Service channel signal transmission system

Details Service channel signal transmission system Service channel signal transmission system

H - Electricity

04

B

325/9

H04B 7/15 (2006.01) H04B 1/74 (2006.01) H04B 17/00 (2006.01)

Patent

CA 1189571

Abstract of the Disclosure A service channel signal transmission system in which a service channel signal is constantly fed to at least two radio channels in parallel. Each intermediate repeater station has a service channel demodulator which is constantly connected to either one of the radio channels. A combining and switching circuit automatically switches over the service channel demodulator to the other radio channel in response to an alarm output which indicates an abnormality in a received signal at a receiver associated with the one radio channel. The service channel is completely switched from one to the other without resorting to line switchover control signals from terminal stations.

420818

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