Pilot's Guide

190-009663-02 Rev. B Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT/GTi 129
AUDIO PANEL AND CNS
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ight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.
Press the SPKRKeytoselectanddeselect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.