Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2004-05-20
2008-08-19
Raymond, Edward (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C725S107000, C348S192000
Reexamination Certificate
active
07415367
ABSTRACT:
A system and method to range a distance to a source of CPD (Common Path Distortion) on a two-way cable system, comprising a local CPD source and a cross-correlator. The local CPD source generates a local distortion signal from a downstream signal, wherein the downstream signal includes multiple carriers of TV channels. The source of CPD in the cable system mixes the carriers of the TV channels to create an upstream actual distortion signal. The cross-correlator performs a cross-correlation between the local distortion signal and the upstream actual distortion signal to create a cross-correlation plot, and the distance to the source of CPD is determined from the round-trip time.
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Arcom Digital, LLC
Charioui Mohamed
Raymond Edward
Trapani Lawrence P.
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