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AssigneeAdvent Networks, Inc.
InventorsLance R. Reidhead, Walt Evanyk
Estimating the term…
A switch router and one or more gateways incorporating a diagnostic and calibration system that performs RF characterization of an underlying cable plant. The switch router is connected at a point of insertion or point of distribution and each gateway is located downstream, such as at corresponding subscriber locations. The switch router and each gateway sends a test signal with known characteristics and power level, and the receiving device determines noise level and power loss for the corresponding downstream and upstream channel pair. The power loss information is used to calibrate the power level of the transmitters. The noise levels are used to determine if the selected modulation schemes employed for normal communications is realizable. A frequency analysis, such as FFT or the like, is performed on the upstream test signal spectrum to derive valuable frequency information for the upstream channel or the entire upstream bandwidth.
A bi-directional cable communication system configured to communicate information via a cable network, the cable communication system incorporating diagnostic and calibration logic, the cable communication system comprising:
A communication system configured to communicate across a cable system having a point of distribution and at least one downstream subscriber cable link, the communication system configured to operate in a diagnostic and calibration mode, the communication system comprising:
A method of characterizing a cable network and calibrating a bi-directional cable communication system, comprising:
Dependencies are inferred from the claim text.