Garmin GMA 340 Manuel du pilote - Page 5

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Également pour Garmin GMA 340 : Manuel du pilote (12 pages), Manuel d'utilisation supplémentaire (10 pages), Manuel du pilote (4 pages), Manuel d'installation (43 pages), Manuel du pilote (8 pages), Manuel du pilote (12 pages)

Auxiliary Entertainment Inputs

The GMA 340 provides two stereo entertainment inputs: MUSIC1 and MUSIC2. MUSIC1 is

soft-muted during all aircraft radio activity and normally during ICS activity. MUSIC2 is a non-

muted input. These inputs are compatible with popular portable entertainment devices such as cas-

sette tape or CD players. The headphone outputs of these devices are used and plugged into

MUSIC1 or MUSIC2. Two 3.5 mm stereo phone jacks should be installed in a convenient location

for this purpose. MUSIC1 and MUSIC2 have characteristics that are affected by the active intercom

mode. Refer to the table on page 5.

Intercom volume and squelch (VOX) are adjusted using the following front panel knobs:

• LEFT SMALL KNOB—Unit ON/OFF power control and Pilot ICS volume. Full CCW detent

position is OFF.

• LEFT LARGE KNOB—Pilot ICS mic VOX squelch level. CW rotation increases the amount

of mic audio (VOX level) required to break squelch. Full CCW is the "HOT MIC" position

(no squelch).

• RIGHT SMALL KNOB—IN position: Copilot ICS volume. OUT position: Passenger ICS

volume.

• RIGHT LARGE KNOB—Copilot and passenger mic VOX squelch level. CW rotation

increases the amount of mic audio (VOX level) required to break squelch. Full CCW is the

"HOT MIC" position.

Each of the six microphone inputs have dedicated VOX circuits to ensure that only the active

microphone(s) is/are heard when squelch is broken. This represents a vast improvement over the

party-line systems and reduces the amount of background noise in the headphones during cockpit

communications. After the operator has stopped talking, the intercom channel remains momentar-

ily open to avoid closure between words or normal pauses.

The GMA 340 provides three intercom modes: PILOT, CREW and ALL. Mode selection is

accomplished using the PILOT and/or CREW buttons. Pressing a mode button activates the corre-

sponding ICS mode. Pressing again deactivates the mode. The ALL mode is active when neither

PILOT nor CREW LEDs are lit. To switch from PILOT to CREW mode, press the CREW button;

from CREW to PILOT, press the PILOT button. An LED ON indicates the isolation mode is active.