| 摘要 |
PURPOSE:To listen assuredly the desired program information by transmitting the different program type codes for each program and detecting these codes through a receiver to secure the coincidence with a code set previously. CONSTITUTION:The output of an FM tuner part 2 is selected by a changeover switch SW4A and amplified 5 to be reproduced through a speaker 6. In this case, the output of an AM tuner part 3 is applied to a program discriminating signal detecting circuit 7 via a changeover switch SW4B. Then a specific program start discrimination code is detected and sent to a coincidence detecting circuit 8. This code is compared with a program start code pattern 9 set by a program setting switch SW11. When the coincidence is obtained through this comparison, a start coincidence signal is produced from the circuit 8. The SW4A is switched via an FF16, an OR circuit 12 and an FF13, and an information program given from the part 3 is reproduced through a speaker 6. A program end identificatioin code is delivered from the circuit 7 at the end of a program, and the coincidence is secured by the circuit 8 between said discrimination code of the circuit 7 and a program end code pattern 10. Thus, the SW4A is switched toward the part 2, and a listener can listen to the rest of the first program. |
