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190-01255-00 Rev. B
Garmin G1000H
™
Pilot’s Guide for the Bell 407GX
137
AUDIO PANEL AND CNS
4.6 AUDIO PANEL PREFLIGHT PROCEDURE
NOTE: If the pilot and/or copilot are using headsets that have a high/low switch or volume control knob,
verify that the switch is in the high position and the volume control on the headsets are at maximum volume
setting. On single-pilot flights, verify that all other headsets are not connected to avoid excess noise in the
audio system.
NOTE: When the MAN SQ Key is pressed, the ICS squelch can be set manually by the pilot and copilot.
If manual squelch is set to full open, background noise is heard in the ICS system as well as during COM
transmissions.
Afterpowering upthesystem, thefollowingsteps aidinmaximizing theuseof theAudio Panelaswell as
prevent pilot and copilot induced issues. These preflight procedures should be performed each time a pilot
boards the aircraft to insure awareness of all audio levels in the Audio Panel and radios.
Figure 4-46 Audio Panel Controls
Manual Squelch Annunciator;
Off for Automatic Squelch, On
for Manual Squelch
Volume or Manual
Squelch
Relative Volume/
Squelch Scale
Cursor
Intercom Annunciators
Setting the Audio Panel during preflight:
1) Verify that the PILOT , COPLT and PASS annunciators are lit.
2) Adjust radio volume levels (COM, NAV) to a suitable level.
3) Use the VOL/CRSR Knobs to adjust the intercom volumes to the desired level.
Once this procedure has been completed, the pilot and copilot can change settings, keeping in mind the notes
above.