3-13190-01004-03 Rev. F Garmin GTN 625/635/650 Pilot’s GuideForewordGettingStartedXpdr CtrlCom/NavFPLDirect-ToProcWpt InfoMapTrafflcTerrainWeatherNearestServices/MusicUtilitiesSystemMessagesSymbolsAppendixIndex3.5 Nav (VOR/Localizer/Glideslope) ReceiverOperationsThe GTN 650 includes digitally-tuned Nav/localizer and glideslope receiverswith the desired frequency selected on the Nav window, along the top right-handside of the display. Frequency selection is performed by pressing the small rightknob to activate Nav Standby frequency editing and then turning the small andlarge right knobs or keypad to select the desired frequency.Nav Control Text Active NavFrequency Standby NavFrequencyFigure 3-22 Nav Frequency Window3.5.1 Ident Audio and VolumeNav ident is enabled by pressing the Volume knob when the Nav windowis active. When Nav ident is enabled, the ID annunciation will appear in theactive Nav window. When the Nav function is enabled, the Nav Standby channelwindow will highlight briefly and then turn to blue text. The Nav Standbyfrequency will be active for editing for about 30 seconds before the Com Standbyfrequency becomes active for editing.Nav Standby Channel Highlighted ToIndicate It Is Active for Frequency SelectionNav Ident Is ActiveFigure 3-23 Nav Standby Frequency Window is ActiveNav audio volume is adjusted using the Volume knob. Turn the Volumeknob clockwise to increase volume, or counterclockwise to decrease volume.