| 摘要 |
<p>PURPOSE:To enable the multi-relay communication and communication between stations, by branching the automatic gain control signal from the automatic gain control loop of the main signal receiver and superimposing it on the output signal level set signal. CONSTITUTION:The AGC loop controls the reception RCV to the analog signal input to the reception input terminal IN so that the level at the reception output terminal can be specified value. In this case, the output signal of the signal control section CT1 is detected as the difference signal between the variation of the amplitude envelope of the output terminal of RCV and the set reference voltage Vs with the control signal of RCV, and the signal transmitted as the subsignal to monitor and discuss the signal level is picked up at the output of CT1 and input to the signal subtractor SB2 in the automatic level control loop ALC of the transmission section TMR. As a result, the subsignal component transmitted from the preceding station is transmitted to the post station. Further, the monitor signal such as door switching is fed from the terminals ST2... as required and synthesized at CMB, allowing to transmit the desired signal to the post station.</p> |
