Coaxial cable RF leakage detector
First Claim
1. A method of remote leak detection for a coaxial cable RF transmission system comprising the steps of:
- sensing an FM signal;
sensing an AM signal;
sensing a noise signal; and
determining that a leak exists based on a presence of the FM and the AM signals as well as the noise signal.
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Accused Products
Abstract
A cable leakage detection system to be placed in a moving vehicle for monitoring signals leaking from a coaxial cable network. AM and FM RF detectors are combined with a global positioning system, a microprocessor, a storage device, a display device, and an antenna to unambiguously measure the radio frequency signal strength of an RF leak. The leakage detection system can indicate whether the leak is occurring in the left or right side of the vehicle. An operator can, by observing the unique display, determine whether the received RF energy is a leak from the coaxial cable system or a spurious signal from some other source. The cable leakage detection system can unambiguously detect an RF leak and store the vehicular leakage index, the RF signal level, the distance from the coaxial cable, the frequency of the signal, the geographic location, and the time of the detected leak.
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Citations
17 Claims
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1. A method of remote leak detection for a coaxial cable RF transmission system comprising the steps of:
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sensing an FM signal; sensing an AM signal; sensing a noise signal; and determining that a leak exists based on a presence of the FM and the AM signals as well as the noise signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for remote leak detection for a coaxial cable RF transmission system comprising:
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means for sensing an FM signal functioning to detect a carrier component and a modulated component in a selectable frequency band; means for sensing an AM signal functioning to detect a selectable frequency band; and means for sensing a noise signal in a selectable frequency band and functioning to determine that a leak exists based on the noise signal, and a presence of both the FM and the AM signals. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A monitoring system for monitoring leakage in a radio frequency cable distribution system comprising:
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means for sensing an FM signal functioning to detect a carrier component and a modulated component in a selectable frequency band; means for sensing an AM signal functioning to detect a selectable frequency band; means for determining that a leak exists based on a presence of both the FM and the AM signals; means for determining the geographic location of the monitoring system; and means for storing information from said means for determining that a leak exists based on a presence of both the FM and the AM signals and information from said means for determining the geographic location of the monitoring system, so that information relating to the presence and location of the leak may be stored together. - View Dependent Claims (17)
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Specification