H - Electricity – 04 – B
Patent
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
Abe Akira
Hashimoto Hiromi
Takenaka Toshiyuki
Taniguchi Koyo
Nippon Electric Co. Ltd.
Smart & Biggar
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