| 摘要 |
PURPOSE:To secure easy set-up of the initial action in the case of application of the subordinate synchronizing system by giving the carrier detection signal of the slave station in the form of the transmisstion request signal, and thus to ensure the reestablishment of the transmission preparation even though the automatic equalizer is dispersed. CONSTITUTION:Transmission request signal RS1 of transmission part 1 in the master station is turned on, and thus the carrier sent from the master station is tetected (3) at the slave station. As a result, carrier detection signal CD2 is witched on to be applied to transmission request signal terminal 10 from terminal 9, and transmission request signal RS2 of transmission part 4 in the slave station is turned on. Thus, part 4 transmits the carrier to reception part 2 in the master station, and carrier detection signal CD1 is turned on through detection at part 2. As a result, the transmission request signal of the slave station is not turned on until the carrier detection signal of the slave station is turned on. Therefore, the unnecessary alarm information is never transferred repetitively. |
