user manual

190-00498-07 Rev. A
Garmin G1000 Pilot’s Guide for Cessna Nav III
95
AUDIO PANEL AND CNS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
SECTION 4 AUDIO PANEL AND CNS
4.1 OVERVIEW
The Communication/Navigation/Surveillance (CNS) system includes the Audio Panel, communication radios,
navigation radios, and Mode S transponder. The System Overview Section provides a block diagram description
of the Audio Panel and CNS system interconnection.
CNS operation in Cessna Nav III aircraft is performed by the following Line Replaceable Units (LRUs):
•PrimaryFlightDisplay(PFD)
•MultiFunctionDisplay(MFD)
•IntegratedAvionicsUnit(2)
•AudioPanel
•ModeSTransponder
TheMFD/PFDcontrolsareusedtotunethecommunicationtransceiversandnavigationradios.
The Audio Panel provides the traditional audio selector functions of microphone and receiver audio selection.
The Audio Panel includes an intercom system (ICS) between the pilot, copilot, and passengers, a marker beacon
receiver, and a COM clearance recorder. Ambient noise from the aircraft radios is reduced by a feature called
Master Avionics Squelch (MASQ). When no audio is detected, MASQ processing further reduces the amount of
background noise from the radios.
The Mode S transponder is controlled with softkeys and the FMSKnoblocatedonthePrimaryFlightDisplay
(PFD).TheTransponderDataBoxislocatedtotheleftoftheSystemTimeBox.Thedataboxdisplaystheactive
four-digitcode,mode,andreplystatus(Figure4-1).