| 摘要 |
PURPOSE:To test a transmitter and a receiver at a time by selecting properly a difference between a 1st offset frequency and a 2nd offset frequency and selecting optionally the difference between a transmission frequency and a reception frequency. CONSTITUTION:A difference is given to a frequency for a transmitter Tx and a receiver Rx by a frequency difference (f4-f5) between a 1st offset signal oscillator 104A and a 2nd offset signal oscillator 105A. A optional frequency difference is given to the frequency difference (f4-f5) by selecting properly the oscillated frequencies f5, f4 of the 1st offset signal oscillator 104A and the 2nd offset signal oscillator 105A. Then a transmitter Tx to be tested is connected to an input terminal IN and a receiver Rx to be tested is connected to an output terminal OUT. Thus, the test is conducted by operating both the transmitter Tx and the receiver Rx simultaneously. |
