Garmin G1000 King Air C90GT - Manual (Page 142)

190-00663-01 Rev. A Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT 128
AUDIO PANEL AND CNS
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
4.5 ADDITIONAL AUDIO PANEL FUNCTIONS
POWER-UP
The Audio Panels perform a self-test during power-up. During the self-test all Audio Panel annunciator lights
illuminate for approximately two seconds. Once the self-test is completed, most of the settings are restored to
those in use before the unit was last turned off. The exceptions are the speaker and intercom, which are always
selected during power up.
MONO/STEREO HEADSETS
Stereo headsets are recommended for use in this aircraft.
Using a monaural headset in a stereo jack shorts the right headset channel output to ground. While this does
not damage the Audio Panel, a person listening on a monaural headset hears only the left channel in both ears.
If a monaural headset is used at one of the passenger positions, any other passenger using a stereo headset hears
audio in the left ear only.
SPEAkER
NOTE: When the oxygen mask switch on the instrument panel is selected, each pilot’s microphone audio is
heard on the cross-side speaker. The on-side speaker is also enabled and cannot be deselected.
Each Audio Panel is connected to a separate flight deck speaker for listening to all of the radios. Each SPKR
Key controls the on-side speaker unless oxygen masks are in use. During oxygen mask use the on-side speaker
is always enabled.
Pressing the SPKR Key selects and deselects the speaker. Except for oxygen mask use, speaker audio is
muted when the PTT Key is pressed.
Figure 4-41 Speaker Key
UNMUTED INPUTS
Aural alerts are always present on the headset and are on the speaker when the SPKR is selected. These
warnings and the aircraft radios are not heard on the passenger headphones.