| 摘要 |
PURPOSE:To improve an operational efficiency by displaying frequency data for a fixed time when a channel display switch is depressed in a transmitter-receiver which has a storage device of frequency data and a display equipment for transmission and receiving frequency display. CONSTITUTION:Six memory channels 1-6 are provided to store six transmission and receiving frequencies. On a basis of the output from control unit 14, transmission and receiving frequencies are displayed by a driving circuit which drives the LED of display equipment 15. Signals are inputted to control unit 14 by depressing a channel up switch of keyboard switches of manual switch 13, and a channel display output is outputted according to the control program in a ROM area and is displayed on LED 15. In respect to the display time, an initial value is set to the RAM area of control unit, and the RAM value is changed by an operation circuit, and a time when the RAM value becomes a fixed value is defined as the display time, thus obtaining several ten ms. as the display time. |
