发明名称 |
Dual in-band/out-of-band CATV system |
摘要 |
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.
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申请公布号 |
US5257396(A) |
申请公布日期 |
1993.10.26 |
申请号 |
US19910761106 |
申请日期 |
1991.09.17 |
申请人 |
ZENITH ELECTRONICS CORPORATION |
发明人 |
AULD, JR., FREDERICK H.;LONG, MICHAEL E.;MORELAND, LARRY K. |
分类号 |
H04N7/167;(IPC1-7):H04B17/00 |
主分类号 |
H04N7/167 |
代理机构 |
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地址 |
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