KR890004437B1 - Upstream signal control devices of pair direction cable television - Google Patents

Upstream signal control devices of pair direction cable television

Info

Publication number
KR890004437B1
KR890004437B1 KR8509597A KR850009597A KR890004437B1 KR 890004437 B1 KR890004437 B1 KR 890004437B1 KR 8509597 A KR8509597 A KR 8509597A KR 850009597 A KR850009597 A KR 850009597A KR 890004437 B1 KR890004437 B1 KR 890004437B1
Authority
KR
South Korea
Prior art keywords
given time
control devices
signal control
cable television
upstream signal
Prior art date
Application number
KR8509597A
Other languages
Korean (ko)
Inventor
Akkinori Matsuko
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP59266362A external-priority patent/JPS61144993A/en
Priority claimed from JP59266359A external-priority patent/JPS61144991A/en
Priority claimed from JP59266358A external-priority patent/JPS61145697A/en
Application filed by Toshiba Corp filed Critical Toshiba Corp
Application granted granted Critical
Publication of KR890004437B1 publication Critical patent/KR890004437B1/en

Links

Landscapes

  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The system has a device for generating a release signal to send the return data to the centre within a given time. A carrierwave generator generates a carrier wave during the release signal in the given time. A modulation device modulates the carrier wave using the return data. A control device interrupts the generator to prevent it exceeding the given time. The control device has a detector to detect the appearance of the carrier wave and to stop the generator when the release signal exceeds the given time. The control device includes the detector, a timing circuit and a switch.
KR8509597A 1984-12-19 1985-12-19 Upstream signal control devices of pair direction cable television KR890004437B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP59266362A JPS61144993A (en) 1984-12-19 1984-12-19 Bidirectional catv
JP59266359A JPS61144991A (en) 1984-12-19 1984-12-19 Bidirectional catv
JP59266358A JPS61145697A (en) 1984-12-19 1984-12-19 Automatic dispensor

Publications (1)

Publication Number Publication Date
KR890004437B1 true KR890004437B1 (en) 1989-11-03

Family

ID=27335461

Family Applications (1)

Application Number Title Priority Date Filing Date
KR8509597A KR890004437B1 (en) 1984-12-19 1985-12-19 Upstream signal control devices of pair direction cable television

Country Status (1)

Country Link
KR (1) KR890004437B1 (en)

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Year of fee payment: 11

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