Automatic tracking of satellite from antenna of ground station - amplifying noise in two channels and using logic circuits to detect its disappearance

摘要

The circuit monitors a signal which disappears when the setting is correct. Channels transmitting the error signal are coupled for a.c. with an analogue noise amplifier. They apply to a digital part the amplifier background noise present even during correct setting. Logic circuits in the digital part detect the disappearance of the noise, and retransmit monitoring and/or switching signals.