| 摘要 |
PURPOSE:To prevent a radio interference, and to simplify operation by constituting a titled system so that a receiver searches a dead channel and sets a receiving channel to its dead channel, and also sets a transmission channel of a wireless microphone to its dead channel, when the wireless microphone is set to a prescribed position of the receiver. CONSTITUTION:When a wireless microphone 100 is set to a recessed part 202 of a receiver 200, a connector 144 and 244 are connected, also a switch 243 is driven and becomes on from off, a value N is supplied to a frequency dividing circuit 222 from a microcomputer 230, and also receiving channel of the receiver 200 is varied by one channel each. In such a case, ''0'' and ''1'' of a detecting output Sd is checked by the microcomputer 230, by which a deach channel is searched. In such a state, if Sd=1 at the time of some receiving channel, it is a dead channel, therefore, the value N of the frequency dividing circuit 222 is fixed to a value Ni of this time. |
