EVALUATION OF THE AN/BRD-4 DIRECTION FINDER

Abstract : Evaluation of the AN/BRD-4 direction finder was carried out by measurements of receiver sensitivity, selectivity, dynamic range, D/F system bearing sensitivity, bearing error performance, sense performance, and by tests of D/F indicator performance in the integration mode. These data are presented in detail. The above performance tests revealed system characteristics requiring corrections and modifications to the D/F receiver and D/F indicator. These areas include the receiver tuning cam, power supplies, 400 cps AC power and D/F indicator integration circuitry. (Author)