| 摘要 |
PURPOSE: To prevent a signal to be transmitted at the frequency of the hopping destination from being made erroneous by the collision of channels or the like by changing a carrier wave frequency to be next hopped into the other frequency when the noise level of carrier wave frequency to be next hopped exceeds a prescribed value. CONSTITUTION: This transmitter/receiver is provided with a control circuit for changing the carrier wave frequency of a transmissive signal according to a hopping pattern. Namely, a channel check part 40 is provided as a reception system for detecting the noise level of a carrier wave frequency fi to be next hopped according to the hopping pattern and when that noise level exceeds the prescribed value, a control part 10 changes the carrier wave frequency to be next hopped into a frequency fk. When the carrier wave frequency to be next hopped is changed from the frequency fi into the frequency fk, the transmissive signal is transmitted while inserting information related to that frequency fk at any prescribed position. |
