| 摘要 |
PURPOSE:To offer the switching index of the band width by detecting and then displaying the disturbing wave approximate to the reception desired signal, thus facilitating the easy switching decision. CONSTITUTION:The band switch signal is sent to intermediate frequency amplifier circuit 4 via the automatic sweep of band sequential switching means 8. The degree of effect due to the disturbing signal is detected for each band through disturbance detection circuit 6 and then delivered to display circuit 9. Circuit 9 supplies for display the detection signal sent from circuit 6 in correspondence to the timing of the band switch signal. Based on the display contents of circuit 9, the user decides the optimum band and then can select the desired band via manual switching command means 7. |
