Interactive video distribution systems – Video distribution system with upstream communication – Remote testing of cable system
Reexamination Certificate
2001-07-26
2008-07-01
Nguyen-Ba, Hoang-Vu A (Department: 2623)
Interactive video distribution systems
Video distribution system with upstream communication
Remote testing of cable system
C725S124000, C455S067130, C455S226200, C455S063100, C455S226400
Reexamination Certificate
active
07395548
ABSTRACT:
A system and method of validating signals and detecting signal leakage in a cable communications includes the steps of a) tuning a radio frequency receiver to a carrier frequency of a selected RF channel, b) measuring a signal level of the carrier frequency, c) off-tuning the receiver by a predetermined offset, d) measuring a signal level of the off-tuned carrier frequency, e) obtaining a signal level difference between the signal level of the carrier frequency and the signal level of the off-tuned carrier frequency to determine if interference exists, f) declaring an interference condition if the signal level difference is less than a predetermined difference amount, and g) providing an indication of the signal level of the carrier frequency to permit a determination of whether a signal leakage condition exists.
REFERENCES:
patent: 3895368 (1975-07-01), Gordon et al.
patent: 4072899 (1978-02-01), Shimp
patent: 4491968 (1985-01-01), Shimp et al.
patent: 4520508 (1985-05-01), Reichert, Jr.
patent: 5073822 (1991-12-01), Gumm et al.
patent: 5294937 (1994-03-01), Ostteen et al.
patent: 5493210 (1996-02-01), Orndorff et al.
patent: 5608428 (1997-03-01), Bush
patent: 5633582 (1997-05-01), Orndorff et al.
patent: 5777662 (1998-07-01), Zimmerman
patent: 5939887 (1999-08-01), Schmidt et al.
patent: 5982165 (1999-11-01), Bowyer et al.
patent: 6005518 (1999-12-01), Kallina
patent: 6018358 (2000-01-01), Bush
patent: 6049693 (2000-04-01), Baran et al.
patent: 2003/0206559 (2003-11-01), Trachewsky et al.
patent: 2005/0220180 (2005-10-01), Barlev et al.
Comsonics, Inc.
Nguyen-Ba Hoang-Vu A
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