FAULT LOCATING APPARATUS FOR DIGITAL TRANSMISSION SYSTEM

FAULT LOCATING APPARATUS FOR DIGITAL TRANSMISSION SYSTEM Defective repeaters in a multihop, digital microwave transmission systems are located by the use of a special test pattern which is generated at the transmitting terminal. At each repeater station, the two outputs of the phase demodulator are...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	SLADE, RICHARD P, LENTZ, GEORGE H
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	FAULT LOCATING APPARATUS FOR DIGITAL TRANSMISSION SYSTEM Defective repeaters in a multihop, digital microwave transmission systems are located by the use of a special test pattern which is generated at the transmitting terminal. At each repeater station, the two outputs of the phase demodulator are compared to determine if the test pattern has been properly received from the upstream repeaters. The special test pattern, S, has the characteristic that ; that is to say, the test pattern equals the complement of itself delayed by 2N symbols. This special characteristic makes it unnecessary to employ a differential decoder in the test apparatus at each repeater station. - i