Failure compensating drop channel microwave radio relay system

Abstract

Abstract A MICROWAVE RADIO RELAY SYSTEM IS PROVIDED IN ACCORDANCE WITH THE TEACHINGS OF THE PRESENT INVENTION WHEREIN THE TRANSMISSION QUALITY OF TELEVISION SIGNALS BEING TRANSMITTED IN A SPARE RADIO CHANNEL IS MAINTAINED AND THE DISTORTION THEREOF DUE TO THE ERRONEOUS INSERTION OF TELEPHONY SIGNALS THEREIN IS COMPLETELY AVOIDED. IN ONE EMBODIMENT OF THE PRESENT INVENTION A MICROWAVE RADIO RELAY SYSTEM INCLUDING FIRST AND SECOND BASEBAND TERMINAL STATIONS AND AT LEAST ONE LEAK-INSERTION STATION IS PROVIDED WITH AT LEAST ONE TELEVISION SIGNAL TRANSMITTING RADIO CHANNEL, AT LEAST ONE TELEPHONY SIGNAL TRANSMITTING RADIO CHANNEL AND AT LEAST ONE SPARE RADIO CHANNEL CAPABLE OF REPLACING EITHER OF SAID TRANSMITTING RADIO CHANNELS UPON THE DETECTION OF A FAILURE THEREIN. EACH OF SAID RADIO CHANNELS IS DIRECTED FOR TRANSMISSION IN ONE DIRECTION AND IN ADDITION, AT LEAST ONE TELEPHONY SIGNAL RADIO CHANNEL AND AT LEAST ONE SPARE RADIO CHANNEL IS PROVIDED FOR OPPOSITELY DIRECTED TRANSMISSION. THE LEAK-INSERTION STATION IS PROVIDED WITH BRANCHING OUT AND INSERTION CAPABILITIES FOR TELEPHONY SIGNALS IN EITHER TRANSMISSION DIRECTION, HOWEVER, THE INSERTION AND BRANCHING OUT OF TELEPHONY SIGNALS BEING TRANSMITTED IN SAID ONE DIRECTION IS ACCOMPLISHED ONLY IN CONJUNCTION WITH THE RADIO CHANNELS DIRECTED FOR TRANSMISSION IN THE OPPOSITE DIRECTION. THUS, TELEPHONY SIGNALS FOR INSERTION ARE NEVER INTRODUCED DIRECTLY INTO RADIO CHANNELS DIRECTED IT SAID ONE DIRECTION BUT ARE ONLY INSERTED AT A POINT WHERE TELEPHONY SIGNALS ARE NORMALLY PROVIDED THEREFOR. ACCORDINGLY, THE ERRONEOUS INSERTION OF TELEPHONY SIGNAL IN A SPARE RADIO CHANNEL TRANSMITTING TELEVISION SIGNALS CANNOT BE CAUSED BY FAULTY SWITCHING.

Inventors

• 👤 Haruo Shiki
• 👤 Takaaki Taniya

Bibliographic Details