Gables Engineering G7490-07 Manual

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 ([e-mail])
[phone] Fax: [phone]

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

Pilot’s Guide G7490-07
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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Pilot’s Guide G7490-07
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
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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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