flight id / atc / tcas

Pilot’s Guide G7490-07

Flight ID / ATC / TCAS

G7490-07 Pilot’s Guide Rev 01 COPYRIGHT © Gables Engineering, July 28, 2004 Author: Sylvain Cloutier ([email protected]) (305) 774-4400 Fax: (305) 774-4465

G7490-07 Pilot’s Guide Rev 01 COPYRIGHT © Gables Engineering, July 28, 2004

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Copyright © Gables Engineering 2004. All rights reserved. No part of this manual may be reproduced, stored in a retrieval system or transmitted in any form or by any means, mechanical, photo-copying, electronic, or otherwise, without the prior written permission of Gables Engineering, 247 Greco Ave, Coral Gables, FL 33146


TABLE OF CONTENTS

G7490-07 (Flight ID/ATC/TCAS) System Description..................................................... 1 Panel Controls and Indicators .......................................................................................... 1 XPNDR (Transponder) Select Knob ........................................................................ 2 IDENT (Identification) Button ................................................................................... 2 XPNDR (Transponder) FAIL Indicator ..................................................................... 2 FID (Flight Identification) Indicator ........................................................................... 2 ATC (Air Traffic Control) Indicator............................................................................ 2 Display .................................................................................................................... 2 Keypad Buttons........................................................................................................ 2 CLR (Clear) Button .................................................................................................. 2 ENT (Enter) Button .................................................................................................. 2

ATC/FID (Air Traffic Control/Flight Identification) Button ......................................... 2 ABS (Absolute) Button ............................................................................................. 2 RNG+ and RNG- Buttons ........................................................................................ 3 Mode Select Knob.................................................................................................... 3 STBY ............................................................................................................ 3 ALT OFF.......................................................................................................... 3 XPNDR ............................................................................................................ 3 TA ............................................................................................................ 3 TA/RA ............................................................................................................ 3 ABV ............................................................................................................ 4 BLW ............................................................................................................ 4 TEST Button ............................................................................................................ 4 Panel Operation Initiating a Functional Test ....................................................................................... 4 Setting the ATC Code .............................................................................................. 6 Setting the Flight ID ................................................................................................. 7 Accepting the Flight ID............................................................................................12 Selecting the Altitude Display Mode .......................................................................13 Selecting the TCAS Display Range ........................................................................14 Showing Absolute Altitudes on the TCAS Display .................................................16 Lamp Test (through a remote switch) .....................................................................16


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G7490-07 (Flight ID/ATC/TCAS) System Description This control panel is capable of controlling two Dual Mode-S transponders with TCAS and Flight ID capabilities. This guide describes the operation of the G7490-07 Flight ID/ATC/TCAS control panel.

Panel Controls and Indicators This section describes the control functions of the G7490-07 Flight ID/ATC/TCAS control panel. Refer to Figure 1 for location of controls and indicators.

1. XPNDR (Transponder) Select Knob – Rotate to select transponder system 1 or system 2. 2. IDENT (Identification) Button – Press to transmit identification information. 3. XPNDR (Transponder) FAIL Indicator – Illuminates when a failure is encountered. 4. FID (Flight Identification) Indicator – Illuminates when Flight Identification (FID) mode is selected. 5. ATC (Air Traffic Control) Indicator – Illuminates when the ATC mode is selected. 6. Display – Digital indication of ATC or FID codes. 7. Keypad Buttons – Press these buttons to enter the ATC or FID code. 8. CLR (Clear) Button – Press to go back one space, or press and hold for 2 seconds to clear display. 9. ENT (Enter) Button – Press to validate and transmit a Flight ID code. 10. ATC/FID Button – Press to switch between the ATC and the FID modes. 11. ABS Button – Press to change traffic altitudes from relative to absolute. 12. RNG+ and RNG- Buttons – Press to increment/decrement TCAS display range to 5, 10, 20, or 40 nm. 13. Mode Select Knob – Rotate to select mode. 14. TEST Button – Press to initiate functional test.

Figure 1 – G7490-07 Controls and Indicators G7490-07 Pilot’s Guide Rev 01 COPYRIGHT © Gables Engineering, July 28, 2004

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XPNDR (Transponder) Select Knob This knob is used to activate transponder 1 or transponder 2. Only one transponder can be active at one time.

IDENT (Identification) Button This button is used to transmit the ATC radar aircraft identification. Push this button when requested by air traffic control (“Squawk Ident”).

XPNDR (Transponder) FAIL Indicator This indicator is illuminated when the selected transponder fails (will not illuminate during failure if Mode Select Knob is set to STBY). FID (Flight Identification) Indicator This indicator illuminates when the Flight ID mode is selected. This indicator flashes when a Flight ID (Call Sign and/or Flight Number) is being entered. ATC (Air Traffic Control) Indicator This indicator illuminates when the ATC mode is selected. Display The display can show up to eight alphanumeric digits. An ATC code consists of only four numeric digits. A Flight ID code consists of a combination of letters (airline call sign) and numbers (flight number). Keypad Buttons These alphanumeric buttons are pressed to enter the ATC or the Flight ID code. Refer to “Setting the ATC Code” and “Setting the Flight ID” sections below. CLR (Clear) Button Use the CLR button to erase the last entered digit. Hold the CLR button for 2 seconds to erase all digits. ENT (Enter) Button Press the ENT button to validate and transmit the Flight ID code. The FID indicator will stop blinking when you press the ENT button. ATC/FID (Air Traffic Control/Flight Identification) Button This button is used to switch between the ATC mode and the Flight ID mode. ABS (Absolute) Button Press and hold the ABS button to momentarily change the altitudes shown on the TCAS display from “relative” to “absolute”. See “Panel Operation” below for more details.


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RNG+ and RNG- Buttons Press the RNG+ and RNG- buttons to set the range. The range can be set to 5, 10, 20 or 40 nautical miles (nm). Press the RNG+ or the RNG- button to show the current setting. Press RNG+ to increment or RNG- to decrement the range setting.

Mode Select Knob This knob is used to set the unit to one of the following seven modes:

STBY In the STBY(standby) mode, both Mode-S transponders are in the standby mode. In this mode there are no replies and interrogations. The TCAS system is OFF. Altitude reporting is also OFF.

ALT OFF In the ALT OFF (altitude reporting off) mode, there is no altitude reporting for either transponder. The selected transponder (1 or 2) is active. The non-selected transponder is in standby. The TCAS function is OFF.

XPNDR In the XPNDR (transponder) position, the selected transponder and altitude reporting are active. The TCAS system is OFF.

TA In the TA (traffic advisories) position, the TCAS system is ON. Traffic advisories are allowed. There are no Resolution Advisories in this mode. The Altitude Display Mode is set to Normal (N) and the TCAS system will only display and provide traffic information for targets located between 2700 feet above and 2700 feet below your aircraft (+2700 ft and -2700 ft relative to your aircraft).

TA/RA In the TA/RA (traffic advisories/resolution advisories) position, the TCAS system is ON. Both Traffic and Resolution advisories are allowed. The Altitude Display Mode is set to Normal (N) and the TCAS system will only display and provide traffic information for targets located between 2700 feet above and 2700 feet below your aircraft (+2700 ft and -2700 ft relative to your aircraft).


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ABV In the ABV (Above) position the TCAS system is ON and both Traffic and Resolution advisories are allowed. The TCAS system will only display and provide traffic information for targets located between 9900 feet above and 2700 feet below your aircraft (+9900 ft and -2700 ft relative to your aircraft). Refer to “Selecting the Altitude Display Mode” below for more details.

BLW In the BLW (Below) position the TCAS system is ON and both Traffic and Resolution advisories are allowed The TCAS system will only display and provide traffic information for targets located between 2700 feet above and 9900 feet below your aircraft (+2700 ft and -9900 ft relative to your aircraft). Refer to “Selecting the Altitude Display Mode” below for more details.

TEST Button Press the TEST button to initiate a functional test. See “Panel Operation” below for more details.

Panel Operation

Initiating a Functional Test Momentarily press the TEST button to initiate a Functional Test. The control panel will complete a self-check and initiate a test for the transponders and the TCAS computer. During a functional test the control panel indicators and display segments are all illuminated for approximately three seconds. After three seconds the display shows “CP1 PASS” and “CP2 PASS” in a sequence that depends on the position of the Transponder Select Knob. Refer to Figure 2 and Figure 3. The display will show “CP FAIL” if a failure is detected within the control panel. Other possible test sequences will occur if one of the two sides (1 or 2) is not energized (i.e.: If one of the circuit breakers is pulled) or in the event of a communication failure between the two sides. Refer to Figure 4, Figure 5, Figure 6, and Figure 7 for examples. If the selected side is not energized (power loss), the XPNDR FAIL indicator illuminates and the display is blanked.


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Figure 2 – Test sequence with the XPNDR Select Knob set to “1”

Figure 3 - Test sequence with the XPNDR Select Knob set to “2”

Figure 4 - Test sequence with the XPNDR Select Knob Set to “1”

and Module 2 not energized (i.e.: Circuit breaker pulled)

Figure 5 - Test sequence with the XPNDR Select Knob set to “2”

and Module 1 not energized (i.e.: Circuit breaker pulled)

Figure 6 - Test sequence with the XPNDR Select Knob set to “1” and communication problem between Module 1 and Module 2

Figure 7 - Test sequence with the XPNDR Select Knob set to “2” and communication problem between Module 1 and Module 2


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Setting the ATC Code Press the ATC/FID button to select the ATC Mode. The ATC indicator is illuminated and the display shows the last 4-digit ATC code entered. Refer to Fig 8.

Figure 8 – ATC Mode The ATC code can be set to any values from 0000 to 7777. To set an ATC code, use the keypad buttons 0 thru 7 to enter a 4-digit code. The new ATC code will be transmitted after 5 seconds. If you press the IDENT button before 5 seconds has elapsed, the new code will be transmitted immediately.

NOTE: Keypad buttons “8 VWX” and” 9 YZ” do not operate in ATC Mode. The display will show INVALID if you press one of these two buttons.

If you do not enter a complete 4-digit code, the display will revert back to the previous ATC code after 5 seconds. If you enter a wrong digit, press the CLR button to erase the last digit entered, or press and hold the CLR button to clear the entire display.

NOTE: 5 seconds after you press the CLR button, the display will show the previously transmitted ATC code unless you complete the code entry.

NOTE: If you press the IDENT button while the code entered is incomplete (if the code has less than 4 digits), the incomplete code is not transmitted and the previously transmitted code will re-appear on the display.


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Setting the Flight ID Press the ATC/FID button to select the Flight ID Mode. The FID indicator illuminates and the display will show the last 8-digit alphanumeric code entered. The FID indicator starts flashing when you press one of the keypad buttons to enter a new Flight ID. Refer to Fig 9.

Figure 9 – Flight ID Mode

The first alpha characters are called the Airline Call Sign. The Call Sign is retained in memory. To clear Call Sign, press and hold the CLR button for at least 2 seconds. The Call Sign and the Flight Number can be set to any values consisting of up to eight alpha or numeric characters. Any combination of numbers and letters from 0-9 and A-Z can be entered. If you enter a wrong digit, press the CLR button to go back one position. Set the Flight ID as follows:

1) Enter the Call Sign. The Call Sign consists of two or three alpha characters. Since the same keypad buttons are used to enter alpha or numerical characters, you must press a keypad button more that once to enter a letter. For example, to enter an “A”, you must press the “1 ABC” button twice (within 1.5 seconds). To enter “N”, you must press the “5 MNO” button three times. Refer to Figure 10 below for an example of the sequence using the “1 ABC” button. To enter the same letter twice (i.e.: AA) or if the two letters are on the same button (i.e.: V and X) you must wait 1.5 seconds after you enter the first letter before you press the same button again. For example, to enter VX you must press the “8 VWX” button twice (for “V”), wait 1.5 seconds, and then press the “8 VWX” button four times (for ‘X). Refer to Figure 11 for an example.


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Figure 10 – Alphanumeric sequence of keypad buttons


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Figure 11 – Entering the same alpha character twice


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2) After you have entered the airline Call Sign, enter the Flight Number by pressing keypad buttons only once. Refer to Figure 12 for an example where “123456” is entered after the Flight ID airline prefix.

Figure 12 – Entering the numeric portion of the Flight ID

3) To enter the same number twice you must wait 1.5 seconds after you enter the first numeric character before you press the same button again to enter a second character. For example, if you want to enter “77” you must wait for the cursor to move to the next position (occurs after 1.5 seconds). Refer to Figure 13 for an example. There is no need to wait 1.5 seconds if you press a different button.


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Figure 13 – Entering the same numeric character twice

4) The airline Call Sign (first alpha characters) is retained in memory. If only the numeric portion of the code needs to be changed, there is no need to completely clear the display by pressing the CLR button for 2 seconds.

5) To enter a new Flight Number (without changing the Call Sign), simply enter the new alphanumeric characters using the keypad buttons (refer to paragraph 2 and paragraph 3 above). See Figure 14. If you enter a wrong digit, momentarily press the CLR button to go back one position.


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Figure 14 – Changing the Flight Number keeping the same Call Sign

Accepting the Flight ID Before the Flight ID can be transmitted, you must press the ENT button. The FID indicator stops flashing when you press the ENT button. Refer to Figure 15.

Figure 15 – Accepting the Flight ID


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Selecting the Altitude Display Mode There are three available altitude display modes. The Mode Select Knob is used to select one of the three available modes. The three available altitude display modes are as follows:

ABV (Above) Mode – The ABV mode is active when the Mode Select Knob is set to the “ABV” position. The TCAS system will only display and provide traffic information for targets located between 9900 feet above and 2700 feet below your aircraft (+9900 ft and -2700 ft relative to your aircraft). N (Normal) Mode –The Normal (N) mode is active when the Mode Select Knob is set to any of the following positions:

• XPNDR

• TA

• TA/RA

In the Normal mode, the TCAS system will only display and provide traffic information for targets located between 2700 feet above and 2700 feet below your aircraft (+2700 ft and -2700 ft relative to your aircraft).

BLW (Below) Mode - The BLW mode is active when the Mode Select Knob is set to the “BLW” position. The TCAS system will only display and provide traffic information for targets located between 2700 feet above and 9900 feet below your aircraft (+2700 ft and -9900 ft relative to your aircraft).

Refer to Figure 16 for a visual representation of the “Above (ABV), Normal (N) and Below (BLW)” altitude bands of the TCAS system.


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Figure 16 – Altitude Display Modes

Selecting the TCAS Display Range To increase the TCAS display range, push the RNG+ button. The range can be set to 5, 10, 20 or 40 nautical miles (nm). The RNG+ has no effect once the display shows “RANGE 40” (there is no wrap around). To decrease the TCAS display range, push the RNG- button. The RNG- button has no effect once the display shows “RANGE 5”. Figure 17 shows the sequence when changing the TCAS display range.


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(Assuming current range setting is 5 nm)

Figure 17: Selecting TCAS Display Range with RNG buttons


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Showing Absolute Altitudes on the TCAS Display The altitudes normally shown on the TCAS display are relative to your aircraft. If you want to momentarily see the absolute altitudes, press and hold the “ABS” button. The TCAS display will show absolute altitudes for as long as you press and hold the “ABS” button.

Lamp Test (through a remote switch) A lamp test can only be initiated with a remote switch. The lamp test cannot be initiated through the front controls of the G7490-07 control panel. When a Lamp Test is initiated through a remote switch, all the display segments and indicators will illuminate. The display segments and indicators will illuminate until the Lamp Test is stopped but no longer than 2.5 minutes.


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Gables Engineering, Inc. 247 Greco Avenue

Coral Gables, Florida 33146 Telephone 305.774.4400 Facsimile 305.774.4465

“The Leader in Avionic Controls and Systems Since 1946”

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