Ingress monitoring system
First Claim
1. A noise monitoring system comprising a detector circuit coupled to the return path of a two-way CATV system, the detector circuit providing an output signal indicative of the signal coupled from the return path of a two-way CATV system, and a peak follower circuit coupled to the detector circuit for storing a peak detected output signal from the detector circuit.
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Accused Products
Abstract
A system (10) for monitoring the ingress of noise into the return path (14) of a two-way CATV network comprises a detector circuit (16, 116) coupled to the return path (14) to receive a signal from the return path (14). The detector circuit (16, 116) provides an output signal indicative of the signal coupled from the network. A peak follower circuit (20, 120) coupled to the detector circuit (16, 116) stores a peak detected output signal from the detector circuit (16, 116). Illustratively, the peak follower circuit (20, 120) is coupled to the detector circuit (16, 116) through a filter circuit having a passband, for example, a low pass filter (18, 118). The peak follower circuit (20, 120) stores a peak detected output signal within the passband. A mixer (128) may be included for mixing the signal from the network with a local oscillator (126) frequency to produce a mixed signal, and for supplying the mixed signal to the detector circuit (16, 116).
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Citations
44 Claims
- 1. A noise monitoring system comprising a detector circuit coupled to the return path of a two-way CATV system, the detector circuit providing an output signal indicative of the signal coupled from the return path of a two-way CATV system, and a peak follower circuit coupled to the detector circuit for storing a peak detected output signal from the detector circuit.
- 10. A system for monitoring the ingress of noise into the return path of a two-way CATV network, the system comprising a detector circuit coupled to the return path to receive a signal from the return path, the detector circuit providing an output signal indicative of the signal coupled from the network, and a peak follower circuit coupled to the detector circuit for storing a peak detected output signal from the detector circuit.
- 19. A noise monitoring system comprising a plurality of detectors, a plurality of peak follower circuits, each peak follower circuit coupled to a respective one of the detectors for storing peak detected output signals from respective ones of the detectors, and a controller coupled to the peak follower circuits and configured to receive the amplitudes of the stored peak signals, the controller comprising a controller for interrogating the plurality of peak follower circuits in an established order, for receiving the amplitudes of the stored peak signals from the plurality of peak follower circuits, for subsequently deleting the amplitudes of the stored peak signals, and then for repeating this cycle.
- 28. A system for monitoring the ingress of noise into the return path of a two-way CATV network, the system comprising a plurality of detectors, a plurality of peak follower circuits, each peak follower circuit coupled to a respective one of the detectors for storing a peak detected output signal from the respective one of the detectors, and a controller coupled to the peak follower circuits and configured to receive the amplitudes of the stored peak signals, the controller comprising a polling controller for polling the plurality of peak follower circuits in an established order, for receiving the amplitudes of the stored peak signals from the plurality of peak follower circuits for a time, for deleting the amplitudes of the stored peak signals after the expiration of the time, and then for repeating this cycle.
- 36. A noise monitoring system comprising a detector circuit coupled to an electrical signal source, the detector circuit providing an output signal indicative of the signal coupled from the source, a peak follower circuit coupled to the detector circuit for storing a peak detected output signal from the detector circuit, and a controller coupled to the peak follower circuit and configured to receive and store the amplitude of the stored peak signal and to generate a message if the amplitude of the stored peak signal exceeds a defined threshold.
- 40. A noise monitoring system comprising a mixer for mixing a signal from a signal source with a local oscillator frequency to produce a mixed signal, a detector circuit for receiving the mixed signal from the mixer, the detector circuit providing an output signal indicative of the signal coupled from the source, a peak follower circuit coupled to the detector circuit for storing a peak detected output signal from the detector circuit, a controller coupled to the peak follower circuit and configured to receive and store the amplitude of the stored peak signal.
Specification