14-14] 



DESIGN FEATURES 



771 



Indicators. Considerations of space and simplicity of design fairly 

 well limit the display system to a PPI type indicator, most often utilizing a 

 5-inch-diameter display tube. It is often found desirable to have dual 

 indicators in a cockpit; these may be completely parallel systems or may 

 have independently selectable ranges. A variety of ranges and accurate 

 range marks are a necessity in any weather radar. Perhaps the most severe 

 problem encountered in the use of the PPI is brought about by the high 

 ambient light conditions so often found in the cockpit. As a result of this, 

 airborne radar has done much to stimulate the development of the storage, 

 type indicator tube with its tremendous increase in light output. 



C-BAND-5.7 CM 



NOMINAL RANGE'. 150 N. ML 



WEIGHT: 113 LBS 



NOMINAL POWER OUTPUT: 80 KW PEAK 



POWER CONSUMPTION: APPROX 800 W 



ANTENNA BEAMWIDTH; 5.5 DEC 



^f^ 



X-BAND-3.2 CM 



NOMINAL RANGE: 150 N. Ml. 



WEIGHT: 89 LBS 



NOMINAL POWER OUTPUT: 18 KW PEAK 



POWER consumption: 500 W 



ANTENNA BEAMWIDTH: 4 DEC 



^ 



Fig. 14-16 Typical C-Band and X-Band Commercial Air Weather Radar Systems. 

 (Courtesy, Bendix Radio Division of Bendix Aviation Corporation) 



