Garmin GTN 750 Pilot's Guide - Page 50

Foreword Getting Started Audio & Xpdr Ctrl 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. Com/Nav FPL 2. Touch the Speaker Volume key to set the Cabin Speaker volume. Touch the Speaker Volume arrows to set the volume. Direct-To Percent Of Maximum Volume Graphic Scale Showing Volume Proc Touch To Decrease Volume Touch To Increase Volume Charts Figure 2-13 Cabin Speaker Volume Selection Wpt Info 2.2.5 Marker Audio and Volume Map 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 Traffic 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 Terrain heard. When Marker is not selected (green bar not shown), the tones for Marker Beacons are not heard. Weather 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 Nearest cannot be turned off. The GMA 35 can drive external marker lamps if required Music and also provides an autopilot middle marker sense output. Prior to beginning an ILS approach, select high or low marker sensitivity with Utilities the Marker Hi Sense key. The lighted green bar in the key illuminates for high sensitivity and remains off for low sensitivity. System 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 Messages 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 Symbols 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 Appendix Garmin-authorized service center for adjustment. Index 2-10 Garmin GTN 725/750 Pilot's Guide 190-01007-03 Rev. B