
ii GTN 650/750 Series SW V3.00 Upgrade Supplement 190- 01007-05 Rev A
4.4.3 TCAD9900BTrafcMenu....................................................... 23
4.4.3.1 TrafcAudio........................................................................... 23
4.4.3.2 ShieldSetup........................................................................... 24
4.4.3.3 ApproachMode ..................................................................... 25
4.5 TCAD9900BXOperation ...................................................................... 26
4.5.1 SelectLocalBarometricPressure............................................. 26
4.5.2 SelectAltitudeFilter................................................................ 27
4.5.3 TCAD9900BXTrafcMenu .................................................... 27
4.5.3.1 TrafcAudio........................................................................... 28
4.5.3.2 ShieldSetup........................................................................... 28
4.5.3.3 ApproachMode ..................................................................... 29
4.5.3.4 GroundMode......................................................................... 29
5 Weather ................................................................................................30
5.1 GarminGWXRadarDescription(GTN7XXOnly) ................................... 30
5.1.1 PrinciplesofPulsedAirborneWeatherRadar ........................... 30
5.1.2 AntennaBeamIllumination .................................................... 31
5.1.3 RadarSignalAttenuation........................................................ 32
5.1.4 RadarSignalReectivity ......................................................... 33
5.1.4.1 Precipitation........................................................................... 33
5.1.4.2 GroundReturns...................................................................... 34
5.1.4.3 AngleofIncidence.................................................................. 34
5.2 RadarOperatingDistance
(GTN 7XX Only).............................................................. 35
5.2.1 MaximumPermissibleExposureLevel(MPEL)(GWX68).......... 35
5.2.2 MaximumPermissibleExposureLevel(MPEL)(OtherRadars)... 35
5.3 BasicRadarAntennaTiltSetup(GTN7XXOnly)..................................... 36
5.4 RadarWeatherMappingandInterpretation
(GTN 7XX Only)............................. 37
5.4.1 WeatherdisplayInterpretation................................................ 37
5.4.2 Thunderstorms ....................................................................... 38
5.4.3 Tornadoes .............................................................................. 40
5.4.4 Hail........................................................................................ 40
5.5 GWXRadarOperationinWeatherMode
(GTN 7XX Only)................................... 41
5.5.1 ViewingWeatherontheWeatherRadarPage ......................... 42
5.5.2 ConguringWeatherRadarPage ............................................ 43
5.5.3 VerticallyScanningaStormCell.............................................. 44
5.5.4 AdjustingtheAntennaTiltAngle............................................. 45
5.5.5 AdjustingtheBearingLine...................................................... 46
5.5.6 AdjustingGain ....................................................................... 47
5.5.7 SectorScan ............................................................................ 48