INTERMEDIATE FREQUENCY CONTROL SYSTEM OF TELEVISION MONITOR

摘要

The intermediate frequency of a television set is adjusted in an assembly line automatically by using a computer and a step motor. The apparatus includes a computer(1) for controlling the whole system, a D/A converter(3) for converting and transmitting test signal generated by the computer to a target board through a sweep signal generator(4), a frequency marker board(8) for sending special signal generated by a sweep signal generator(4), an A/D converter(7) for converting and sending analog output signal generated by the target board to the computer(1), and a motor driver(9) for adjusting IF frequency by driving the step motor according to command signal generated by the computer(1).