| 摘要 |
PURPOSE:To realize the control of selector with a simple circuit by performing the selection of the hot standby relay unit with the intermediate frequency section easy to operate with a simple circuit constitution and making unnecessary the high frequency selector for high output for the selection of the transmitter. CONSTITUTION:Two receivers supply the output of the local oscillators 4, 10 via the reception branch filters 2, 9 from the antennas 1, 8, and the output reaches the intermediate frequency selector 7 via the reception frequency converters 3, 12. The input signal of the selector 7 compared 6 and the signal of high level of either one is branched with the next branch circuit 13. This branched output is amplified 20, 21 after being converted 15, 18 into transmission wave via the intermediate frequency selectors 14 and 17. Either one of the outputs of the amplifiers 20 and 21 is delivered from the transmission antennas 26 and 17 via the transmission branch filters 24 and 25. |
