JPS5544206A - Back up unit for main line system in catv system - Google Patents
Back up unit for main line system in catv systemInfo
- 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
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
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)
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 |
-
1978
- 1978-06-16 JP JP7223778A patent/JPS5544206A/en active Granted
Cited By (2)
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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