Invention Grant
- Patent Title: Establishing a return path in a forward path cable television testing environment
- Patent Title (中): 在前进路径有线电视测试环境中建立回路
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Application No.: US10865167Application Date: 2004-06-10
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Publication No.: US07707615B2Publication Date: 2010-04-27
- Inventor: Dennis Musser , Marin Moreno
- Applicant: Dennis Musser , Marin Moreno
- Applicant Address: US NY New York
- Assignee: Time Warner Cable, Inc.
- Current Assignee: Time Warner Cable, Inc.
- Current Assignee Address: US NY New York
- Agency: The Marbury Law Group, PLLC
- Main IPC: H04N7/173
- IPC: H04N7/173

Abstract:
A system and method for establishing a return path in a cable television test environment. A cable television test environment comprising a plurality of head-ends connected to a plurality of set top boxes through a one-way forward matrix switch having “M” inputs and “N” outputs is adapted to provide a reverse path for each of the available “N” outputs. A low band reverse signal is received from each of a plurality of set top boxes. The low band reverse signal from each of the plurality of set top boxes is combined to produce a composite signal. The composite signal is split into a plurality of composite signal sources. Each of the composite signal sources is sent to each of the plurality of head-ends (M) via the transmission means connecting that head-end to the matrix switch. The low band composite QPSK signal from the source diplexer travels in the reverse direction to the head-end. Each head-end is assigned a unique set of frequencies for return communications from the STBs serviced by that head-end. A QPSK demodulator in a head-end demodulates its assigned return frequencies as they appear in the low band composite QPSK signal.
Public/Granted literature
- US20050276226A1 Establishing a return path in a forward path cable television testing environment Public/Granted day:2005-12-15
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