Direction signal distoridon measurement circuit - is for two-channel directional receiver using phase discrimination technique

摘要

The device is for determination of distortion of the direction signal in a two channel direction finding instrument and is designed to operate economically and quickly. It produces an output signal directly proportional to the distortion arising when two signals of different incident direction and phase lag are recieved. The two channel receiver outputs two voltage signals (Ux, Uy) to the distortion measurement circuit. One of the signals (Uy) is delayed by 90 degrees w.r.t. the other (Ux) in the delay element (1'). Each delayed voltage is added to the product of the other delayed voltage and a third voltage (T) to produce two summed voltages from two addition elements (3, 3'). The added voltages are input to a phase discriminator (4) which outputs the third voltage (T). The third voltage (T) is proportional to the distortion.