Garmin GMA 340 Panduan Pilot - Halaman 5

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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 COM 1 and COM 2. Pressing the remote switch

will have no affect if COM 3 is the active transceiver. Ask your installing agency for details.

Aircraft Radios & Navigation

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

Pressing NAV 1, NAV 2, DME, ADF 1, ADF 2(16), or MKR (2) (see MKR Beacon Receiver, page 8)

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

unmuted, unswitched aircraft radio (ALT WRN).

Pressing the SPKR button (12) selects aircraft radios over the cabin speaker. The speaker 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 not have to be previously active in order to use the PA function. Pilot and copilot PA microphone

speaker levels are adjustable by your installing agency.

The GMA 340 and 340H provide two stereo entertainment inputs: MUSIC 1 and MUSIC 2. The 340

Dual ADF has only MUSIC 1. MUSIC 1 is soft-muted during all aircraft radio activity and normally

during ICS activity. MUSIC 2 is a non-muted input. These inputs are compatible with popular portable

entertainment devices such as cassette tape or CD players. The headphone outputs of these devices are

used and plugged into MUSIC 1 or MUSIC 2. Two 3.5 mm stereo phone jacks should be installed in a

convenient location for this purpose. MUSIC 1 and MUSIC 2 have characteristics that are affected by the

active intercom mode. Refer to the table on page 7.