System and method for signal validation and leakage detection

Details System and method for signal validation and leakage detection System and method for signal validation and leakage detection

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.

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