Abstract: There is disclosed a control system for receiving multichannel frequency multiplex satellite communication signals with channel identification coding wherein a desired channel can be located and locked-on by its identification code without knowing the channel frequency, including a receiver for satellite signals feeding at least one and preferably three or more voltage tunable demodulators. Each tunable demodualtor has an audio output for voice or data to be utilized locally or retransmitted, and an AFC output monitored by the control system; a respective demodulator is normally tuned to keep the AFC output at approximately 90 percent of its maximum value thereby tracking a received carrier signal. A microprocessor is programmed to detect subaudible frequency or other coding in the audio signal and to produce a tuning voltage bump signal on detection of undesired-channel coding; it also generates a reset signal after tuning voltage has reached maximum value to return tuning voltage to minimum value.