Com Swap Function; Aircraft Radios & Navigation; Speaker Output; Pa Function - Garmin GMA 340 Pilot's Manual

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If the COM radios utilize a "transmit interlock" system, the split COM function

may require that this feature is enabled. Refer to the radio installation manual

for guidance. GARMIN makes no expressed or implied guarantees regarding

the suitability of the split COM feature in a given installation.

COM Swap Function

The GMA 340 allows the use of a remote mounted switch (typically on the yoke) to alternately

transfer the active microphone back and forth between COM1 and COM2. Pressing the remote

switch will have no effect if COM3 is the active transceiver. Ask your

Aircraft Radios & Navigation

Audio level is controlled by the selected NAV radio volume control.

Pressing NAV1, NAV2, DME, ADF (16), or MKR (2) (see MKR Beacon Receiver) selects each

audio source. A second button press deselects the audio. In addition, the GMA 340 provides inputs

for an unswitched aircraft radio (TEL RINGER) and an un-muted, unswitched aircraft radio (ALT

WRN).

Pressing the SPKR button (12) selects the aircraft radios over the cabin speaker. The speak-

er output is muted when a COM microphone is keyed. The GMA 340 speaker output level can

be adjusted by your installing agency.

The PA mode is activated by pressing the PA button (11). Then, when either the pilot' s or

copilot' s microphone is keyed, the corresponding mic audio is heard over the cabin speaker. If the

SPKR button is also active, then any selected speaker audio is muted while the microphone is keyed.

The SPKR button does

copilot PA microphone speaker levels are adjustable

NOTE

not have to be previously active in order to use the PA function. Pilot and

NOTE

by your installing agency

installing agency

for details.

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