91190-00607-02 Rev CDetailed OperationRadaris required by the transmitter within the radar headassembly. Pressing the STBY/ON key while in Standbymode turns on the radar in the Weather Mode. Whilein the ON mode in both Map and Weather modes, thegreen RDR annunciator is on solid indicating that theradar is energized and transmitting.Test ModePressing the TEST key while in the Standby modeplaces the radar in the Test mode. The radar thensends a test pattern that is displayed on the GMX 200.Weather ModeIn the weather (WX) mode, the antenna is trans-mitting and painting reflected returns on the screen.This mode is intended for painting airborne weatherand is the normal operating mode for the unit. Radarreturns are painted in the following colors:• Black• Green• Yellow• Red• MagentaBlack is the weakest return while Magenta showswhere the strongest returns were obtained. While inthe weather mode (GWX 68 only), the gain can beadjusted with the Gain - and Gain + keys.MAP ModeThe Map (MAP) mode is used for obtaining returnsfrom the ground. Map mode is available for the GWX68, ART2000/2100, RS 811A, and RS 181A. In thismode, the return data is rendered in the followingcolors:GWX 68 ART2000/ART2100/RS 181A/RS 811A• Black • Black• Cyan • Cyan• Yellow • Green• Magenta • Yellow• Blue • Red• MagentaWhile in the Map mode, the gain can be adjustedwith the Gain - and Gain + keys.Manual Gain(GWX 68 only)Activating the Gain - and Gain + keys will resultin changing the blue Manual Gain bar displayed abovethe key labels. Adjusting the level to the reference lineat the right of the bar scale will return the radar toAutomatic Gain.
