| 摘要 |
PROBLEM TO BE SOLVED: To prevent the damage of internal equipment or the like by surely preventing the overinput of RF equipment by generating an overinput discriminate signal and performing the OFF control of the RF equipment in response to this signal when the signal level of an RF signal reaches a prescribed value. SOLUTION: A level detector 12 detects the signal level of the RF signal inputted from a signal output part 11 to RF equipment 10 and outputs a detecting signal to a comparator 13. A reference signal set based on the allowable input level of RF equipment 13 is inputted to the other input terminal of the comparator 13, and a control part 14 is connected to its output terminal. Besides, when it is discriminated that the signal level of the detecting signal has exceeded the signal level of the reference signal, the comparator 13 generates an overinput discriminating signal and outputs it to the control part 14. When the overinput discriminating signal is inputted from the comparator 13, while connecting its output terminal to the signal input terminal of the RF equipment 10, the control part 14 generates an equipment stop signal, outputs it to the RF equipment 10 and performs the OFF control of this RF equipment 10. |
