| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a testing device for transmission apparatus capable of improving workability in testing two four-wire relay transmission apparatuses connected via an intermediate distribution board. <P>SOLUTION: A testing device for transmission apparatus comprises a master unit 10 and a slave unit 20. The master unit 10 is connected to a four-wire relay transmission apparatus 110 via a spring cord and includes a function for transmitting a test signal and a slave unit side switch control signal to the slave unit 20 via audio signal lines of four-wire relay transmission apparatuses 110 and 120 and a function for transmitting a DC voltage used for a geomagnetic test to the slave unit 20 via geomagnetic signal lines of the four-wire relay transmission apparatuses 110 and 120. The slave unit 20 is connected to the four-wire relay transmission apparatus 120 via a spring cord and includes a function for detecting a reception level of the test signal from the master unit 10 and a voltage value of the DC voltage from the master unit 10 and a function for transmitting the reception level and voltage value detection data to the master unit 10 via the audio signal lines of the four-wire relay transmission apparatuses 110 and 120. <P>COPYRIGHT: (C)2013,JPO&INPIT |
