2-10
Garmin GTN 725/750 Pilot’s Guide
190-01007-03 Rev. B
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Music
Utilities
System
Messages
Symbols
Appendix
Index
2.2.4
Cabin Speaker Selection and Volume
The
Cabin
Speaker
key turns the cabin speaker on and off. The
Speaker
Volume
key sets the volume level.
1. Touch the
Cabin Speaker
key to toggle the cabin speaker
on and off.
2. Touch the
Speaker Volume
key to set the Cabin Speaker
volume. Touch the
Speaker Volume
arrows to set the
volume.
Touch To
Increase Volume
Touch To
Decrease Volume
Percent Of Maximum Volume
Graphic Scale Showing Volume
Figure 2-13 Cabin Speaker Volume Selection
2.2.5
Marker Audio and Volume
The optional Marker Beacon Receiver uses an audio indicator to alert you
when the aircraft passes over a Marker Beacon transmitter. The audio from the
Marker Beacon Receiver can be heard unless disabled by selecting Marker Audio.
When Marker is selected (green bar shown), the tones for Marker Beacons are
heard. When Marker is not selected (green bar not shown), the tones for Marker
Beacons are not heard.
The GMA 35 marker beacon receiver and indicators are part of the ILS system.
The marker beacon lamps operate independently of any audio selection and
cannot be turned off. The GMA 35 can drive external marker lamps if required
and also provides an autopilot middle marker sense output.
Prior to beginning an ILS approach, select high or low marker sensitivity with
the
Marker Hi Sense
key. The lighted green bar in the key illuminates for high
sensitivity and remains off for low sensitivity.
Touching the
Marker Audio
key prior to an approach allows the marker
audio tones to be heard in the headsets. When the green bar in the
Marker
Audio
key shows, the marker audio will be heard when available. The
Audio
Panel
key will change to a
Mute
key. Touching the Mute key while audio is
heard will mute the marker audio until the next beacon is received. The marker
beacon signal sensitivity threshold can be set in Configuration mode. Contact a
Garmin-authorized service center for adjustment.
Summary of Contents for GTN 750
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