Garmin GTN 650 Series Pilot's Manual Upgrade Supplement page 4

4.4.3 TCAD 9900B Traffic Menu....................................................... 23
4.4.3.1 Traffic Audio ........................................................................... 23
4.4.3.2 Shield Setup ........................................................................... 24
4.4.3.3 Approach Mode ..................................................................... 25
4.5 TCAD 9900BX Operation ...................................................................... 26
4.5.1 Select Local Barometric Pressure ............................................. 26
4.5.2 Select Altitude Filter ................................................................ 27
4.5.3 TCAD 9900BX Traffic Menu .................................................... 27
4.5.3.1 Traffic Audio ........................................................................... 28
4.5.3.2 Shield Setup ........................................................................... 28
4.5.3.3 Approach Mode ..................................................................... 29
4.5.3.4 Ground Mode ......................................................................... 29
5 Weather ................................................................................................30
5.1 Garmin GWX Radar Description (GTN 7XX Only) ................................... 30
5.1.1 Principles of Pulsed Airborne Weather Radar ........................... 30
5.1.2 Antenna Beam Illumination .................................................... 31
5.1.3 Radar Signal Attenuation ........................................................ 32
5.1.4 Radar Signal Reflectivity ......................................................... 33
5.1.4.1 Precipitation ........................................................................... 33
5.1.4.2 Ground Returns ...................................................................... 34
5.1.4.3 Angle of Incidence .................................................................. 34
5.2 Radar Operating Distance (GTN 7XX Only) .............................................................. 35
5.2.1 Maximum Permissible Exposure Level (MPEL) (GWX 68) .......... 35
5.2.2 Maximum Permissible Exposure Level (MPEL) (Other Radars) ... 35
5.3 Basic Radar Antenna Tilt Setup (GTN 7XX Only) ..................................... 36
5.4 Radar Weather Mapping and Interpretation (GTN 7XX Only) ............................. 37
5.4.1 Weather display Interpretation ................................................ 37
5.4.2 Thunderstorms ....................................................................... 38
5.4.3 Tornadoes .............................................................................. 40
5.4.4 Hail ........................................................................................ 40
5.5 GWX Radar Operation in Weather Mode (GTN 7XX Only)................................... 41
5.5.1 Viewing Weather on the Weather Radar Page ......................... 42
5.5.2 Configuring Weather Radar Page ............................................ 43
5.5.3 Vertically Scanning a Storm Cell .............................................. 44
5.5.4 Adjusting the Antenna Tilt Angle ............................................. 45
5.5.5 Adjusting the Bearing Line ...................................................... 46
5.5.6 Adjusting Gain ....................................................................... 47
5.5.7 Sector Scan ............................................................................ 48
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GTN 650/750 Series SW V3.00 Upgrade Supplement 190- 01007-05 Rev A