25 L5

R76 E5R77 L7R78 N8R79 K7R80 N8R81 O8R82 F6R83 N8R84 I4R85 K4R86 N6R87 D9R88 N7R89 O7

C51 B6C52 D8C53 I2C54 J2C55 L8C56 O7

FB1 B3

JU1 G3JU2 G4JU3 L5JU4 B8JU5 E6JU6 P5JU7 K6JU8 O6JU9 I6JU10 D6JU11 C5JU12 B5JU13 B8JU14 H6JU15 H2JU16 H7JU17 C5JU18 L7JU19 J6JU20 C8JU21 K7JU22 N5JU23 N7JU24 K5JU25 L7

JU26 I8JU27 D8JU28 B8JU29 O6JU30 N/AJU31 L6JU32 O7JU33 F6JU34 M7JU35 N8JU36 D2JU37 P8JU38 O7JU39 N8JU40 N/AJU41 O8JU42 D8JU43 B9JU44 O7JU45 O7

P1-1 A4P1-2 A5P1-3 A3P1-4 A3P2-1 A6P2-2 A7P2-3 A4P2-4 A4P3-1 P6P3-2 J9P3-3 A4P3-4 A9P4-4 A7P4-1 A8P4-3 A9P4-2 P8P9 N5P10 N5P11 M5P12 M6

Q1 J7

R26 L5R27 K4R28 K5R29 K6R30 B5R31 C5R32 O8R33 C8R34 N7R35 N7R36 N7R37 N7R38 F4R39 D3R40 H7R41 D3R42 E7R43 H7R44 O8R45 O9R46 B6R47 D8R48 E6R49 E6R50 M7

R51 C4R52 G6R53 O8R54 P8R55 J7R56 D2R57 F6R58 K7R59 D3R60 F3R61 E3R62 D4R63 F3R64 D5R65 G5R66 O5R67 O5R68 M5R69 M5R70 C9R71 I1R72 K6R73 E5R74 E3R75 K8

C26 F3C27 O7C28 M7C29 B9C30 D4C31 B9C32 F6C33 O6C34 P8C35 D3C36 G3C37 G3C38 H6C39 H7C40 O6C41 O8C42 E3C43 J5C44 N7C45 M6C46 O6C47 O7C48 G1C49 K4C50 J4


C1 D3C2 E4C3 I1C4 D2C5 C3C6 O5C7 E5C8 F4C9 D4C10 F7C11 N/AC12 O7C13 D2C14 E6C15 G4C16 F6C17 I4C18 G1C19 G5C20 H2C21 M5C22 C9C23 N7C24 N6C25 E2

DES LOC

U1a D2U1b D4U2a I2U2b D8U2c F6U2d G6U3a J4U3b L4U3c O8U3d N6U4 N5U5 M7U6 M8

DES LOC

TP1 I2TP2 E7TP3 F4TP4 C4TP5 L4TP6 G6TP7 J7TP8 O6TP9 O7TP10 J5TP11 D3TP12 F2TP13 D8TP14 K5

DES LOC



VICTORIA B.C.ELECTRONICS LTD.DANIELS

DWG REV DATE: 02 JUNE 2005DWG No: 01-S-03-02

REVISED BY: BRENT S

Wire Jumperfor Dual PortModulationOnly

BOARD No: 43-911923 Rev. 2.3

DATE: 19 APR 2000

Note 1

------->

R89

JU40C11 JU30

JU45C56

TP13


-------------------------

U6

Q1 P12FB1


-----

-----

DWN BY: LARRY JOE

TITLE: MT-3 TX AUDIO PROCESSOR SCHEMATIC DIAGRAM

APRVD:

TCXO MODULATIONLEVEL ADJUST

TCXO DCLEVELADJUST

INPUT DC LEVELADJUST


Y

X

Y

X

Y

X

TWO PORT POLARITY

Y

X

PRE-EMPHASIS

FLAT AUDIO

4.0V VOLTAGEADJUST

Y

X

Y

X

Y

X


PRE-EMPHASIS

FLAT AUDIO


Y

X

Y

X

DCS, LTR

VOICE + SUBAUDIBLE

TEMPERATURECOMPENSATION

LIMITER

Y

X

Y

X

Y

X

high = wideband selectlow = narrow band select

10 POLE LOWPASS FILTER

Y

X

Y

X

Tx Audio Control

OPTIONAL

Y

X

BALANCED AGC PREAMP


YX

AUXILIARY INPUT LEVEL CONTROL


+9.5V CONTINUOUS

Y

X

Y

X

Y X

YX

LOW FREQUENCY / DIRECT MODULATION OUTPUT

high = voicelow = data

DEVIATIONCONTROL

YX

DIRECTMODULATIONINPUT

BALANCED INPUT

MICROPHONE INPUTLEVEL CONTROL

PRE-EMPHASIS

FLAT AUDIO


3P1

2P1

1P1

4P1

3P3

3P2

1P2

1P4

3P4

1P3

2

P4

4P4

JU37

4

P2+9.5V CONTINUOUS

C34.7uF

213

JU22

10nFC10

+9.5V CONTINUOUS

C454.7uF

C284.7uF

R464K53

100KR16

10nFC17

10nFC49

1

2

3

50K0R29

49K9R55

10K0R75

E

B

C

BC817-25Q1

10nFC5

1

23

5K0R2

FB1

TP1

+8.0V SWD

+8.0V SWD

+8.0V SWD

+8.0V SWD

+8.0V SWD

JU6

JU31

4P3

2P3

0R0R44

N/IR45

4.7uFC48

4.7uFC50

100nFC18

1.0nFC12

SELR54

12

3

50K0R36

1

2

3

JU5

JU32

C1347uF

3

2

1

R48100K0

C7680nF

C84.7uF

TP3

R32SEL

C3147uF

C2947uF

R57SEL

C32N/I (22nF)

JU29

C34SEL

N/IR12

Rect In

Var G

Rect Cap

Output

Inv In

R3

THDTrim

15

14

16

10

12

11

9

aSA571DU1

C42680nF

TP12

C264.7uF

Vcc

Rect In

Var G

Rect Cap

Output

Inv In

R3

THDTrim

GND

2

3

1

7

5

6

8

13

4

bU1SA571D

1

2

3

JU27

+9.5V CONTINUOUS

2P2

JU1649K9R79

JU7

R23SEL

R24N/I

R25SEL

R26N/I

R28SEL

R17SEL

R18SEL R20

SEL

In+

In-

Gnd

V-

Vout

V+

Rx

Div/Clk

1

2

3

4

8

7

6

5

LTC1569-6U4

16K2R66

56K2R67

3K48R68

2K00R69

+8.0V SWDP11

P12

P9 P10

2

3

11

1

4a

MC33174U2

9

108

cMC33174U2

2

34

1

11

aMC33174U3

6

57

bMC33174U3

1 2

SELR19

1 2

R27SEL

N/IR74

N/IR73

R720R0

R580R0

1

21.0uFC21

1

21.0uFC6

49K9R37

49K9R34

+8.0V SWD

10nFC20

13

1214

dMC33174U2

4.0V


4.0V

4.0V

10nFC24

R1310K0

R1510K0

4.0V

+8.0V SWD

4.0V

JU23

TP5

TP6

TP7

TP8

TP9

11K8R43

680nFC39

R81SEL JU41

C4110nF

3

2

1

R425K0

1.0uFC35

1.0uFC1

1.0uFC9

1.0uFC30

100KR3

100KR33 100K

R47

10K0R82

3.3nFC37

10K0R84

10K0R85

10K0R86

3

2

1

50K0R83

N/IR53

27K4R80

+8.0V SWD

1

2

3

JU3510K0R78

16k2R49

10nFC14

4.0V

16k2R76

1.0uFC16

JU33

5K11R71

TP10

1

2

3

JU20

1.0uFC51

1

2

3

JU12

2

1

3

JU15

15K4R39

137KR41

20K0R59

15K4R62

1M00R5

1.0uFC25

18K2R60

18K2R61

2K21R8

49K9R9

18K2R4

18K2R6

C36330nF

3.3nFC15

2K21R7

49K9R10C19

330nF

1.0uFC2

10K0R51

2

1

3

JU1

2

1

3

JU2

2

3

1

JU39

JU111 2

C43150pF

12

3JU34

JU38

3

2

1N/I (5K0)

R14

TP11

TP4

JU10

100KR52

100KR65

3.3nFC38

2K21R11

49K9R40

2

1

3JU14

1

23

5K0R31

604RR30

TP2

330pFC23

13

1214

dMC33174U3

10nFC22

10K0R70

JU8

C27100nF

C331.0uF

C401.0uF

C471.0uF

C461.0uF

1

2

3

JU42

6

57

bMC33174U2

MT-3 TX TIME-OUT-TIMER

J3

J2 J4

J1

P7

P6

P5

P8

1

23

50K0R87

+8.0V SWDTP13

1

2

3JU25

49K9R22

49K9R21

1 2

3

4

5TC4S66FU5

1 2

3

4

5

TC4S66FU6

4.0V

49K9R50

49K9R88

JU43

150pFC52

1

2

3

JU4JU26

JU28

JU134.0V

R10R0

100KR64

C534.7uF 100nF

C54

100nFC55

0R0R56

TP14

JU44

C56SEL

4.0V

1.0uFC4

+9.5V CONTINUOUS

20K0R77JU18

2

31

JU36

JU17

1

2

3JU9

2

1 3

JU19

2

3

1

JU21 1 2JU45

1

2

3

JU24

1

2

3

JU3

1

23

R635K0

3

21

R385K0

100RR89

330pFC44

9

108

cMC33174U3

R351K00

MICROPHONE INPUT

SUBTONE INPUT 2

SUBTONE INPUT 1

TONE/DIGITAL I/P

FM Transmitter Main Board Instruction ManualIM20-MT3TXMN

45

PARTS LIST

TRANSMITTER MAIN BOARD ELECTRICAL PARTS L IST

Ref. Desig. Description Part NumberC1 CAP., SM, 10uF TANT., 10%, 35V 1055-6D106K35C2 CAP., SM, 1uF TANT., 20%, 35V 1055-5B105M35C3 CAP., SM, 10uF TANT., 20%, 16V 1055-6C106M16C4 CAP., SM, 1uF TANT., 20%, 16V 1055-5A105M16C5 CAP., SM,100nF CER,0805,X7R,50 1008-5A104K5RC6 CAP., SM,10nF CER,0805,X7R,50V 1008-4A103K5RC7 CAP., SM,10nF CER,0805,X7R,50V 1008-4A103K5RC8 CAP., SM,100nF CER,0805,X7R,50 1008-5A104K5RC10 CAP., SM,1uF,CER/2225,50V,,X7R 1008-6H105J5RC12 CAP., SM,10nF CER,0805,X7R,50V 1008-4A103K5RC13 CAP., SM,10nF CER,0805,X7R,50V 1008-4A103K5RC14 CAP., SM,10nF CER,0805,X7R,50V 1008-4A103K5RC15 CAP., SM, 4.7uF TANT., 10%,16V 1055-5B475K16C20 CAP., SM, 4.7uF TANT., 10%,16V 1055-5B475K16C21 CAP., SM,100nF CER,0805,X7R,50 1008-5A104K5RC22 CAP., SM,100nF CER,0805,X7R,50 1008-5A104K5RC23 CAP., 100nF FILM, MMK5,10%,63V 1016-5A104K63

CONN1CONNECTOR, F/48 MALE, R/A PCB 3720-6048M0RASCREW, M2.5 x 10 PAN/PHIL, A2 5812-2M5PP10SNUT, M2.5, HEX, 5.0mm FLATS,A2 5813-2M5HX50S

D1 DIODE, BYD17J, RECTIFIER,SOD87 2101-BYD17J00D2 DIODE, BYD17J, RECTIFIER,SOD87 2101-BYD17J00D3 DIODE, BYD17J, RECTIFIER,SOD87 2101-BYD17J00D4 DIODE, BYD17J, RECTIFIER,SOD87 2101-BYD17J00D5 DIODE, BYD17J, RECTIFIER,SOD87 2101-BYD17J00D6 DIODE, BYD17J, RECTIFIER,SOD87 2101-BYD17J00D7 DIODE, BAS16, SWITCHING, SOT23 2100-BAS16000D8 DIODE, BAS16, SWITCHING, SOT23 2100-BAS16000


Parts List46

Ref. Desig. Description Part NumberFSW1 SWITCH, BCD-16 STEPS,5 PIN,PCB 5273-16BCD001FSW2 SWITCH, BCD-10 STEPS,5 PIN,PCB 5273-10BCD001FSW3 SWITCH, BCD-10 STEPS,5 PIN,PCB 5273-10BCD001FSW4 SWITCH, BCD-10 STEPS,5 PIN,PCB 5273-10BCD001

JS1SOCK. STRIP-L/P,1ROW x12PIN,Au 5016-SL112G08SOCK. STRIP-L/P,1ROW x 9PIN,Au 5016-SL109G08

JS2 SOCK. STRIP-L/P,1ROW x 6PIN,Au 5016-SL106G08JS3 SOCK. STRIP-L/P,1ROW x 2PIN,Au 5016-SL102G08

LPF1-5 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5LPF8 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5LFP10 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5LPF12 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5LPF14-35 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5

PEM NUT, PRESS,M2.5,5.6mmOD,PC MNT 5833-T2M55615PCB PCB, MT-3 TRANSMITTER, MAIN 4321-10920917

Q1 TRANSISTOR, BC817-25,NPN,SOT23 2120-BC817025Q3 TRANSISTOR, BC817-25,NPN,SOT23 2120-BC817025Q4 TRANSISTOR, BC817-25,NPN,SOT23 2120-BC817025Q5 MOSFET, D5P06V, P-CHAN., D-PAK 2144-D5P06V00Q6 TRANSISTOR, BC817-25,NPN,SOT23 2120-BC817025Q7 MOSFET, D5P06V, P-CHAN., D-PAK 2144-D5P06V00Q8 TRANSISTOR, BC807-25,PNP,SOT23 2120-BC807025Q9 MOSFET, D15N06V, N-CHAN., DPAK 2144-D15N06V0Q10 TRANSISTOR, PZT2222A,NPN,ST223 2120-PZT2222AQ11 TRANSISTOR, BC807-25,PNP,SOT23 2120-BC807025

R1 RES., SM, 10R0 0805, 1%,100ppm 1150-1A10R0FPR2 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR3 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPR4 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR5 RES., SM, 10R0 0805, 1%,100ppm 1150-1A10R0FPR6 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR7 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPR8 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR9 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR10 RES., SM, 100K 0805, 1%,100ppm 1150-5A1003FPR11 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR12 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR13 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FP

Transmitter Main Board Electrical Parts List continued


Parts List 47

Ref. Desig. Description Part NumberR14 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR15 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR16 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR17 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPR18 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR19 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR20 RES., SM, 68K1 0805, 1%,100ppm 1150-4A6812FPR21 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR22 RES., SM, 68K1 0805, 1%,100ppm 1150-4A6812FPR23 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR24 RES., SM, 68K1 0805, 1%,100ppm 1150-4A6812FPR25 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR26 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPR29 RES., SM, 82K5 0805, 1%,100ppm 1150-4A8252FPR30 RES., SM, 15K0 0805, 1%,100ppm 1150-4A1502FPR31 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR32 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPR33 RES., SM, 68K1 0805, 1%,100ppm 1150-4A6812FPR34 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR35 RES., SM, 27K4 0805, 1%,100ppm 1150-4A2742FPR36 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR37 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPR38 RES., SM, 100K 0805, 1%,100ppm 1150-5A1003FPR39 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR40 RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FPR41 RES., SM, 15K0 0805, 1%,100ppm 1150-4A1502FPR43 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR44 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR45 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR46 RES., SM, 221K 0805, 1%,100ppm 1150-5A2213FPR47 RES., SM, 1K00 0805, 1%,100ppm 1150-3A1001FPRELAY1 RELAY, 9VDC, 2 FORM C,PCB MNT. 5310-2C09P005

T1 TRANSFORMER, AUDIO,600R,1:1 1280-600P6005

U1 IC, MC33172, DUAL OP AMP, SO-8 2302-33172N08U2 IC, 4081, QUAD 2I/P AND, SO-14 2375-40810N14U3 IC, MMAD1108,8 DIODE/ARY.,SO16 2331-11080N16U4 IC, MMAD1108,8 DIODE/ARY.,SO16 2331-11080N16U6 IC, LP2951,PROG. VOLT REG,SO-8 2305-29510N08U7 IC, MC33172, DUAL OP AMP, SO-8 2302-33172N08U8 IC, 4536, PROG. TIMER, SO-16L 2375-45360W16

Transmitter Main Board Electrical Parts List continued


Parts List48

AUDIO PROCESSOR ELECTRICAL PARTS L IST

Ref. Desig. Part Number Description A

LL M

OD

ELS

UT-

3/42

0-S

XC

X00

UT-

3/46

0-S

XC

X00

UT-

3/81

5-S

XC

300

UT-

3/86

0-S

XC

300

UT-

3/93

0-S

XB

300

UT-

3/95

0-S

XB

300

VT-

3/14

0-S

XA

X00

VT-

3/16

0-S

XA

X00

VT-

3H03

5-S

XA

300

VT-

3H04

5-S

XA

300

C1 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C2 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C3 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C4 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C5 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C6 1055-5A105M16 CAP., SM, 1uF TANT., 20%, 16V •C7 1008-5B684M3R CAP.,SM,680nF CER,1206,X7R,25V •C8 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C9 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C10 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C12 1008-3A102K5R CAP., SM, 1nF CER,0805,X7R,50V •C13 1055-6D476M16 CAP., SM, 47uF TANT., 20%, 16V •C14 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C15 1016-3A332K63 CAP., 3.3nF FILM, MMK5,10%,63V •C16 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C17 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C18 1008-5A104K5R CAP., SM,100nF CER,0805,X7R,50 •C19 1008-5A334M3R CAP.,SM,330nF CER,0805,X7R,25V •C20 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C21 1055-5A105M16 CAP., SM, 1uF TANT., 20%, 16V •C22 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C23 1008-2A331J1G CAP., SM, 330pF CER., 0805,C0G •C24 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C25 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C26 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C27 1008-5A104K5R CAP., SM,100nF CER,0805,X7R,50 •C28 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C29 1055-6D476M16 CAP., SM, 47uF TANT., 20%, 16V •C30 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C31 1055-6D476M16 CAP., SM, 47uF TANT., 20%, 16V •C33 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C34 1054-5A105M35 CAP., 1uF DIP. TANT., 20%, 35V •C35 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C36 1008-5A334M3R CAP.,SM,330nF CER,0805,X7R,25V •C37 1016-3A332K63 CAP., 3.3nF FILM, MMK5,10%,63V •C38 1016-3A332K63 CAP., 3.3nF FILM, MMK5,10%,63V •C39 1055-4B684K35 CAP., SM, 680nF TANT., 10%,35V •


Parts List 49


LL M

OD

ELS

UT-

3/42

0-S

XC

X00

UT-

3/46

0-S

XC

X00

UT-

3/81

5-S

XC

300

UT-

3/86

0-S

XC

300

UT-

3/93

0-S

XB

300

UT-

3/95

0-S

XB

300

VT-

3/14

0-S

XA

X00

VT-

3/16

0-S

XA

X00

VT-

3H03

5-S

XA

300

VT-

3H04

5-S

XA

300

C40 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C41 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C42 1008-5B684M3R CAP.,SM,680nF CER,1206,X7R,25V •C43 1008-2A151J1G CAP., SM, 150pF CER., 0805,C0G •C44 1008-2A331J1G CAP., SM, 330pF CER., 0805,C0G • • • • • •C45 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C46 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C47 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C48 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C49 1008-4A103K5R CAP., SM,10nF CER,0805,X7R,50V •C50 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C51 1008-6B105Z3R CAP., SM, 1uF CER,1206,X7R,25V •C52 1008-2A151J1G CAP., SM, 150pF CER., 0805,C0G •C53 1055-5B475K16 CAP., SM, 4.7uF TANT., 10%,16V •C54 1008-5A104K5R CAP., SM,100nF CER,0805,X7R,50 •C55 1008-5A104K5R CAP., SM,100nF CER,0805,X7R,50 •C56 1008-4A333K5R CAP., SM,33nF CER,0805,X7R,50V •

FB1 1213-43181200 FERRITE BEAD, SM,43MIX,.18x.12 •

P1 5010-H202RA9T HEADER, .1”, R/A, 2 ROW X 2PIN •P2 5010-H202RA9T HEADER, .1”, R/A, 2 ROW X 2PIN •P3 5010-H202RA9T HEADER, .1”, R/A, 2 ROW X 2PIN •

P4 5010-H202RA9T HEADER, .1”, R/A, 2 ROW X 2PIN •

PCB 4321-30911923 PCB, AUDIO PROCESSOR, MT-3 TX •

Q1 2120-BC817025 TRANSISTOR, BC817-25,NPN,SOT23 •

R1 1150-0A0R0000 RES., SM, ZERO OHM JUMPER,0805 •R2 1174-DM2502J0 POT.,SM/4mmSQ,5K0,MUL/TRN,SIDE •R3 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •R4 1150-4A1822FP RES., SM, 18K2 0805, 1%,100ppm •R5 1150-6A1004FP RES., SM, 1M00 0805, 1%,100ppm •R6 1150-4A1822FP RES., SM, 18K2 0805, 1%,100ppm •R7 1150-3A2211FP RES., SM, 2K21 0805, 1%,100ppm •R8 1150-3A2211FP RES., SM, 2K21 0805, 1%,100ppm •R9 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R10 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R11 1150-3A2211FP RES., SM, 2K21 0805, 1%,100ppm •

Audio Processor Electrical Parts List continued


Parts List50


LL M

OD

ELS

UT-

3/42

0-S

XC

X00

UT-

3/46

0-S

XC

X00

UT-

3/81

5-S

XC

300

UT-

3/86

0-S

XC

300

UT-

3/93

0-S

XB

300

UT-

3/95

0-S

XB

300

VT-

3/14

0-S

XA

X00

VT-

3/16

0-S

XA

X00

VT-

3H03

5-S

XA

300

VT-

3H04

5-S

XA

300

R13 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R15 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R16 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •

R17

1150-3A2001FP RES., SM, 2K00 0805, 1%,100ppm •1150-3A5111FP RES., SM, 5K11 0805, 1%,100ppm •1150-4A1182FP RES., SM, 11K8 0805, 1%,100ppm •1150-4A1332FP RES., SM, 13K3 0805, 1%,100ppm • •1150-4A3652FP RES., SM, 36K5 0805, 1%,100ppm •1150-4B1132FP RES., SM, 11K3 1206, 1%,100ppm •

R181150-4A3652FP RES., SM, 36K5 0805, 1%,100ppm •1150-3A3011FP RES., SM, 3K01 0805, 1%,100ppm •1150-3A4751FP RES., SM, 4K75 0805, 1%,100ppm •

R20

1150-2A6040FP RES., SM, 604R 0805, 1%,100ppm •1150-3A2211FP RES., SM, 2K21 0805, 1%,100ppm •1150-3A6811FP RES., SM, 6K81 0805, 1%,100ppm • • • •1150-4A1182FP RES., SM, 11K8 0805, 1%,100ppm •1150-4A1502FP RES., SM, 15K0 0805, 1%,100ppm •

R28 1150-3A3011FP RES., SM, 3K01 0805, 1%,100ppm •R21 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R22 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •

R251150-3A1001FP RES., SM, 1K00 0805, 1%,100ppm • • • • • •1150-4A1182FP RES., SM, 11K8 0805, 1%,100ppm •1150-4A1822FP RES., SM, 18K2 0805, 1%,100ppm • • •

R261150-3A8251FP RES., SM, 8K25 0805, 1%,100ppm • •1150-4A1182FP RES., SM, 11K8 0805, 1%,100ppm •1150-4A1822FP RES., SM, 18K2 0805, 1%,100ppm •

R271185-4B103AAK THERMISTOR/SMT, 10K, NTC, 1206 • • • •1180-2RDH301K THERMISTOR, 300R,NTC,10%,RADL. • •

R281150-3A4531FP RES., SM, 4K53 0805, 1%,100ppm • • •1150-3A1501FP RES., SM, 1K50 0805, 1%,100ppm •

R29 1174-DM3503J0 POT.,SM/4mmSQ,50K,MUL/TRN,SIDE •R30 1150-2A6040FP RES., SM, 604R 0805, 1%,100ppm •R31 1174-DM2502J0 POT.,SM/4mmSQ,5K0,MUL/TRN,SIDE •R32 1150-4A5112FP RES., SM, 51K1 0805, 1%,100ppm • • • •R33 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •R34 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R35 1150-3A1001FP RES., SM, 1K00 0805, 1%,100ppm • • • •R36 1174-DM3503J0 POT.,SM/4mmSQ,50K,MUL/TRN,SIDE •R37 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •



Parts List 51


LL M

OD

ELS

UT-

3/42

0-S

XC

X00

UT-

3/46

0-S

XC

X00

UT-

3/81

5-S

XC

300

UT-

3/86

0-S

XC

300

UT-

3/93

0-S

XB

300

UT-

3/95

0-S

XB

300

VT-

3/14

0-S

XA

X00

VT-

3/16

0-S

XA

X00

VT-

3H03

5-S

XA

300

VT-

3H04

5-S

XA

300

R38 1174-DM2502J0 POT.,SM/4mmSQ,5K0,MUL/TRN,SIDE •R39 1150-4A1542FP RES., SM, 15K4 0805, 1%,100ppm •R40 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R41 1150-5A1373FP RES., SM, 137K 0805, 1%,100ppm •R42 1174-DM2502J0 POT.,SM/4mmSQ,5K0,MUL/TRN,SIDE •R43 1150-4A1182FP RES., SM, 11K8 0805, 1%,100ppm •R44 1150-0A0R0000 RES., SM, ZERO OHM JUMPER,0805 •R46 1150-3A4531FP RES., SM, 4K53 0805, 1%,100ppm •R47 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •R48 1174-DM4104J0 POT.,SM/4mmSQ,100K,MUL/TN,SIDE •R49 1150-4A1622FP RES., SM, 16K2 0805, 1%,100ppm •R50 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R51 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R52 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •R54 1150-2A1000FP RES., SM, 100R 0805, 1%,100ppm • • • •R55 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R56 1150-0A0R0000 RES., SM, ZERO OHM JUMPER,0805 •R58 1150-0A0R0000 RES., SM, ZERO OHM JUMPER,0805 •R59 1150-4A2002FP RES., SM, 20K0 0805, 1%,100ppm •R60 1150-4A1822FP RES., SM, 18K2 0805, 1%,100ppm •R61 1150-4A1822FP RES., SM, 18K2 0805, 1%,100ppm •R62 1150-4A1542FP RES., SM, 15K4 0805, 1%,100ppm •R63 1174-DM2502J0 POT.,SM/4mmSQ,5K0,MUL/TRN,SIDE •R64 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •R65 1150-5A1003FP RES., SM, 100K 0805, 1%,100ppm •R66 1150-4A1622FP RES., SM, 16K2 0805, 1%,100ppm •R67 1150-4A5622FP RES., SM, 56K2 0805, 1%,100ppm •R68 1150-3A3481FP RES., SM, 3K48 0805, 1%,100ppm •R69 1150-3A2001FP RES., SM, 2K00 0805, 1%,100ppm •R70 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R71 1150-3A5111FP RES., SM, 5K11 0805, 1%,100ppm •R72 1150-0A0R0000 RES., SM, ZERO OHM JUMPER,0805 •R75 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R76 1150-4A1622FP RES., SM, 16K2 0805, 1%,100ppm •R77 1150-4A2002FP RES., SM, 20K0 0805, 1%,100ppm •R78 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R79 1150-4A4992FP RES., SM, 49K9 0805, 1%,100ppm •R80 1150-4A2742FP RES., SM, 27K4 0805, 1%,100ppm •R82 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •



Parts List52


LL M

OD

ELS

UT-

3/42

0-S

XC

X00

UT-

3/46

0-S

XC

X00

UT-

3/81

5-S

XC

300

UT-

3/86

0-S

XC

300

UT-

3/93

0-S

XB

300

UT-

3/95

0-S

XB

300

VT-

3/14

0-S

XA

X00

VT-

3/16

0-S

XA

X00

VT-

3H03

5-S

XA

300

VT-

3H04

5-S

XA

300

R83 1174-DM3503J0 POT.,SM/4mmSQ,50K,MUL/TRN,SIDE •R84 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R85 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R86 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm •R81 1150-4A5112FP RES., SM, 51K1 0805, 1%,100ppm • •

U1 2327-SA571D00 IC, SA571D, COMPANDOR, SO-16L •U2 2304-33174N14 IC, MC33174, QUAD OP AMP,SO-14 •U3 2304-33174N14 IC, MC33174, QUAD OP AMP,SO-14 •U4 2326-15696N08 IC, LTC1569I,LPF,10TH ORD,SO-8 •U5 2375-4S66FSMV IC, 4S66F,BILATERAL SWITCH,SMV •U6 2375-4S66FSMV IC, 4S66F,BILATERAL SWITCH,SMV •

FRONT PANEL BOARD ELECTRICAL PARTS L IST

Ref. Desig. Description Part NumberD1 SPACER, LED-T1 3/4, .300”H,NYL 5620-503S300N

LED, RED, 5mm OD, T-1 3/4 2010-503001RD

PCB PCB, MT-3 TX, FRONT PANEL,V1.2 4321-40921212PF1 HEADER, .1”, R/A, 2 ROW X 2PIN 5010-H202RA9TPF2 HEADER, .1”, R/A, 2 ROW X 2PIN 5010-H202RA9TPF3 HEADER, .1”, R/A, 2 ROW X 2PIN 5010-H202RA9T

SW1 WASHER, TFE,0.036ID,1/8OD,.02T (Qty. 2) 5805-T3612F20SWITCH, TOG/DPDT,O-O-O,PCB/STR 5215-T2031V02



53

REVISION HISTORY

Revision Date ECO Description3 Nov 98 • MT-3 FM Audio Processor now version 1.8

The MT-3 FM Audio Processor was re-designed because the IC, SL62070, VOGAD, SO-8 is no longer available from the supplier. Also, the new design improves the flat and 300Hz Pre-emphasis audio responses. Included PCB version 1.8 Component Layout, Schematic diagram, Parts List and Section 2.4, 3.9 and 3.10.

• Updated the DE Logo and added the statuary trademark statement to the title page.

• Updated the Low Frequency Modulation section. 3.11 to reflect the in house document A0361-06.

3 Dec 98 • Corrected the part number for U1 on the Audio Processor (V1.8). • Updated the tuning procedures for the Audio Processor (V1.8),

section 3.10.2 • Corrected JU30 on the Audio Processor (V1.8) component layout,

x & y were labelled backwards.3 Jan 99 • Corrected the description of operation for the Received Audio

(section 2.1.3.2). The Audio Amplifier circuitry was removed in version 1.7 of the main board.

5012 • The aluminum extrusions are no longer subcontracted parts. CASE, 14HP RF PLUG-IN, MT-3 TX was 3802-62502010 now 3702-62502010.

3 Jul 00 • Corrected the parts description of D7 &D8 on the TX Main Board Parts List. (Section 6.1.1)

3 Oct 00 • Corrected the Pinout for P1 on the Front Panel Board Component Layout (Page 5-6).

• New Version (2.3) Audio Processor Board. “Addendum” IM20-AP20 issued to provide information for new board separate from this manual. IM20-AP20 covers only the Version 2.3 Audio Processor.

3 Feb 01 5073 • The relay is always installed now. J3-X was not installed now installed

3 Apr 01 5069 • The SMA and SMB are now a turnkey production. Part numbers were $7910… are now 7910…

Revision History continued next page


Revision History54

Revision Date ECO Description3 May 01 • Updated audio-response specification (pg 1-2.) • Incorporated the AM Audio Processor documentation into the

Addendum Audio Processor manual, IM20-AP3. • Updated FM Audio Processor Tuning Procedure, expanded to Flat

audio. • Corrected typos for Flat Audio tuning • Corrected schematic typo R1. Was 215R, now 0 Ohms. • Changed Parts List Select Components to Select instead of TBA. • Inserted correct part number for 16k2 SM resistors instead of TBA • New Audio Processor jumper tables updated. • Table 5: Standby Mode Selection Table updated. • V2.3 Audio Processor Addendum reissued for internal release 1A

in the Nov/01 revision numbering convention. • JU29 and JU32 installed now for UHF & VHF Crystal transmitters.

Improves subtone frequency response at 67 Hz as used in version 1.8. Jumper table updated.

639 • Changed the FM Audio Processor tuning procedure section to provide two procedures: - Pre-Emphasis for Versions 1.8, 2.2 and 2.3 - Flat Audio for Versions 1.8, 2.2 and 2.3.

• Changed jumper label on schematic to indicate “Dual Port modulation only” (was “UHF only”)

641 • C39 was 2.2µF now 680nF3 Jun 01 • Corrected formatting error in Flat Audio Alignment procedures.

Step 14 - Analyzer Level should read –10 dBm. • Removed all AM Transmitter and AM Audio Processor information

from the Version 2.3 Audio Processor Addendum, IM20-AP3 and changed its document title to reflect use for FM transmitters only.

3 Jun 01 • Second Issue of IM20-AP3 Audio Processor Addendum 3 Aug 01 657 • Some multi-layer ceramic capacitor types upgraded in tolerance

and voltage and were more readily available for stock than original parts specified in the parts list. Parts list updated.

655 • Changes to V2.3 Audio Processor Addendum, IM20-AP3: C19, C36 now 1008-5A334K4R C7, C42 now 1008-5B684K4R C1,2,4,9,16,25,30,33,35,40,46,47 & 51 now 1008-6B105K3R. Updated Audio Processor Jumper and Select Tables for VHF/UHF. Wideband/Narrowband and LTR™ configurations tables also include R54 change for synthesizers with BeckElec TCVCXO

3 Oct 01 • Added notes regarding dual mode CTCSS and DCS/ LTR™. 676 • Transmitter Front Panel Switch shorting to trace.

Added Teflon Washers TFE, 0.036ID, 1/8OD,.02T to the mechanical part list. Qty 2 per. These are installed over the switch leads between the PCB and the switch body.

3 Nov 01 • Instruction sheet references added to Audio Processor Jumper Tables. Audio Processor Version 2.3 Addendum, IM20-AP3 reissued as 2A for internal use.

3 Dec 01 • Audio Processor Version 2.3 Addendum, IM20-AP3 reissued as 2B for internal use.

• Improved tuning procedure using distortion technique for setting compression for Pre-emphasis/CTCSS.

3 Mar 02 701 • TOT specification changed from 5min ± 30sec to 5min ± 50sec.3 Apr 02 697 • Improve hum & noise performance, UT-3/8xxx only Version 2.3

Audio Processor changes: - C56 now 22nF for 800 MHz LTR™ only (remains as 33nF for other bands.) - JU29, JU32, and JU44 Not Installed for 800 MHz LTR™

Revision History continued next page


Revision History 55

Revision Date ECO Description3 Feb 02 678 • To prevent frequency error when PTT first activated. Reduction of

charge time for C34 on the Version 2.3 Audio Processor. - C34 now 1.0µF, DIP Tantalum (was 47µF SM Tantalum) - C34 remains as 47µF for LTR™ & DCS applications.

4 Mar 03 • Reissue including Version 2.3 Audio Processor information. Version 1.6 Audio Processor information is removed. - Issue 4 covers Version 1.8, 2.2 & 2.3 Audio Processors. - Issue 4 contains no AM information - the document title is changed to reflect coverage of only FM transmitters.

699 • For VT-3H035 & VT-3H045 transmitters, to reduce spurious emissions for CE approval, the PCB trace pattern is modified and C44 is Not Installed.

701 Time Out Timer tolerance is changed to ±17%. Tolerance for 5 minutes setting is ± 50sec.

4-1-0 Sept 03 • New Manual Format • Removed all reference to Version 1.8 Audio Processor 4-1-1 Oct 03 - - - • Typographical updates to manual. 4-2-0 Jan 05 660 • Update Audio Processor Component Layout Dwg:

43-911923-01-T-01-01 to 43-911923-01-T-02-01 43-911923-01-S-0101 to 43-911923-01-S-02-01 Add Select table for Audio Processor Components: “Audio Processor Component Layout Selection Table”

791 • Update Main Board Component & Schematic Dwg to update J25 SEL: X installed for FM Products & Y installed for AM Products

- - - • Update Tx Front Panel Component Dwg: 43-921212-01-T-01-01 to 43-921212-01-T-02-01 Update specification tables and part list

829 • Update Parts List 836 • Update C56 to 47nF for 950MHz transmitters. 4-3-0 Jun 05 836A1 • CO 836 expanded to include the UT-3/930-SXB300 Audio

Processor model selected components 836A2 • CO 836 expanded to include the UT-3/930-SXB300 with this main

board. 846 • Update Audio Processor Component Layout and the Audio

Processor Component Layout Selection Table. • Alignment procedures updated. - - - • Revision History older than 7yrs removed from publication. • Top level mechanical parts moved to the top level Transmitter IM’s;

- for all VHF Synthesized Tx mech parts consult IM20-VT3150 - for all UHF Synthesized Tx mech parts consult IM23-UT3400 - for all Crystal Tx mech parts consult IM21-xT3C

4-4-0 Dec 05 6056 • OC-3 Product discontinued. Remove references. 6113 • VT-3/140 Audio Processor select value table updated 6115 • VT-3/160 Audio Processor select value table updated4-5-0 Feb 06 6129 • UT-3/420-SXCX00 Audio Processor select value table updated 6130 • UT-3/460-SXCX00 Audio Processor select value table updated - - - • Audio Processor Parts list expanded to display all models and thier

band selected components.


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