Satellite receiving dual HF T. V. picture-in-picture remote-control and digital tuning system

The remote control and digital tuning system for satellite receive, dual-high-frequency TV and picture-in-picture (PIP) comprises single-chip processor as main controller for frequency synthesis, voltage synthesis, digital tuning and PIP, control signal recognizer, initial controller of main controller, overall power supply hold controller, power supply reset controller, storage controller, transform of frequency syntheis digital tuning F.S1/F.S2, tuning controller for BS receiving sound subcarrier, and AV signal switching circuit. Only one single-chip microprocess control system and a remote controller is necessary.