| 摘要 |
PURPOSE:To simplify the testing system of a radio equipment for performing simultaneous bi-directional communication by utilizing the characteristic of the simultanoeous bi-directional communication for which different frequencies are used. CONSTITUTION:A radio equipment control part 2 changes the modulation state, the transmission output and the frequency of a radio equipment according to the contents of a test to be performed. The transmission wave from a radio equipment 1 is added to the antenna terminal of the radio equipment 1 via a circulator 8. Because simultaneous bi-directional communication is possible, a transmission part and a reception part are simultaneously possible to be used, the self transmission wave for which a frequency conversion is performed is detected by a reception part and the wave appears as the voice output of the radio equipment. As for this voice output, transmission distortion, reception sensibility and an S/N, etc., are measured by an audio analyzer 6. |
