04454538 is referenced by 132 patents and cites 4 patents.

A CATV system having a central facility connected through cables to a number of terminal units to establish two-way data communication. Each terminal unit includes a PLL that oscillates at a frequency corresponding to a channel selected. A frequency divider circuit subjects an output frequency of the PLL circuit to frequency division to provide a carrier frequency for an up-stream data signal. The central facility transmits programs and down-stream data signals through a plurality of channels. Each terminal unit transmits an up-stream data signal to the central facility by using an exclusive frequency corresponding to a channel selected.

Title
Data communication in CATV system
Application Number
6/401431
Publication Number
4454538
Application Date
July 23, 1982
Publication Date
June 12, 1984
Inventor
Hiroshi Toriumi
Tokyo
JP
Agent
Sughrue Mion Zinn Macpeak & Seas
Assignee
Pioneer Electronic Corporation
JP
IPC
H04N 7/10
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