| 摘要 |
PURPOSE:To confirm the end of operation of a controlled system by using a power line as a signal transmission line to transmit an operation command signal from a master set to a slave set and allowing the master set to discriminate the operation end signal from the slave set. CONSTITUTION:A carrier signal transmitted from an f0 fundamental wave oscillating section 1 in a master set A is modulated at an amplitude modulation section 3 by using a modulation wave from an f2 modulation wave oscillating section 2, power- amplified by a power amplifier section 4 and transmitted to a distribution line 25 via an input/output coupling transformer 5 under the control of an operating section 7. On the other hand, a signal from the distribution line 25 is received by an input/ output coupling transformer 24 at a slave set B, resulting that the controlled system is commanded via an f0 tuning amplifier section 19, a detection section 16, an f2 tuning amplifier section 17 and a waveform shaping section 18. Its operation end signal is transmitted to a transformer 5 of the master set A via a power amplifier section 23, the transformer 24 and the distribution line 25, only the modulation wave being a confirming signal is subject to tuning amplification by an f1 tuning amplifier section 10 of a reception section C, and subject to waveform shaping 11 for discrimination. |
