05257396 is referenced by 20 patents and cites 10 patents.

A dual in-band/out-of-band CATV receiver includes a coupler that couples input signals to a tuner and decoder for demodulation and recovery of in-band data and to an FSK receiver for recovery of out-of-band data. The recovered data outputs of the decoder and of the FSK receiver are coupled to a data switch that has a common output that is coupled to a tuner/decoder microprocessor. The tuner/decoder microprocessor in turn supplies information to a switch microprocessor for controlling operation of the data switch to couple either in-band or out-of-band data to the tuner/decoder microprocessor. The data switch defaults to the in-band data position whenever a channel change occurs.

Title
Dual in-band/out-of-band CATV system
Application Number
7/761106
Publication Number
5257396
Application Date
September 17, 1991
Publication Date
October 26, 1993
Inventor
Larry K Moreland
McHenry
IL, US
Michael E Long
Oakbrook
IL, US
Frederick H Auld Jr
Barrington
IL, US
Assignee
Zenith Electronics Corporation
IL, US
IPC
H04B 17/00
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