| 摘要 |
PURPOSE:To improve the operability by starting sweep from an optional preset channel and writing a channel selection data of a broadcast channel into a memory sequentially so as to attain automatic write of a channel required for the user. CONSTITUTION:A horizontal synchronizing signal from a synchronizing separation circuit 19 and a horizontal oscillation output from a horizontal oscillation and horizontal AFC circuit 21 are added at an AND gate 23, the result is subjected to waveform-shaping at a waveform shaping section 25 via an integration circuit 24 and inputted to a CPU27. The CPU27 stores a channel selection data to a memory 28, the data is read and channel selection is executed, and sweep is started from an optional preset channel at the start of automatic search preset so as to catch a channel having broadcast and a channel selection data is written sequentially in the memory 28. |
