| 摘要 |
<p>PURPOSE:To easily and quickly conduct various tests by remote control from a base station by providing a branching filter, a reflecting oscillator and a broad band frequency mixer, combining a transmission frequency and transmission signal at the base station so as to set various test items easily as required. CONSTITUTION:A radio wave led from an LCX 4 is given to a broad band frequency mixer 7 by a branching filter 6, the result is mixed with a frequency from a folding oscillator 8, converted into a frequency in a base station reception frequency band and sent toward the base station 1 while being led toward the LCX 4 by the branching filter 6 again. The supervision/control of the folding oscillator 8 is controlled remotely from the base station 1 via an SV/RC LINE 5 being a remote control means. The radio wave subjected to frequency conversion passes through the return of the LCX 4, amplified and relayed by a radio repeater 2 and returned to the base station. Thus, diversified various test items are set by combining the transmission frequencies and transmission signals to measure the corresponding return signal thereby executing the various tests of all paths as the transmission system.</p> |
