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DET.EAMJNJNG ·NETWORKS

The Model 1200A is a frequency shift tone demod­ulator designed specifically for use in radio tele­printer applications. Due to the use of the patent­ed * "Decision Threshold Computer" (DTC) tech­nique, outstanding performance is realized for signals derived from the HF radio band.

This technique has been designed to combat the undesirable effects of frequency selection fading which normally plagues HF radio reception, and provides the equivalent of diversity performance (as realized with a ratio detector system) with a single antenna/receiver/demodulator set-up. No separate diversity combiner or comparator unit is required. The "DTC" principle has been widely used in other FEC demodulator designs and has a long history of highly successful operation.

Conventional FSK Demodulators are subject to errors during selective fading on either the mark or space frequencies because of a fixed decision threshold. The Model 1200A, utilizing the DTC, compensates for selective fading by varying its decision threshold to provide optimum detection. The Demodulator provides diversity performance with a single antenna/receiver combination, mak­ing it ideally suited to military, commercial, and

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amateur RTTY applications where large diversity installations are not possible.

The plug-in mark and space bandpass filters are optimized for the particular frequency shift, tone frequencies, and keying speeds utilized. Plug-in filters not only increase the adaptability of the Demodulator to a variety of signal requirements, but also reduce in-the-field changeover time. As an added feature, the bandpass filter outputs can be used for remote AGC with compatible receivers.

The Model 1200A is of modular, solid-state con­struction with all components mounted on printed circuit cards. All parts and modules are easily accessed by removing the top cover. Frequency determining networks are mounted on small plug­in subassemblies so that operating parameters may be easily changed.

For more information regarding this, or any other FEC product, please contact any authorized FEC marketing representative.

*Manufactured under U.S. Pat. No. 2,999,925.

'

OPTIONAL FEATURES

Diversity Demod Board - A plug-in PC board, which accepts a separate audio input, and provides additional diversity operation. Assembly D3770.

Filters - Available filter range covers input signals from 400 Hz to 3500 Hz with shifts from 85 to 1000 Hz and mark/space filter bandwidths from 50 Hz to 500 Hz. Input rates available up to 300 baud.

Loop Supply - A plug-in module supplies up to 60 mA/130 Vdc for neutral loops or up to 60 mA/+-65 Vdc for polar loops. Assembly C2324. (External current limiting is required.)

Neutral/Polar Keyer - A keyer board pro­vides dry contacts for keying up to 60 ma/130 Vdc neutral or polar telegraph loops. Assembly C3240 (two required for polar).

SPECIFICATIONS

ELECTRICAL

Input Impedance - Balanced and isolated, 600 ohms; balanced and isolated, 10K ohms; high input Z.

Input Signal - 0 dBm on/off keyed (CW) or audio FSK tones. Available in range of 400 to 3500 Hz.

Linear Operation - 0 to -60 dBm in "normal" mode; 0 to -55 dBm in "mark" or "space" only modes.

Saturation - Signals over +4 dBm will cause clipping. Unit will accept up to +20 dBm without damage.

Baud Rate · Standard TTY rates up to 300 baud, depending upon frequency shift and mark/space filter bandwidth.

Mark/Space Filters - Tone frequencies, 400 to 3500 Hz; bandwidth, 50 to 500 Hz; fre­quency shifts, 85 to 1000 Hz.

Output Circuit - Detected digital waveform in accordance with E lA Standard RS-232-C.

Detected digital waveform compatible with the low level interface requirements of MIL­STD-188C. Tie points for diversity operation in conjunction with another 1200A (low impedance).

Output Keying- See Optional Features.

Power Requirements - 115/230 Vac, +-1 0%, 50-400 Hz; 10 watts (w/o options).

MECHANICAL

Dimensions - 19 inches wide (48.3 em), 1-% inches high (4.4 em). 17 inches deep (43.2 em).

Finish - Chassis is clear anodized. Front panel is painted light gray, engraved and filled.

Mounting - Mounts in a standard 19-inch equipment rack (with or without optional slides).

Weight - Approximately 7'h pounds (3.4 kg), w/o options.

Servicing - The top cover of the unit is remov­able to permit maintenance.

ENVIRONMENTAL

Temperature Range - -100 to +600 C, oper­ating.

Relative Humidity - 0 to 95% (non-con­densing).

Atmospheric Pressure- To 15,000 feet.

Shock - 10 G's along any of the mutually perpendicular axes.

Vibration - Exceeds the requirements for MIL-STD-167, Type I.

ORDERING INFORMATION

When placing an order for a Model 1200A, it is necessary to specify the following:

• Mark/Space Tones • Operating Speeds • Optional Features

Mark/Space filters are available from 400 Hz to 3500 Hz. Some of the more popular filters and baud rates are shown in the tables to the right. Many other filters are available on request.

Parameters must be reviewed by an author­ized F EC marketing representative.

1000Hz 1275Hz 1575Hz 1700Hz 1850Hz

45 50 75

TYPICAL TONE FILTERS

TYPICAL BAUD RATES

ALL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTIFICATION

FREDERICK ELEC TRONICS CORPORATION Hayward Road/Post Office Box 502/Frederick, Maryland 21701 Telephone: (301) 662-5901 I Cable FREDCO I Telex: 893438

Date: 5/78

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DM.4.3 AUTO MARK-HOLD CIRCUITS

The auto mark-hold circuits do not function in an AMH2 mode. Refer to Sheet 2 of the schematic diagram. A LLO applied to Jl2-19, when the AMHl pushbutton is depressed, enables NAND gates Z27-C and Z22-C. Thus, the mark-hold condition is obtained when either (or both) mark and/or space outputs of the DTC circuit fall below threshold condition. In linear operation the threshold is at approximately -10 dbm; in limiter operation the threshold is at approximately -50 dbm.

DM.4.4 SCHMITT TRIGGER/SELECTOR CIRCUITS

The Schmitt trigger/selector circuits differ from those of the N01309 board in the biasing arrangement and the control of the DTC circuit. Refer to Sheet 2 of the schematic diagram. Since mark and space circuits are identical, only the mark circuit is described.

The biasing arrangement for JFET switch transistor Q8 and switch transistor Q7 is such to assure proper turn-ON of Q8.

When the MARK pushbutton switch is depressed, a LLO applied to Jl2-20, turns Q5, Q6, and Q4 OFF. This prevents application of space signals to the operational amplifier and inhibits operation of the continuous-level input detector portion of the mark DTC circuit as described in Paragraph DM.4.2.

DM.5 ALIGNMENT AND ADJUSTMENT PROCEDURES

DM.S.l REQUIRED TEST EQUIPMENT

The following test equipment (or equivalent) is required in addition to that listed in Table 5-l of the Model 1200A/1273 Instruction Manual:

1. Digital Distortion Analyzer, Digitech Model 2683-01.

2. Message Generator, Frederick Electronics Model 1306A.

DM.5.2 MARK CHANNEL GAIN ADJUSTMENT

Proceed as follows:

1. Set up the equipment as shown in Figure 5-l of the Model 1200A (or 1273) Instruction Manual, with the signal generator connected to pins 10 and 11 of TBl and the VTVM connected as shown by the dotted line (the LIMIT MODE pushbutton should be in the out

position).

2. Apply a space tone at -10 dbm. DM-7

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3. Reconnect the VTVM between pins 1 and 10 of Jl7; measure and note space filter output level.

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4. With the VTVM connected as indicated by the dotted line in Figure 5-l, apply a mark tone at -10 dbm.

5. Reconnect the VTVM between pins 4 and 10 of Jl7 and measure the mark filter output level.

6. Adjust MARK LEVEL potentiometer R29 to obtain the same ·

level as noted in Step 3.

7. If a diversity board is used in the 1200A unit, perform Steps 1 through 6 on the diversity board with the signal generator connected to pins 7 and 8 of TEl.

DM.5.3 MARK AND SPACE RECTIFIER OFFSET

Proceed as follows:

1. Electrically disconnect diversity board (N01490), if used, from its connector.

2. Disconnect connector Jl3 from the Demodulator board (N01483).

3. Connect oscilloscope probe to pin 1 of Jl7 (select its most sensitive input) and oscilloscope ground to pin 10 of Jl7 .

4. Adjust mark RECT OFFSET potentiometer R36 for zero-volt de.

5. Reconnect oscilloscope probe to pin 4 of Jl7.

6. Adjust space RECT OFFSET potentiometer R45 for zero­volt de.

7. If diversity board N01490 is used in the 1200A unit, adjust diversity channel mark and space rectifier offset

DM-8

as follows:

a. Adjust Demodulator board N01483 RECT OFFSET potentio­meters prior to adjusting the diversity channel.

b. Ensure that Jll is connected and that Jl5 is dis­connected.

c. Perform Steps 3 through 6 adjusting R4 for the mark offset and RZ for the space offset.

DAC

DM. S. 4 MARK AND SPACE DTC OFFSET

Proceed as follows:

1. Connect the output of the message generator to the data input of the tone keyer.

2. Connect the FSK output of the tone keyer as illustrated in Figure 5-2 of the Model 1200A (or 1273) Instruction Manual, with the FSK signal connected to pins 10 and 11 of TBl.

3. Make certain that the message generator and tone keyer are set at the proper baud rate and mark and space frequencies.

4. Connect distortion analyzer between pin 7 and pin 10 (ground) of Jl7.

5. Set message generator for steady mark output.

6. Set the attenuator to zero and ensure that the input to the 1200A/1273 is 0 dbm; adjust the output level of the tone keyer, if necessary, to obtain 0 dbm.

7. Set the message generator to produce a reversals output.

8. Adjust attenuator to obtain a -30 dbm input to the 1200A/ 1273 unit.

9. Set distortion analyzer for polar input, bias distortion, filter control -- OUT, and for operation at appropriate baud rate (all equipment should be operating at the same baud rate).

10. Depress the SP MODE pushbutton on the front panel of the 1200A/1273 unit.

11. Adjust SPACE DTC OFFSET potentiometer R83 for the lowest distortion indication on the distortion analyzer.

12. Release SP MODE pushbutton and depress MK MODE pushbutton.

13. Adjust MARK DTC OFFSET potentiometer R86 for the lowest distortion indication on the distortion analyzer.

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SCHEMATIC REFERENCE 03738.

UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE 1/4W 1%.

3. WIRE MOLEX RECEPTACLE PIN FOR PIN WITH PC BOARD USING l3BOTL PINS. PIN 15 WILL BE l381TL AND REMAIN UNUSED.

4. UNLESS OTHERWISE SPECIFIED DRILL ALL HOLES NO. 55 ( .052) DR. & INSTALL 46410 GRIPLETS.

b NO. 68 ( .031) DR. FOR I.C 'S.

NO. 55 ( .052) DR. 18 PLACES & INSTALL EYELETS.

NO. 55 ( .052) DR.· 22 PLACES & INSTALL MINI-INSERTS.

NO. 52 ( . 063) DR - 10 PLACES & INSTALL ITEM 58.

NO 43(.089)DR. 3 PLACES & INSTALL ITEM 59,

NO 30 ( .128) DR · 17 PLACES & INSTALL ITEM 68.

NO 11 ( .191) DR · 5 PLACES & INSTALL ITEM 56.

l NO. 49 (.073) DR.- 8 PLACES & INSTALL ITEM 55.

� RESISTOR VALUES REQUIRED FOR DWG NO. ARE PROGRAMMED & WILL DEPEND ON CUSTOMER REQUIREMENTS.

� ITEMS 69 & 71 USED IN ACCORDANCE WITH CUSTOMER REQUIREMENTS AND/OR SPECIFICATIONS.

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> ·" ·"--.... �

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D3771

------�--- �----·-----·,; ........ _ -� ... �-·--.,.,-�,.,--,.,-..,..,- "'" ....... ---;·-�----�.-�;�· --------�

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NOTES:

1. SCH£MATIC REFERENCE 02817.

2. UN...ESS OTHERWISE NOTED OR ILL ALL HOLES NO. 5!5 ( . 052)

DIAMETER AND INSTALL _.6410 GRIPLETS.

I.C. 'S REQUIRE NO. 68 ( .031) DRILL.

NO. 30 < .128) ORILL-5 PLACES FCfl NO. 2188-U STANDOFF.

HO. 55 ( . 052) DRill - 2 PLACES FOR NO. 2331272 -1 MINI INSERT.

3. INSTALL STANDOfFS ON COMPONENT SIIX OF BOARD AND

SOLDER ON TRACK SIDE ONLY.

£, REMOVE NO. 192 BANANA PLUG FOR USE C»4 1204A.

5. SG301AM AND LMHBCN ARE INTERCHANGEABLE AND EQUIVALENT

& THE VALUE OF R7 A REV OF PC BOARD

& THE VALUE OF R7 B REV OF PC BOARO

& R35 USED ON B REV OF PC BOARD ON.. Y

. ..

2175 Hz

"" R7 IT\ Z2.3,4.5,Z6

Zl

C2 .CJ

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C4. 7 ,10,13,16

••

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Rll.20,26,32

R'9.18,2.C.30

R3

R2 R1

115

Rl3,14

R15

R34

R'6,12,21,27,33

Cl7 18 19 20

-4

Figure 7-3.

CVITO FIO£QUDICY.

312!5 Hz 27!50 Hz 3000 Hz

1 R35 7 1 R35 1 RJ> 7

1 R1 /1' 1 R1 /1' 1 R7

5 12,3 .... �.16 5 12,3,4,5,16 5 12,3, .. ,5.16

1 121 _l Zl 1 Z1

2 -fJ-!,C3 2 C2 ,C3 2 C2 ,C3 8 cs,s,.s.9,ll.l2,l-4.15 a C5,6,8,9,ll,l2,14,1 5 8 5,6,a.9,11,12 14,1 5 C4,7,10,13,16 5 C4,7,10,13,16 5 C4.7,l0,13,16

1 •• 1 R4 1 R4 • Rl0,l9,25,3l • RlO, 19,25, 31 • Rl0,19,a6,3l

R9 18.2· JO R9,18,2 .. ,30 •

• R7,16,22,28 6 • R7 16 22 28 /fi • R7 16.22, 211 ;; • Rll,20,26,32 • Rll, 20,26, 32 • Rll,20,26,32 • R9,18,24,JO

1 RJ 1 Rl 1 RJ

1 R2 1 R2 1 R2 I R1 ·I R1 1 "1 1 R5 1 •• 1 R5

R8,17,23,29 • AI l7 23 29 2 RU,U 2 RlJ,-U 2 RU,U

l Rl5 1 R15 1 R15

1 R34 1 R34 1 Rl4

5 R6,12,2l,27,33 5 Ats,l2,21,27 ,33 5 R6,12,21,2T ,33

• Cl7,li,U,20 • Cl7,18 19,20 • Cl7,ll,lSI,20

AIR AYR l/R

1 298 72XWR2K

1 29A RN'550l402F

5 29 UH.UCN

1 28 UHHCN

2 27 12FR123-1C

8 "" 12FR473-1C

5 25 00-100

1 24 ::5311�-l-101

• 23 72PR100HMS

22 RN6002 .. R9F

21 8R2F • l2c "" • 19 4992F

• l8 21R5F

1 17 86R6F

I 16 lOOOF

I 15 6650F

1 14 l593F

• 13 IOROF

2 12 RN6001002F

1 11 RCO'JQf'1.114K

1 10 RC07GF124K

5 9 RCOTGF473K • • SI:S5Y!iU203Z

.,. 7 46-410

6 •

POTENTI01o4ETER

RESISTOR 14K l/4W U INT CIR

INT CIR

CAPACITOR .Ol?Wm lDOV S CArACITOR .047MFQ LOOV 5

CAPACITOR lOot lKV POTENTIOMETER 10011:

POTENTIOMETER 1011:

RESISTOR ?. on '" " '" ?0 ' '" 49,9K

21,511:

86,611:

10011:

6650

169K

ton lOK 1/2'ff 11

1801< 1/ 4ft lOX

120K 1/4111 lOX

RESISTOR nK 1/_.W 101 CAPACITOR ,02MFD 25V

GRIPl.ET

BECKMAN

CORNING

TI

Tt

M!OWEC

�>�IOWEC

I CR I BOURNS BECKMAN I rno"'""

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AB

AB

AB

ERIJO

BERG

2 ,- 5 J 73 --,--?72-1 H NI INSERT MP 5

� 5

1

5 5 -I •

5 5 5 3 192 5 5 5 2 2l.S&.-14 1 il 1 l H01158 .VB

,,..,. IIIIQO ---

-3 -2 -I

Mark-Space Bandpass Filter Assembly Sheet 1, D2818

WASHER NO, 2 SPLIT LOCK s� BANA>IA PlUG S>4IfH

ST4NJOFF GTC

PC BOAR!l /6 1 F�C

--�� . -� I..IST Cll' MAn:IIUM.

627220

525358

060 .C2 D60UO

029043

029044

021010

&27020

627003

&24021

624009

625-!i40

625720

6241U

52 .C0 50

&24060

624210

625875

624005

625288

602720

602696

602636

021580

247065

40.4861

2 .. 6321

683842

f�;'-.. � -·-

CENTER FREQUENCY 2975 Hz 2125 Hz 3155 Hz 2755 Hz '23"55Hz 1955 Hz (500 H::z:

�-------+-�----------��-----------+-4----------�r-r-----------+-+-----------��-----------+-4--r-+------+------------�----+-----+----4

R35 1-. R7 J\

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R35 R7

R4, 10,19, 25,31

5 !Z2,3,4,5,6 1 17Zl:.,-,.-,..--,.-,---=­

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1 IR35 1 IR7

R4,10,19,25,31 Z2,3,4,5,6 Zl

Cl7 18,19,20 C4, 7,10,13 ,16

C2,3.5,6,8,9,ll,l2.U.15I 10 I C2,3.5.6.8.9.11.12.14,15ll0

7F: II\

1 I R35 1 I R7

5 IR4,10,19.25,31 Z2,3.4,5 .6 Zl

4 1 Cl7.18.19 .20 5 C4, 1, 10 .13, 16

7F: R35 R7

A4,10,19,25,31

Z2.3,4,5,6 Zl

C17,18,19,20 C4 ,7, 10,13,16

1t:: &

1 I R35 1 I R7

5 I R4,10.19,25,31

s I 12.3,4,5,6 1 I Zl

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c.c. 7 ,10 ,13. 16

ffi 1 I R35 l I R7

R4.10,19,25,31

12,3,4,5.6 Zl

Cl7 18,19.20 C4, 7, 10, 13. 16

-n; !i\

1 !680 l /6BC

686 68A 68

5 167 66 65

s I 64 � 62

61 60

72XWR2K I POTENTIOMETER 2K RN550l621F I RESISTOR 1.62K l/41'1' 1% RN5506341F I RESISTOR 6.34K 1/41'1' U

RN5504992F I RESISTOR 49.9K l/4¥'1 lX

72PR20 I POTENTIOMETER 200 3389P·l·lO)J POTENTIOMETER lOOn 72PR50 POTENTIOMETER SO!l UH48CN I INT CIA U4741CN I INT CIA 5835Y5U2032J CAPACITOR .02!o!FO 25V

BEC)QoiAN) 62722C CORNING I 624424 CORNING I 625079 CORNING/ 625 721

BECKMAI\ I h?7nn"' BOURNS / 62702C

BECK)oiAN I 627013 NAT 060142 NAT 060140 ERIE '52'Tm

00100 lOPf lKV I CR:... 02101C 12FR333 -1C .033HFO 100V 5'-l t<�IOJI'EC 02904�

C2 ,3 '5 ,6 ,8' g' 11,12,14,15/ 10 I C2, 3. 5, 6, 8' 9,11, 12' 14.151 lO J C2 ,3 ,5 ,6 ,8. 9,11,12: '14' 151 lO I C2 '3 ,5 ,6 ,8 '9 .11, l2' lo4 ' 1.5\10 59 12FR473-1C 047!o!F"O 100V SX I Joi.IOIIIEC 02904<1

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--·· -----·-·-R3.9.18.24.30

Rl

R15

I

R6,l2,21.27,33,34 R6 .12 .21.27.33 ,34 AIR

2

-II - 10

£ THE VALUE OF R7 FOR A REV OF PC BOARD _& THE VI.LUE OF R7 FOR 8 REV OF PC BOARD

.&_ R35 USED ON 8 REV OF PC BOARD Otl... Y

Rl3,14 Rl3,U

R5 ,11 ,20 ,26 ,32 A5.11.20,26,32

R3,9.18.24.30 R3,9,18,24.30

Rl,7,16,22,28 "AK" Rl. 7 .16. 22.28 �

Rl5 Rl5 R34 RJ<

R6,12,21.27,33 R6.12 .21.27 ,33 A/ A/R

2 2

-9 -8

Figure 7-3.

C2 ,3 .5.6, 8, 9, ll,l2.1-4.15 10 I 58 57 56

Rl3 ,14 2 IR13 .14 Rl3.U 55 2! R5,11,20.26.32 53 52

R5.ll,20,26,32: 5 115.11,20,26,32 51 50 49 48

R3.9,18,24,30 ., R3,9,18,2.C,30 46

R3,9.18.U.30 45 44

Rl,7,16,22.28 � 5 IRl. 7 ,16,22,28 � .. Rl,7.16.22.28 ""it\ 42

Rl5 1 1Rl5 ., 1- I R34 1 IR34 40

39 R15. 34 2 I 3B

R6, 12,21,27,33 5 IR6,12.2l.27,33 R6,12.21.27.33 37 .,. A/R /R A/AI 36

35

12FR103-1C RN60Dl502F

2551F l002F � 2373F

1962F

24R9F •3R2F" 49R9F" lOOOF

'"I;R?r: 1911F 9761F

CAPACITOR .Ol�<�:fO lOOV 5X f Jo�.ICftEC 024396 RESISTOR 15K 1121'1 U !CORNING 62537&

2. 55K 6245SL lOK 625288 lL.!r illill 237K 62589C

19 .6K 62548 �

2ol .90 624021 ol3 .211 624045 49. 9!l 62ol044 loon 62oi06C

?< )An""� 1. 91K 62448G 9 76K 625252

RN6007872F 7B.7K l/211 u \CORNING I 625797 RC07GF"333K 33K 1/ollll lOX I AS I 602612

223K 22K

' 27-4K I f 270K RC07GF473K I RESISTOR 47K l/4111 lOX 46410 I GRIPLET

6025-88 T

lB 602H4 lB 602636 BERG

34 2331272-1 I MINI INSERT AMP I 247065 33 32 31 30

-7 --6 -5

Mark-Space Bandpass Filter Assembly Sheet 2, D2818

USHER 2 SPLIT LOCK 192 I BANANA PLUG 2188-U I STANDOFF NOll 58 .l/8 I PC OO.lRO �

SST I 40ol86). �ITH I 24632� CTC I 683842 FEC

���:�::..: l..IITOI'"W"Tt;"\At...

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2100 H:�:

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Fll6.22,28

1700 Ht

tt; ' I"' 1Tri1 a\_

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R9,l8 .2-4.30 '5 ! .R5,11,20.26.32

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Rl6.22.28

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R35

R7

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4500 H%

R3, 9 ll 24 30 R�.ll.20.26.32 R1 7,16,22,21 @

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-•-:s-:·6· 5--, li.l .•. s-.5

ZZ.3.4.5.6 Z1 1 I Z1 Zl C17.l8.19.20 -4 IC17 .18.19.20 C17 .18.19.20 C-4.10.13.16.7 I 5 C4,7,10,13,16 5 C4.7.10.13.16

C2 .3.5.6.8.9, 11,12.14,15 10 C2 ,3,!1 6 8 9 11 l2 l-4 15 10 Rl3 .14 2 R13 .l-4 2 R12 21.27,33,6 5 R6.12.2l.27.33 5 IR6.12.2l.27,JJ

AIR

18 17 -"-16

& THE ¥ ALUE OF R7 FOR A REV OF PC BOARQ

__1, THE VALUE OF R7 FOR i REV OF PC BOARD

� RJ� USED ON 8 R£V OF PC BOARD ONlY

/R

. ,

15

Figure 7-3.

14

2015 H'l:

R35

Rl5

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_ll __ _ Cl"r,ll,l9,20

R3

R15

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1115 H2

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122

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103

101 loCi ..

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AIR

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517-4 A/R 73

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� RH5505-492F

,p,

RESISTOR 49 91!\ 1/-411 RESISTOR 97.611 l/211 U RESISTOR 57 6K 1/-411 U:: RESISTOR 5-4 9K l/-411 POTENTIQio4ETER 500

!!!! �

CORNING ....­AS BOURNS

� 625746

= 627010

RN5501020F I RESISTOR 10211 l/4111 lX CORNING I 62-4136 RH5502151F RESISTOR 2.15K l/4W U CORNING 62-4499 RN550887lF RESISTOR 8. 87K 1/4JI U: CORNING 625236

RN550l370F RESISTOR 1370 1/4111' U CORNING 624110 RN5S04322F RESISTOR 43. 2K 1/4" U CORNING 625683

POTENTIC»>ETER 10011 B RNS 6 70 RN5501500F RESISTOR lSDn l/41t U CORNING 624135 RN55015-42F RESISTOR 15.4K l/4111 U:: CORNING 625380 72PR200 POTENTIOio4ETER 2000 BECKMAN 627026 RN6001001F RESISTOR 111: l/411 lX COON NG 62.t300 RC07GF474J RESISTOR --4701( l/4W 5� AS b01897 RC07GF56-4J RESISTOR 560t< 1/411 SX AS 601920 RN6004JR2F RESISTOR ·U 2(1 l/2'111 lX CORNING 62-4048

RH6002373F RESISTOR 237K 1/2"1 U; CORNING 625890 RN&0071112F RESISTOR 78 TK 112'111 U CORNING 625797 12FR10l·lC CAPACITOR OH4FO 100¥ SX MIOffEC 029042

POTENTIOMETER lOll AOURNS 6:21004

RC07GF124K I A£SISTOR 1201< l/41 10:.; SGJOlAM I IIH C IR 12FR-473-1C: RC07GF33-4k

RN 1 4 F RN6002002F

.. 602696 5G '(i'5QQ'8o'

Rt-160060-421=' t 60 Ak 112'111' U CORNING 62�1-49 RN600�9ROF RESISTOR 590 liZ" ll RN60Q-4991F RESISTOR 4 991C. 112ll U

33.39f' ·l -101 I>OITNT IOMETER 100Q

CORNING 624042 CORNING 62-4890

BOURNS 627045 LM7-48CN !NT CIR NAT 0601A2 UH41CN !NT CIR NA.T 0601-40 !!>I:S5T�U203Z C'-.PA.CI TOR 0214"0 25V ERIE 021�80 00100 C.u>A.CITOR lOot lKV CRL 12FR333-1C C.lPA.CITOR .033MF0 100V 5\ MIO'JIEC RN6001002F RESISTOR lOK l/211 U; CORNING RC07GF47JI( RESISTOR -471( 1/AII lOX AS 46-410 GRIPLET BERG RN5508250F RESISTOR 82�0 1/-4" U CORNING

2331272 ·1 MINI INSERT Afr4" USHER 2 SPliT LOCK SST

192 BAHI.NA PLUG SMITH 2181·1-4 STANDOFF CTC

021010 � 625288 602636

624241 "277'06'5

J2.!W.. 246321 �

·��··�

Mark-Space Bandpass Filter Assembly D2818, Sheet 3

("') z z

rHZ

R4.10.19.25,31

-24

&, THE VALUE OF R7 FOR A REV OF PC BOARD /b. THE VALUE OF R7 FOR B REV OF PC BOARD � R35 USED ON B REV OF PC BOARD ONLY

1 R7

R1

2 R:

R: 5

R9

�

. 10

�-.•. 5 . 6

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. L..!.£.13.16

.M. ,14

23

-I

CENTER FREQUENCY

9'i5"i1'Z

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R7

R1 R7 Rl6,22 .28

I RS ,11,20.26 .32

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R1 5 R4 10 19 25.31

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10 1::.2 3 5 6 6,9,11 l2 .14.15 10 C2.3,5.1

2 RlJ.H 2 Rl3,l.t

5 R6,l2.21,27,33 5 A6,12 .21,27, 33

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5 ]AIR

5 5 1

I -19

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' "

RESISTOR l.15K l/41'1

RESISTOR 4420 1141'1 1%. RN6003400F RESISTOR 3400 1/211 U. RN55Dl821F RESISTOR l 82K l/411 1\ RN55Dl50lF RESISTOR 1 5K l/4YI' 1);: 72PR100 POTENTIOMETER 100!! RN55Q243lF RESISTOR 2 43K l/41'1 AN55D5490F RESISTOR 5490 l/41'1 l

RN5501911F RESISTOR l 91K l/41'1 5503631F R�iSTOR 3 63K l/4V.

TOR 19 lK l/411 TOR 39. 2K l/21'1 TOR 7320 li2W TOR 6190 l/41'1 TOR 9760 l/41'1

� TOR

� 4 K l/ 41'1

j5506040F RESISTOR 604!1 1/ll'l 1:. 07Gfl54K RESISTOR 150K l/41'1 10\

bl< &2532:.

l'\H!NIN•· rLt4i5� ' "

('IW\NIN<. 1,;!4 I !l!INik•• 1,14 I PIINI

1_,.& RN5503480F RESISTOR 348:-J l/Al'l ll:. ���-�' )4�+- -+RN5504020� :�����g: :0��\� 1;�:

1'1:

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!38

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130

� rn

A£ S I STQR 3 74K 11� 72PR:OOO POTENTIO�trT£A 500!

RN5�01877f RESISTOR 18 7K l/-41'1 .J..7?PA1K POTENTIOM[TER 1K RESISTOR 9310 1/41'1 POTENTJOMfHR 2000

.;:;H'-'•""• ""-+.'��'-::"-\"'5 ;:,;;:�A 909fl 1 nw

llC"' JNT CIA

35Y5U2037 CAPACITOR 02MF0 25V 00100 CAPACITOfl lOo I li<V 17FR3J3 ·lC CAPAC! TOR OJJMFU 1001

AN6001007F RESISTOR lOK 1/Al'l U. RC07E>F473K RESISTOR A7K l/<11'1 10:..

I .(6.410 E>RIPl

2J.3l:12. �

! P!HJI

Ill' 1<MAt {(If�

1<MM '" �tJ]I,7702!.

111 ro:

WASHER 2 SPLIT LOCK •,',I A0486

BANANA PLUG •,Mill! i'A6J2

STAND€1FF (I< 68384

PC BOARO ••.:.•..-.._ 11.!::-r-1 �!l'_,.�.�c,

lltTOI' ...... TfO.!AL

Figure 7-3. Mark-Space Bandpass Filter Assembly Sheet 4, D2818

I······�' 1�··-

ji �·

I

£ THE VALUE OF R7 FOR A REV OF PC BOARD

fb. THE VALUE OF R7 FOR B REV OF PC BOARD

ft:. R35 USED ON 8 REV OF PC BOARD ONLY

850-Hz

=�5 lE

R5,11,20,26,32

R9.l8,24,30 ., R22,28 R l 6 R 7 Ri fiTs . ,.

R4 ,10,19.25.31 Z2 .3.4.5,6 ll Cl1.18,19.20 C-4.7 ,10,13.16

A;\

_il!!TER FR£QIJENCY 0 "' 1620Hz

R35 � R7

R5.11,20,26.32

R24,30 Rl6

.'!! .,

R22.28 � :� & Rl5 ., . R4.1C.l9.25.

Z2.3.4.5.6 Z1 Cl7 .le.l9.20 �6

-.

RJS

R7

., R9.18,24,30

R1

.,. R5,11,20,26,32

R16.22 ,28 R15

R4,10.19,25,31 �.3·;-.. -.-�-.6

C17 ,18.19.20 U.io.I3.l6.7

7£.. """"?£

C2,3,5,6,8.9,U.ll.U.l5 10 CZ.3.5.6.8.i,ll.U,l41.15 10 C2,3, .6.!1,9,11.12.1-4.151 10 Rl3 14 2 Rl3 14 2 Rl3,l R6,l2,21.27,33 5 Rl2.21,27.33.6 5 Rl2,21,27,33,6

36, 35 34

2180H;,:

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., R9,16.H.30 "" Ri5

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�32 Rl6,;;:2,28

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lrr Cl7.18.19.20

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i 321 27'

.ill 272 m 270

� 268 267 266 265

ii! � 262 ill 260 259

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251 250 "'

1 ,m

R5 .11 ,20 .26 ,32 5 4 R3,9,lB.24,30 5 ?44 Rl 1 4

Fl4,l0.19.25,31 l2.3.4.5.6 Z1

Cl7 ,16 .19,20

1 " 5 1 241 5 12•Q i"""G39 4 1 238

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RN5502431F RESISTOR 2 43K l/411' 1\ AN5505621F RESISTOR 5.62K l/411' 1\

R K l/411' l\ RN55D3922F RESISTOR 39.2K l/411' B. RN5503740F RESISTOR 3HO l/41'1 U

RNS503830F RESISTOR 3630 l/4� D.

RN5504640f' RESISTOI'I 4640 lf4!'j U; RNS506190F RESISTOR 6190 1/41'! D.

RNSSOUOOF RESISTOR 130!1 1/41'1 a RN5501430F RESISTOR 143(1 l/4111 lX RH5!101912F RESISTOR 19 1K l/4\11 U; RN550l212F RESISTOR 12 lK 1/<1" 1\ RN5503631F RESISTOR 3 83K l/4\11 1\. RN550191lF RESIS"TOfl 1 91K l/4W 1� RC07GF273J RESISTOR 27K 114\11 S'X RC07GF563J RESISTOI< 56K l!4W 5,.; 72PR500 POTENT!�ETER 500!1 RN5501620F RESISTOR 1620 l/4!'1 a

RN5501580F RESISTOI< 1580 l/411 lX RN55090R9F R£SJSTOR 90 90 l/41'1 U.

RN55086R6F RESISTOR 86 60 l/41'1 It

RC07GF163J RESISTOR l6K l/41'1 5:. RC07GF105J RESISTOR 1 I>IEG l/41'1 5\. 72PR50 POTENTIO�ET(R SOfl RN5502151F RESISTOR 2 lSK 1141'1 l� RN550867lf RESISTOR 8 67K l!4W 1\.

RC07GF24.3J RESISTOR :?4K l/41'1 511.

RN5504322F RESISTOR 43 2K 1141'1 n

Rloi5502152F RESISTOR 21 5K 1/41'1 U

RC07Gfl?4K RESISlOG 120K l/41'1 10� RN550105U RESISTOR 10 SK l/41'1 1).

RN550267lr I RES1SJ.Ofi._Z.6 7

72PR100 j PQT[Nli�[T(R 100!1 SG30U.H l iNT CJR L�741CN INT CIR 5835Y�U203Z CAPACJTOP O?MFO :i'5V 00100 CAPACITOR lOp/ lKV

l2FR333·lC CAPACITQP .033MFO lOOV 5% RN6001002F RESISTOR lOK l!?W lX RC07GF473K RESISTOFI 47K l/MI lOX 46410 GRIPLE'T

2331212·1 I MINI INSERT I'IASH(R 2 SPLIT LOCK

192 BANAN..l PLUG 2188-14 STANOOr:'F NOll 58 _.,B PC BOARO

Figure 7-3. Mark-Space Bandpass Filter Assembly Sheet 6, D2818

B�i.N-CORNINC 624559 CORNING 625035 CORNING 625098 CORNING 625622 CORNING 624146 CORNING 624149 CORNING 624155 CORNING 624181 CORNING 624116 CORNING 624115 CORNING 625484 CORNING 625321 CORNING 624720 CORNING 62 .. 479 .1.8 60167'2 .I.B 601752 BECKMAN 627084 CORNING 624H1 CORNING 6241H CORNING 624903

CORNIW> 624902 AB 601600

AB 601980 BECKMAN 627013 COR�JN[, 6?4499 COR�:JNG 62523�.

AB 601656

CORNING 62:':>68-' CORNING 625540

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060060 060140

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� 602636 BERG

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r�� :.2.21.21 . . B 2

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L3 - 4 2

� T HE VALUE O F RT FOR A REV O F PC BOARD � il-l[ VALUE OF RT FOR 8 REV OF PC BOARD .:b. R35 USED OH B REV OF PC BOARD OHL Y

nn n stz &v·

CEHTER FREQUENCY 25Hl 2200 H% I 1800 H<t

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[sifJ-5Y5U203Z CAP.lcifOR -.-02 )()100 CAPACITOR

rt07GF47.1K RESISTOR 2331272 · 1 �IN I- INSERT -

USHER N0.2- SPLITL-0CK----r5Si BAHA.NA PLUG 192

'i"'8'a."H 'ere

� � ..... ...,

�

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2!2.. !!9--580

270 636

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Figure 7-3. Mark-Space Bandpass Filter Assembly Sheet 7, D2818

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_... -

2660Hz 2250Hz ,. ...

RS.ll.20,26.32 Rl5 Rl6 22 28 R1 i7

5

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2t77 .&H:a:

R35 l I R35 R35 lTR3'5 l )RJS 1 I A35 7F: 1 1135 7i\ " -a:.

R1 R1 l f R7 1 I R7

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R1

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R2 .8.17.23.29

RA_}O,Hl,25.3

12.3, ... 5.6 Zl

R:5,9.ll.24.30

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5 I RA,lO,l9.25.:H Rl6

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£

R3.9,U.2-i.30 1 M22.28

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Rl6 R1 ?\ iii

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C2.3,5.6.1.9.U,l2,H,15 10 C2.3,5,6,8,9,ll,l2,U.15 10 C2,3,5.6,t 9,11 12,14 15 10 C2.3.5.6.1.!11.ll.l2,14,15 10 C2,3.5,6.1,9,ll,l2-.l4.l!I J IO R13.14 2 Rl3,14 2 Rl3.H 2 R13.14 2 R13,lot R6,12.2l.27.33 5 R6.12.2l.27,33 5 R6,12.21,27.33 5 R6.12.21,27,33 5 R6.12,2l.27.33

50 49 4B 47 46

&_ TIE VALUE OF R7 FOO A REV OF PC BOARD /b. THE VALUE Df R7 FOR 8 REV OF PC BOARD /A R35 USED ON B REV OF PC BOARD ONLY

R22 ,28 � R5 .11.20.26. 32 RA,l0.19.2!S.ll Jf3.9.10..2A,30

R16 R1 ---;!!;" iii Z2 ,3,4.5,6 Zl

R1

'" R15 Al6.22.2! R1 i5':11.20.26,32 RA 10 19 25 31 R3.9,ll.2-i,30 -.1-

--

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7i\

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'

45 44

"' 520 52C 528 2£_A

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1 \3A9 � "'

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'" ill ill ill no

Jill H"'­>Ti'27 5 326 5 325 l 32-4

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5 ill 1 318 .. 311 5 316

10 315 "'

� 313 m

ill ill 309

1 1308

FIH5506.492F RESISTOR 64. 9K l/0 1% CORNING RH6001Zl3F RESISTOR l21K 112ft 1% CORNING I .6251!,1 RNSSD2322F RESISTOR 23. ZK l/4JI U CORNING 62556 RHS501052F RESISTOR lO.SK l/4JI 1% COANU�G 62�£9.� RN55Dl622F RESISTOR 16.21< li·H' U: CORNING 625397 RN600l303F RESISTOR l30K l/2ll 1% CORNING 625830 RN5502942F RESISTOR 29 .4K 1/.nl lX CORNING 625614 RN5505762F RESISTOR 57 .6K l/.41'1 U: CORNING 625746 72XWR2K POTENTI�ET£R 2K SECKMAN 627220 RHSS04991F RESISTOR .4. 99K l/.4ft U: CORNING 624891

NS�l91F RESISTOR 6.19K l/.4W 1% CORNING 625072 RN550l-A02f / RESISTOR lAK l/A" lX CORNING J 625358 RN550A022F I RESISTOR 40 U. 114111 h I CORNING \ 625673 RN5502672F RESISTOR 26 7K 114W lX CORNING 625597 RN5508061F RESISTOR 8.06 ... l/4'/11 lX CORNING 625181 RC07GFll4J I RESISTOR 1101< l/4'/11 5X 6018-iS RN5508062F f RESISTOR 80 6K l/4W lX J CORNING I 625798 RN55DlOR1f" RESISTOR 30 1\1 lH'/11 lX CORNING 62-i062 �550.4021F RESISTOR .4.0:ZK l/AW 1X CORNING 62A190 RN55023R7F RESISTOR 23 70 11-41'1 lX CORNING 62-4049 RH6007502F RESISTOR 75� 1/2111 lX CORNING 625792

RH5501003F RESISTOR l()Ofi 11-4" U: CORNING 625Bll RN55023R7F RESISTOR 23 711 1/4111 lX CORNING 62AO-i RN55016R2F RESISTOR 16 2fl l/-41'1 1%. CORNING 624027 RN550l000F RESISTOR 100;1 l/4" lX CORNING 62.41?2 RH550H52f RESISTOR .(7 SK 1/.(W U: RC01GF"I.2.3J RESISTOR B2K l/4ff 5X RN5�762F" RESISTOR 91 61\ 1/U 1% 71PR100 POTENTIOMETER lOOn RN550-i9R9F RESISTOR 49 9\1 1141'1 lX RN5504753F RESISTOR 4751\ l/4" 1X RN5503013F I RESISTOR 301K l/4'/11 lX

COR,..ING 625701 AB 601816 CORNING 62!>808 BECK�AN 627021 CORNING 62.400.4 COOtHNG 626024 CORN1NG I 62599&

RN55056?ZF I RESISTOR 56 2K 1/41'1 lX I CORNING I 625Hl RH5502262f RESISTOR 22 6K 1/4" 1X CORNING 625562 RH5501183f RESISTOR 1111< 1/-iW lX CORNING 625815 33399·1·200 POT(NT10M£TER 200 ROURNS ,;nnn; RN!l'!Xll8R7f" RESISTOR 18 70 l/4fll 1% CORNING 62-i033 RN5505621F RESISTOR 5 621< 11-4111 IX CORNING 62503� 3l39f'·l·Ml0 POTENTIOJoETER son RN550lil2F RESlSTOR 19 lK 1/ .. 1'1 1:t CORNING 625-il!.-i RN5509531F RESISTOf II 53K CORNING 6252U RN5504751F RESIS'tOR 4. 7�K CORNING 624179 SG301A� INTEGRATED CIRCUIT SJGNETIC 060080 U041CN INTEGRATED CIRCUIT NATIONAL 060UO 5835Y U203Z CAPACITOR 02uf 25V ERIE 021580 00100 CAPACITOR l0Qf lKV CRL 021010 12FR333·1C CAPACITOR 033ul lOOV 5X �ID,..EC 029045 RN5501002F" RESISTOR lOK 1/4JI lX CORNING 625?70 RC07Gf"o(73K RESISTOR 47K 1/.(JI lOX AB 602636 23312 2-1 �INI-IHSERT AMP 247065

"ASHER N0.2 SPLIT LOCK SST .t04Af'>l 192 / BANANA PLUG z:i.t�·f4 I su.NooH HOii5i-.ve -·· ·1 Pc BoARD --r7f.,

SNITH 248321 CrC � '"

Figure 7-3. Mark-Space Bandpass Filter Schematic Diagram Sheet 8, D2818

...... - �

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t.

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