Cockpit Reference Guide

190-00763-02 Rev. A
Garmin G1000 Pilot’s Guide for the Piper PA-46 Meridian
101
AUDIO PANEL AND CNS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
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 Panels, communication radios,
navigation radios, and Mode S transponders. The System Overview Section provides a block diagram description
of the Audio Panels and CNS system interconnection.
CNS operation in the Piper PA-46-500TP Meridian is performed by the following Line Replaceable Units
(LRUs):
•PrimaryFlightDisplay(PFD)(2)
•MultifunctionDisplay(MFD)
•IntegratedAvionicsUnit(2)
•AudioPanel(2)
•ModeSTransponder(2Optional)
•MFD/PFDControlUnit
ThePFDcontrolsareusedtotunethecommunicationtransceiversandnavigationradios.
The two Audio Panels provide the traditional audio selector functions of microphone and receiver audio
selection.  The AudioPanelsinclude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(s) are 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areplystatus(Figure4-1).