190-01134-12 Rev. K
Garmin GMA 350/350c Pilot’s Guide
16
GMA 350/350c Audio Panel
MARKER BEACON RECEIVER
The marker beacon receiver detects any marker beacon signal within
the reception range of the aircraft.
When a marker beacon signal is detected, the lamps illuminate, and
an associated keyed-tone is heard when MKR audio is selected. Marker
beacon lamps operate independently of any audio selection and cannot
be turned off.
Marker Beacon Key & Lamps
The marker beacon signal sensitivity threshold can be set to High, Low,
or User Selectable (toggle switch required).
The receiver detects the three marker tones (outer, middle, and inner).
Audio
Frequency
Audio Keying
Lamp Actuated
400 Hz
(Outer)
− − − − −
Blue
1300 Hz
(Middle)
−
−
−
−
−
Amber
3000 Hz
(Inner)
White
The GMA 350/350c provides three states of marker beacon operation;
On, Muted, and Deselected. The
MKR/MUTE
key annunciator indicates
when marker beacon audio is selected. Marker beacon audio is not
heard when the annunciator is off or when the annunciator is on with the
marker beacon audio muted.
Summary of Contents for GMA 350c
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