CA2390000A1 - System and method for signal validation and leakage detection - Google Patents

System and method for signal validation and leakage detection Download PDF

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Publication number
CA2390000A1
CA2390000A1 CA002390000A CA2390000A CA2390000A1 CA 2390000 A1 CA2390000 A1 CA 2390000A1 CA 002390000 A CA002390000 A CA 002390000A CA 2390000 A CA2390000 A CA 2390000A CA 2390000 A1 CA2390000 A1 CA 2390000A1
Authority
CA
Canada
Prior art keywords
signal level
carrier frequency
signal
leakage detection
tuning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002390000A
Other languages
French (fr)
Other versions
CA2390000C (en
Inventor
Joseph Donald Runzo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Comsonics Inc
Original Assignee
Joseph Donald Runzo
Comsonics, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joseph Donald Runzo, Comsonics, Inc. filed Critical Joseph Donald Runzo
Publication of CA2390000A1 publication Critical patent/CA2390000A1/en
Application granted granted Critical
Publication of CA2390000C publication Critical patent/CA2390000C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
    • H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/23—Indication means, e.g. displays, alarms, audible means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/354—Adjacent channel leakage power

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.
CA002390000A 2001-07-26 2002-06-10 System and method for signal validation and leakage detection Expired - Fee Related CA2390000C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/915,966 US7395548B2 (en) 2001-07-26 2001-07-26 System and method for signal validation and leakage detection
US09/915,966 2001-07-26

Publications (2)

Publication Number Publication Date
CA2390000A1 true CA2390000A1 (en) 2003-01-26
CA2390000C CA2390000C (en) 2008-09-02

Family

ID=25436487

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002390000A Expired - Fee Related CA2390000C (en) 2001-07-26 2002-06-10 System and method for signal validation and leakage detection

Country Status (2)

Country Link
US (1) US7395548B2 (en)
CA (1) CA2390000C (en)

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Also Published As

Publication number Publication date
US20030022645A1 (en) 2003-01-30
US7395548B2 (en) 2008-07-01
CA2390000C (en) 2008-09-02

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Effective date: 20130611