| 摘要 |
PURPOSE:To inform operation such as operation of an operation key and operation of automatic reception while utilizing a modulation MSK signal by utilizing a time where the function of a transmitter in a communication equipment is stopped. CONSTITUTION:An MODEM7 demodulates digital information subjected to MSK modulation and also applies MSK modulation of the digital information at transmission. A controller 8 controls a radio equipment based on the digital information and corresponding operation and also generates the digital information corresponding to an operated operation section 12. Moreover, the controller 8 confirms the operation at the transmission pause period when the reception and transmission are changed. That is, an informing tone digital signal is transmitted from the controller 8 to the MODEM7 at the pause period and the MODEM7 outputs an MSK wave output corresponding to the informing tone digital signal. Then the MSK wave output is outputted from a speaker 5 as an informing tone. |
