190-00498-07 Rev. A
Garmin G1000 Pilot’s Guide for Cessna Nav III
117
AUDIO PANEL AND CNS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
MARKER BEACON RECEIVER
NOTE: The marker beacon indicators operate independently of marker beacon audio and cannot be turned
off.
The marker beacon receiver is used as part of the ILS. The marker beacon receiver is always on and detects
any marker beacon signals within the reception range of the aircraft.
The receiver detects the three marker tones – outer, middle, and inner – and provides the marker beacon
annunciationslocatedtotheleftoftheAltimeteronthePFD.
Figure 4-27 Marker Beacon Annunciations on the PFD
Outer Marker
Indication
Middle Marker
Indication
Inner Marker
Indication
Figure 4-28 Marker Beacon Keys
TheAudioPanelprovidesthreedifferent statesof markerbeaconoperation;On,Muted,andDeselected.
Pressing the
MKR/MUTE
Key selects and deselects marker beacon audio. The key annunciator indicates when
marker beacon audio is selected.
Duringmarkerbeaconaudioreception,pressingthe
MKR/MUTE
Key mutes the audio but does not affect the
markerannunciations(Figure4-27).Themarkertoneissilenced,thenwaitsforthenextmarkertone.The
MKR/MUTE
KeyAnnunciatorisilluminated,indicatingaudiomuting.Theaudioreturnswhenthenextmarker
beacon signal is received. If the
MKR/MUTE
Key is pressed during signal reception (O, M, I indication) while
marker beacon audio is muted, the audio is deselected and the
MKR/MUTE
KeyAnnunciatorisextinguished.
Pressing the HI SENS Key switches between high and low marker beacon receiver sensitivity. The HISENS
function (annunciator illuminated) is used to provide an earlier indication when nearing a marker during an
approach. The LOSENSfunction(annunciatorextinguished)resultsinanarrowermarkerdwellwhileovera
station.