JPS5544206A - Back up unit for main line system in catv system - Google Patents

Back up unit for main line system in catv system

Info

Publication number
JPS5544206A
JPS5544206A JP7223778A JP7223778A JPS5544206A JP S5544206 A JPS5544206 A JP S5544206A JP 7223778 A JP7223778 A JP 7223778A JP 7223778 A JP7223778 A JP 7223778A JP S5544206 A JPS5544206 A JP S5544206A
Authority
JP
Japan
Prior art keywords
amplifier
monitor
unit
transmission line
signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP7223778A
Other languages
Japanese (ja)
Other versions
JPS624919B2 (en
Inventor
Takeshi Takeuchi
Masakatsu Watanabe
Minoru Nakada
Kiyotoshi Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hochiki Corp
Original Assignee
Hochiki 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
Application filed by Hochiki Corp filed Critical Hochiki Corp
Priority to JP7223778A priority Critical patent/JPS5544206A/en
Publication of JPS5544206A publication Critical patent/JPS5544206A/en
Publication of JPS624919B2 publication Critical patent/JPS624919B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Details Of Television Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

PURPOSE: To enable to perform effective monitor by using the auxiliary transmission line, through the selection of a failure in the main line system to the spare system only for the faulty section.
CONSTITUTION: The reception television signal from the antenna 1 is transmitted to the amplifiers 7-1∼7-n having the branched output located along the transmission line 3 via one of the existing and spare head ends 2a and 2b. Each amplifier is provided with the main power supplies 8-1∼8-n, spare power supplies 9-1∼9-n, and back up units 11-1∼11-n. The back up unit monitors the output level of the corresponding amplifier to perform the monitor of power failure and power supply selection control, and delivers the monitor signal specific to those units to the auxiliary transmission line 10. The central monitor unit 6 monitors the head end and delivers the television signal to the transmission line 10 when detecting the faulty amplifier with the monitor signal from the back up unit and adds this signal to the preceding amplifier of the faulty amplifier.
COPYRIGHT: (C)1980,JPO&Japio
JP7223778A 1978-06-16 1978-06-16 Back up unit for main line system in catv system Granted JPS5544206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7223778A JPS5544206A (en) 1978-06-16 1978-06-16 Back up unit for main line system in catv system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7223778A JPS5544206A (en) 1978-06-16 1978-06-16 Back up unit for main line system in catv system

Publications (2)

Publication Number Publication Date
JPS5544206A true JPS5544206A (en) 1980-03-28
JPS624919B2 JPS624919B2 (en) 1987-02-02

Family

ID=13483468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7223778A Granted JPS5544206A (en) 1978-06-16 1978-06-16 Back up unit for main line system in catv system

Country Status (1)

Country Link
JP (1) JPS5544206A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616256A (en) * 1983-03-23 1986-10-07 Societe Anonyme De Telecommunications Television channel distribution network
US6112223A (en) * 1995-04-26 2000-08-29 International Business Machines Corporation Apparatus for fault-tolerant multimedia program distribution

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616256A (en) * 1983-03-23 1986-10-07 Societe Anonyme De Telecommunications Television channel distribution network
US6112223A (en) * 1995-04-26 2000-08-29 International Business Machines Corporation Apparatus for fault-tolerant multimedia program distribution

Also Published As

Publication number Publication date
JPS624919B2 (en) 1987-02-02

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