Cub Crafters CC18-180 Pilot Operating Handbook page 274

SECTION 9.7 CUB CRAFTERS
SUPPLEMENTS-GMA 340 CC18-180
ON/OFF, PILOT INTERCOM SYSTEM (ICS) VOLUME
CONTROL
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To turn the GMA 340 ON rotate the small knob, , past
the click. The knob then functions as the pilot's ICS
volume control. A fail-safe circuit connects the pilot's
headset and microphone directly to COM1 if the power is
interrupted or the unit is turned off.
TRANSCEIVERS
Both MIC and audio source may be selected by pressing
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any of the buttons labeled, , (COM1 MIC, COM2 MIC,
COM3 MIC). The active COM audio is always heard on
the headphones.
In addition, each audio source can be selected
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independently by pressing COM1, COM2 or COM3, .
When selected in this way, they remain active as audio
sources regardless of which transceiver has been
selected for transmission.
When a microphone is keyed, the active transceiver's
MIC button LED will blink for approximately one second
to indicate that the radio is transmitting.
NOTE
Audio level is controlled by the selected NAV radio
volume control
REPORT TC10000AFM
Issued: 5/31/05
Page number 9-7-6 Date of revision: 12/06/05