480 



BELL SYSTEM TECHNICAL JOURNAL 



TS-102A/AP (Fig. 27) and its predecessors TS-102 and TS-19 are pre- 

 cision calibrators which have been extensively used for checking a large 



^AAA- 



-Aftf^ 



X. 



SYNC PULSE 

 OUTPUT 



MARKER PULSE 

 OUTPUT 



Fig. 27— Block diagram of TS-102/AP and TS-102A/AP range calibrators. 



Fig. 28— Two test sets for checking the cominiters used in i)ombsight and fire control 

 radars. 



number of different airborne bombing and gunlaying radars and shipborne 

 lire control and searcli radars. These sets deliver accurately spaced marker 



