Rev. AV Page 25-2
NOTES:
1. UNLESS OTHERWISE NOTED, ALL STRANDED WIRE MUST CONFORM TO MIL-W-22759/16 OR EQUIVALENT.
2. UNLESS OTHERWISE NOTED, ALL SHIELDED WIRE MUST CONFORM TO MIL-C-27500 OR EQUIVALENT.
3. UNLESS OTHERWISE NOTED, ALL WIRES ARE 22 AWG MINIMUM. POWER AND GROUND WIRES MUST BE 20 AWG
4. SYMBOL DESIGNATIONS AND CONNECTOR GUIDANCE:
SHIELDED 2 CONDUCTOR
WHT
BLU
SHIELDED 3 CONDUCTOR
WHT
BLU
ORN
TIP (LEFT CHANNEL)
RING (RIGHT CHANNEL)
SLEEVE (LO)
NOTE 5
NOTE 6
STEREO JACK
HEADSET EAR SPEAKER
TIP (*PTT)
RING (MIC HI)
SLEEVE (MIC LO)
NOTE 5
NOTE 6
JACK HEADSET MIC
s
AIRCRAFT GROUND
SHIELD BLOCK GROUND
WIRE SPLICE
MOMENTARY CONTACT
PUSH BUTTON
TIP
SLEEVE
RING
STEREO
PLUG
TIP
SLEEVE
MONO
PLUG
NOTE 6
TIP
TIP
RING RING
SLEEVE SLEEVE
STEREO PLUG
INSERTED INTO
JACK
MONO PLUG
INSERTED INTO
JACK
RING SHORTED
TO SLEEVE
5. ISOLATE JACK SLEEVE (MOUNTING NUT AND NUT PLATE) FROM AIRCRAFT CHASSIS.
6. THE HEADSET EAR SPEAKER SLEEVE DIAMETER IS LARGER THAN THE HEADSET MIC SLEEVE DIAMETER.
7. THE CONNECTION BETWEEN PTT AND THE MIC JACK TIP IS REQUIRED IF HAND MICS WILL BE USED. *DENOTES AN ACTIVE LOW SIGNAL.
8. THE FUNCTION OF *DISC1 AND *DISC2 ARE CONFIGURABLE. *DENOTES AN ACTIVE LOW SIGNAL.
9. SPARE AUDIO INPUT.
10. CONNECTING PINS 25 AND 26 ADDS A 120 OHM TERMINATION TO THE GTR 20 CAN BUS. CONNECT ONLY IF THE GTR 20 IS AT THE END OF THE CAN BUS.
11. IF TWO COM RADIOS ARE INSTALLED THIS INPUT AND OUTPUT CONNECTS TO THE OTHER COM RADIO. *TRANSMIT INTERLOCK IN TO
*TRANSMIT INTERLOCK OUT AND *TRANSMIT INTERLOCK OUT TO *TRANSMIT INTERLOCK IN. *DENOTES AN ACTIVE LOW SIGNAL.
12. THIS OUTPUT CAN DRIVE A RECORDING DEVICE IF AN AUDIO PANEL IS NOT CONNECTED. A 3.5 MM JACK IS TYPICALLY USED.
ISOLATE JACK SLEEVE (MOUNTING NUT AND NUT PLATE) FROM AIRCRAFT CHASSIS.
13. THE GTR 20 IS CONNECTED AS COM 2. *DENOTES AN ACTIVE LOW SIGNAL.
14. MONO ONLY HEADSET JACK CONNECTION DETAIL.
15. NO NOTE.
16. THE ID STRAP INPUT IS FOR SETTING UP THE GTR20 TO BE IDENTIFIED IN THE CAN BUS SYSTEM AS EITHER A COM 1 OR A COM 2 RADIO.
FOR INSTALLATIONS WITH DUAL GTR 20 RADIOS LEAVE PIN 8 OPEN TO IDENTIFY THE GTR20 AS COM 1, AND CONNECT PIN 8 TO 27 ON THE SECOND GTR 20
TO IDENTIFY IT AS COM 2. FOR SINGLE INSTALLATIONS DO NOT CONNECT ANYTHING TO PIN 8 (LEAVE OPEN) TO IDENTIFY THE GTR20 AS COM 1.
NOTE 5. AUDIO JACK ISOLATION DIAGRAM
AIRCRAFT PANEL
SHOULDER
WASHER
FLAT INSULATED
WASHER
FLAT METAL
WASHER
METAL
NUT
AUDIO
JACK
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