G - Physics – 01 – R
Patent
G - Physics
01
R
324/30
G01R 31/28 (2006.01) H04B 17/02 (2006.01) H04N 7/173 (2006.01)
Patent
CA 1131311
ABSTRACT OF THE DISCLOSURE Apparatus and method for monitoring the quality and integrity of a communications system, such as a cable television system, which includes several monitoring circuits placed throughout the system to detect and amplify RF or audio frequen- cy signals received at any number of selected points. The de- tected signals are used to amplitude modulate a continuous wave oscillator at a selected one of several discrete frequencies identifiable with the position of the monitoring circuits. The modulated CW signals are then fed upstream for processing at a central location. Each monitoring network includes a broadband detector so as to enable the detection of one or more discrete frequency signals or a band of signals. The use of several dis- crete frequency signals for normal monitoring purposes allows reliable monitoring to be carried out on a continuous basis with- out causing interference to the information signals being trans- mitted through the system. If a fault or deviation is detected, a swept band of signals can be fed into the system whereupon the monitor circuits will detect the entire band and return to the central point a full frequency response pattern to facilitate detailed analysis. -1-
311721
Bereskin & Parr
Broadband Technologies Inc.
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