Television – Special applications – Manufacturing
Patent
1994-03-21
1995-12-05
Chin, Tommy P.
Television
Special applications
Manufacturing
H04N 710, H04N 714, H04N 7173
Patent
active
054733618
ABSTRACT:
A test and measurement system for a cable television (CATV) system measures parameters of a broadband video signal at the headend of the CATV system. Characteristic data is generated from the measured parameters and combined with the broadband video signal for transmission over the distribution system of the CATV system. Also out of service video channels are detected at the headend, and a test sequence is combined with the broadband video signal for each out of service channel. In the field a receiver is coupled to a point in the distribution system to measure the parameters of the broadband video signal at that point. The parameters measured at the receiver are compared with the parameters measured at the headend, as derived from the transmitted characteristic data. The differences between the two sets of parameters are displayed to present a display of the characteristics of the CATV system, with out of service channels represented by the test sequences.
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Chin Tommy P.
Gray Francis I.
Le Vu
Tektronix Inc.
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