| 摘要 |
PROBLEM TO BE SOLVED: To provide a reception state display suitable for the adjustment of the received polarized face of a reception antenna receiving radio waves of two orthogonal polarized waves from a plurality of artificial satellites. SOLUTION: A selection circuit 13 converts the signal of a designated channel among RF signals inputted from a converter 30 through a transmission line 9 into an IF signal. A demodulation circuit 14 demodulates the above IF signal and the voltage level of the demodulated signal is taken in by a control circuit 22 through an A/D converter 15, and is displayed on a display 17 as a reception state of the RF signal. A voltage generation means 19 feeding power to the converter 30 and switching the feeding voltage for outputting the RF signal of the designated polarized wave from the converter 30, and a tone signal generation circuit 20 generating a tone signal for outputting the RF signal of the designated satellite from the converter 30 are installed. Thus, the reception state can be displayed on an arbitrary polarized wave from an arbitrary satellite. |
