Garmin G1000 Pilot's Manual page 106

AUDIO PANEL
5.2 OPERATION
POWER-UP AND FAIL-SAFE OPERATION
Power-up
The audio panel performs a self-test during power-up.
All panel annunciator lights illuminate for approximately
two seconds. Once the self-test is completed, settings are
restored to the ones in use before the unit was last turned
off.
Fail-safe Operation
A fail-safe circuit connects the pilot' s headset and
microphone directly to COM1 in case power is interrupted
or the unit is turned off. In this case, audio is not available
on the speaker.
KEY ANNUNCIATORS
Pressing any key on the audio panel activates and
deactivates the function. Triangular annunciators above
each key illuminate to show when the function is on or
off (Figure 5-2). Annunciators do not illuminate on a
disabled function.
LIGHTING
Key annunciators and backlighting are controlled
automatically by the PFD.
TRANSCEIVER KEYS
The following four (4) transceiver keys appear at the
top of the audio panel front panel: COM1 MIC, COM2
MIC, COM1, and COM2 (Figure 5-2). COM audio can
be selected by pressing either the desired COM key or by
pressing a COM MIC key.
5-4
Garmin G1000 Pilot's Guide for the Beechcraft 58/G58
Annunciator
Disabled on Beechcraft
58/G58 Aircraft
Figure 5-2 Transceiver Keys
COM MIC Keys
Pressing the COM1 MIC key selects the COM1 radio
as the active transceiver. Pressing the COM2 MIC key
selects the COM2 radio as the active transceiver. The
receiver audio key, COM1, or COM2 is also selected.
The COM frequency is highlighted in green in the active
frequency field of the PFD and MFD.
Only one transceiver can be selected at a time. If
COM2 MIC is pressed when COM1 MIC is active, the
unit switches to COM2.
COM Keys
Pressing the COM1 receiver key selects the COM1
radio as an active receiver. Pressing the COM2 receiver
key selects the COM2 radio as an active receiver. Any
combination of radios can be selected separately or
simultaneously regardless of the active transceiver
selection. The active COM radio is always heard on the
headsets.
190-00629-00 Rev. B