ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED.
GROUND DESIGNATIONS: SHIELD BLOCK GROUND AIRFRAME GROUND
THE GMA 35 HAS 4 UNSWITCHED ALERT AUDIO INPUTS FOR ALERT AUDIO SOURCES SUCH AS TAWS OR
TRAFFIC.
TO PREVENT COUPLED INTERFERENCE AND GROUND LOOPS FROM BEING INJECTED INTO THE AUDIO
INPUTS, GROUND THE SHIELDS AT ONLY ONE END. EITHER END OF THE SHIELD MAY BE GROUNDED.
1
2
3
4
NOTES:
s
FOR REFERENCE ONLY. SEE THE G500 OR G600 STC INSTALLATION MANUAL FOR MORE DETAIL.
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FAILSAFE WARN AUDIO IN HI IS HEARD DURING NORMAL OPERATION AS A FIFTH ALERT INPUT. DURING
FAILSAFE MODE BOTH FAILSAFE WARN AUDIO IN HI AND COM 1 AUDIO INPUT ARE CONNECTED TO THE
PILOT HEADSET LEFT OUTPUT. DURING THIS TIME THE OUTPUT OF THE COM 1 RADIO AND THE OUTPUT OF
THE DEVICE CONNECTED TO FAILSAFE WARN AUDIO IN HI WILL BECOME SHORTED TOGETHER,
POTENTIALLY CAUSING DAMAGE OR INTERFERENCE. IF THE FAILSAFE WARN AUDIO IN HI IS USED,
INSTALL SUMMING RESISTORS IN SERIES BETWEEN THESE SOURCES AND THE INPUTS TO THE AUDIO
PANEL TO PROTECT THE OUTPUTS FROM DAMAGE. A TYPICAL VALUE FOR MIXING RESISTORS IS 390Ω ¼
W. THE AUDIO LEVELS OF EXISTING AUDIO SOURCES WILL HAVE TO BE RE-EVALUATED AFTER MIXING
RESISTORS ARE INSTALLED.
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