| 摘要 |
PURPOSE:To improve operating efficiency of a device, by starting a timer function when level information receiving communication channel information is coincident with information at a receiving state with a press switch and displaying it on a display device after the elapse of a prescribed time. CONSTITUTION:A radio wave from an antenna 1 enters a receiver 2 and the received electric field strength is discriminated at a receiving level discriminator 3, in a state display system of the radio device performing the end of call notice at a multi-channel access system terminal station of a 2-frequency semi- duplex system. An output of the receiving level discriminator 3, a press switch 4, and a channel information terminal 5 enters an AND circuit 6, and a signal having ''H'' is outputted to a counter 7 exclusively when said three outputs are all at ''H'', and an ''L'' is given in other states. The counter 7 measures the time when the said input is at ''H'' and resets the measuring time so far when at ''L''. When the measuring time reaches a predetermined time, the output of the counter 7 is displayed on a display 9 via a display signal generating section 8. |
