JPS57106289A - Abnormality corresponding method on catv system - Google Patents
Abnormality corresponding method on catv systemInfo
- Publication number
- JPS57106289A JPS57106289A JP55182663A JP18266380A JPS57106289A JP S57106289 A JPS57106289 A JP S57106289A JP 55182663 A JP55182663 A JP 55182663A JP 18266380 A JP18266380 A JP 18266380A JP S57106289 A JPS57106289 A JP S57106289A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- downward data
- data signal
- terminal equipment
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/12—Arrangements for observation, testing or troubleshooting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/78—CATV [Community Antenna Television] systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Small-Scale Networks (AREA)
- Details Of Television Systems (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55182663A JPS57106289A (en) | 1980-12-22 | 1980-12-22 | Abnormality corresponding method on catv system |
CA000392141A CA1171165A (en) | 1980-12-22 | 1981-12-11 | Fail-safe catv system center facility |
US06/329,914 US4427995A (en) | 1980-12-22 | 1981-12-11 | Fail-safe CATV system center facility |
GB8137611A GB2090108B (en) | 1980-12-22 | 1981-12-14 | Fail-safe catv system center facility |
DE3150515A DE3150515C2 (de) | 1980-12-22 | 1981-12-21 | Kabelfernsehnetz |
FR8123959A FR2497048B1 (fr) | 1980-12-22 | 1981-12-22 | Installation centrale pour reseau de television par antenne commune et cable protegee contre les defaillances |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55182663A JPS57106289A (en) | 1980-12-22 | 1980-12-22 | Abnormality corresponding method on catv system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57106289A true JPS57106289A (en) | 1982-07-02 |
JPS6351595B2 JPS6351595B2 (ja) | 1988-10-14 |
Family
ID=16122253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55182663A Granted JPS57106289A (en) | 1980-12-22 | 1980-12-22 | Abnormality corresponding method on catv system |
Country Status (6)
Country | Link |
---|---|
US (1) | US4427995A (ja) |
JP (1) | JPS57106289A (ja) |
CA (1) | CA1171165A (ja) |
DE (1) | DE3150515C2 (ja) |
FR (1) | FR2497048B1 (ja) |
GB (1) | GB2090108B (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4837786A (en) * | 1986-08-07 | 1989-06-06 | Comstream Corporation | Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying |
US5257396A (en) * | 1991-09-17 | 1993-10-26 | Zenith Electronics Corporation | Dual in-band/out-of-band CATV system |
US5898899A (en) * | 1996-11-25 | 1999-04-27 | Thomas & Betts International, Inc. | RF broadband amplifier bypass method and apparatus |
US6792542B1 (en) * | 1998-05-12 | 2004-09-14 | Verance Corporation | Digital system for embedding a pseudo-randomly modulated auxiliary data sequence in digital samples |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3869564A (en) * | 1973-08-30 | 1975-03-04 | American Electronic Lab | Trunk switching system |
US3886302A (en) * | 1974-01-28 | 1975-05-27 | Hughes Aircraft Co | Closed circuit television modem sharing system |
US4032972A (en) * | 1976-06-23 | 1977-06-28 | Idr, Inc. | Piggy back row grabbing system |
JPS5647182A (en) * | 1979-09-26 | 1981-04-28 | Pioneer Electronic Corp | Special channel image receiver and its answering device of catv system |
DE3029803C2 (de) * | 1980-08-06 | 1982-12-16 | Siemens AG, 1000 Berlin und 8000 München | Kabelfernsehsystem |
-
1980
- 1980-12-22 JP JP55182663A patent/JPS57106289A/ja active Granted
-
1981
- 1981-12-11 US US06/329,914 patent/US4427995A/en not_active Expired - Lifetime
- 1981-12-11 CA CA000392141A patent/CA1171165A/en not_active Expired
- 1981-12-14 GB GB8137611A patent/GB2090108B/en not_active Expired
- 1981-12-21 DE DE3150515A patent/DE3150515C2/de not_active Expired
- 1981-12-22 FR FR8123959A patent/FR2497048B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2497048A1 (fr) | 1982-06-25 |
GB2090108A (en) | 1982-06-30 |
CA1171165A (en) | 1984-07-17 |
DE3150515A1 (de) | 1982-07-01 |
GB2090108B (en) | 1984-07-18 |
FR2497048B1 (fr) | 1986-07-04 |
US4427995A (en) | 1984-01-24 |
DE3150515C2 (de) | 1983-07-21 |
JPS6351595B2 (ja) | 1988-10-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR900004129A (ko) | 광파 송신기 및 상호 변조 발생 억제방법 | |
DE3463993D1 (en) | Apparatus for detecting tapping of light energy from an optical fiber | |
JPS6411430A (en) | Radio communication system | |
JPS57106289A (en) | Abnormality corresponding method on catv system | |
JPS56104561A (en) | Data transmission system | |
EP0340973A3 (en) | Improvements relating to electrical control systems | |
EP0314930A3 (en) | Method and apparatus for transmitting control signals to actuators in television satellite receivers | |
JPS56114450A (en) | Signal transmission system | |
JPS568936A (en) | Supervisory system for fault of transmission line | |
JPS57150236A (en) | Channel shared type receiving device | |
JPH071870Y2 (ja) | 光中継器の警報指示信号送出回路 | |
SU1681319A1 (ru) | Устройство дл передачи и приема телеметрической информации | |
JPS5755642A (en) | Branch circuit communication system | |
JPS5628553A (en) | Data transmission system | |
JPS6436239A (en) | Multiplex transmission equipment | |
JPS59176937A (ja) | 光中継伝送路監視方式 | |
JPS5765930A (en) | Searching method for fault of optical fiber transmission system | |
JPS5664544A (en) | Data collecting system | |
JPS56108138A (en) | Monitor system for computer system | |
JPS56149133A (en) | Optical data link | |
JPS6464423A (en) | System for transmitting optical signal | |
JPS5779747A (en) | Coupling circuit | |
JPS55150639A (en) | Data transmission unit | |
JPS56143739A (en) | Data remote monitoring system | |
JPS57111143A (en) | Optical communication system |