Which device transmits the angular position of the antenna to the radar indicator?

• A. Synchro transmitter
• B. Oscillator
• C. Detector
• D. Mixer

Answer: (A)

In radar systems, the angular position of the antenna is sent to the radar indicator using a synchro system. A synchro transmitter mounted on the antenna shaft encodes the antenna’s angle into a three-phase AC signal. The radar indicator has a synchro receiver that decodes that signal and deflects the display to match the antenna’s azimuth. The other devices serve different roles: an oscillator is for generating local RF signals, a detector extracts target echoes, and a mixer combines signals in the receiver. So the component that transmits the angular position is the synchro transmitter.