Garmin GMA 340 Pilot's Manual - Page 4

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Also for Garmin GMA 340: Pilot's Manual (12 pages), Supplemental Operation Manual (10 pages), Pilot's Manual (4 pages), Installation Manual (43 pages), Pilot's Manual (8 pages), Pilot's Manual (12 pages)

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Garmin GMA 340 Pilot's Manual
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).

Speaker Output

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.

PA Function

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
3
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.
.