Garmin G1000 King Air C90GT - Manual (Page 134)

190-00663-01 Rev. A Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT 120
AUDIO PANEL AND CNS
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
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 an 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
annunciations located to the left of the Altimeter on the PFD.
Figure 4-27 Marker Beacon Annunciations on the PFD
Outer Marker
Indication
Middle Marker
Indication
Inner Marker
Indication
Figure 4-28 Marker Beacon Keys
The Audio Panels provide three different states of marker beacon operation; On, Muted, and Deselected.
Pressing the MKR/MUTE Key selects and deselects marker beacon audio. The key annunciator indicates when
marker beacon audio is selected.
During marker beacon audio reception, pressing the MKR/MUTE Key mutes the audio but does not affect the
marker annunciations (Figure 4-31). The marker tone is silenced, then waits for the next marker tone. The
MKR/MUTE Key Annunciator is illuminated, indicating audio muting. The audio returns when the next marker
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 Key Annunciator is extinguished.
Pressing the HI SENS Key switches between high and low marker beacon receiver sensitivity. The HI SENS
function (annunciator illuminated) is used to provide an earlier indication when nearing a marker during an
approach. The LO SENS function (annunciator extinguished) results in a narrower marker dwell while over a
station.