| 摘要 |
PURPOSE:To complete automatic preset in a short time by applying the comparison and rewrite operation so that a preset memory is occupied only by a high- order station having a high electric field. CONSTITUTION:A PLL2 is connected to a radio tuner 1 and a microcomputer system 3 is connected to the PLL2. The microcomputer system 3 consists of a microprocessor 30, parallel I/O31, 32 a ROM33, a RAM34 and an A/D converter 35 and the RAM34 is used as the preset memory. The RAM34 is rewritten so that the high-order station having high electric strength is preset based on an output from the A/D converter 35. |
