| 摘要 |
PROBLEM TO BE SOLVED: To simplify the inspection of a reception device by permitting a notify ing means to notify information related to the number of channels received by means of a reception means and judging a reception situation in the reception means of the receiver. SOLUTION: When an instruction for making a system to an inspection mode is given, a counter value prepared in a central control unit CPU 12 is initialized to be zero and the reception channel registere of CPU 12 is set to a channel number '1'. Channel setting control data is supplied from CPU 12 to a voltage control oscillator 6 so that the channel which is set is received, and the reception of the channel concerned is executed. Here, a reception state in the received channel is judged. Whether the SN ratio of a reception signal is more than 12dB or not is judged based on the amplitude of the reception signal, which is detected in an amplitude detection circuit 17, for example. When the SN ratio is equal to or more than 12dB, the count value of a counter in CPU 12 is added by one. The channel number of the reception channel register is added by one after the addition of the count value, and reception performance can easily be inspected. |
