| 摘要 |
PURPOSE:To facilitate the tuning operation for a tuning indicating device of a bar graph type which represents plural tuning points by lighting up a dot, by blinking the dot every time the tuning point varies in the tuning mode. CONSTITUTION:A channel selection display 18 informs the selection of channel by lighting up a dot with each 1MHz in the receiving mode of the FM broadcast. A dot of 76MHz glows in case a station of 76MHz is received. When a channel is selected, a PLL circuit varies the receiving frequency with a 100KHz step. The signal showing the unlocked state is delivered from a PLL circuit with each change of the receiving frequency. The dot is turned off with each output of said signal. The details can be known for the channel selection by counting the blinking numbers of the dot. Thus the receiving stations having the unit under MHz can be known. |
