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Audio Panel Controls
10
Rev. 0
Feb/06
N
When the LED above the MKR button is OFF, the marker audio is
muted. The visual indications on the PFD will still operate when the air-
craft passes over the marker.
MKR SENS (MARKER BEACON SENSITIVITY) BUTTON
The MKR SENS button controls the marker beacon
receiver sensitivity. The button alternates between
the HI and LO settings. The LEDs indicate which sen-
sitivity is selected, as follows:
• HI - High sensitivity allows the pilots hear the outer marker
approximately one mile from the beacon.
• LO - Low sensitivity provides a more accurate location of the
marker. When used only for approach markers, many pilots
choose to leave the switch in the low sensitivity position.
MKR MUTE/TEST (MARKER BEACON MUTE/TEST)
BUTTON
When the MKR MUTE/TEST button is pressed and
released, the marker beacon audio is muted for that
marker beacon. The muting continues until one of the
following events occurs:
• A marker tone is detected that is different from the one that was
present when the MUTE button was pressed.
• The audio panel is turned OFF.
• If MUTE is pressed prior to crossing the marker beacon, the mute
will be held for 60 seconds and then timeout.
When the MKR MUTE/TEST button is pressed and held for five sec-
onds, the marker beacon discretes go high for one second.
KMA 29 Audio Panel Pilot’s Guide