| 摘要 |
<p>PURPOSE:To realize the measurement of transmission for many incoming lines with less number of measuring devices, by using one measuring device for two incoming lines. CONSTITUTION:When contacts of a changeover circuit 1 are present at the positions as shown in a figure, signals incoming from the incoming lines 2a-2m are inputted to measuring devices 6a-6g via incoming circuits 1a-1m, and the circuit 1, and read by a controller 2. When the measurement of the signal level of the lines 2a-2m is finished and the circuit 1 is changed over by a device 2, the signals of the incoming lines 2b-2m are inputted to the measuring devices 6a-6g via the circuit 1 and read by the device 2. Since this circuit uses one measuring device for the two incoming lines, the number of the measuring devices is halved and the automatic measurement is attained also.</p> |
