JPS53106554A - Monitoring system for spare oscillator in subsidiary synchronizing network - Google Patents
Monitoring system for spare oscillator in subsidiary synchronizing networkInfo
- Publication number
- JPS53106554A JPS53106554A JP2184077A JP2184077A JPS53106554A JP S53106554 A JPS53106554 A JP S53106554A JP 2184077 A JP2184077 A JP 2184077A JP 2184077 A JP2184077 A JP 2184077A JP S53106554 A JPS53106554 A JP S53106554A
- Authority
- JP
- Japan
- Prior art keywords
- monitoring system
- synchronizing network
- spare
- oscillator
- spare oscillator
- 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
Abstract
PURPOSE: To simplify the constitution of monitoring, by performing monitor with high accuracy and high reliability through taking the frequency transmitted as the reference frequency when the frequency information branching path is normal, and by inhibiting the monitor of spare oscillator in independent synchronizing condition so that useless alarm is not transmitted.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52021840A JPS6023558B2 (en) | 1977-02-28 | 1977-02-28 | Standby oscillator monitoring method in dependent synchronous network |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52021840A JPS6023558B2 (en) | 1977-02-28 | 1977-02-28 | Standby oscillator monitoring method in dependent synchronous network |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53106554A true JPS53106554A (en) | 1978-09-16 |
JPS6023558B2 JPS6023558B2 (en) | 1985-06-07 |
Family
ID=12066268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52021840A Expired JPS6023558B2 (en) | 1977-02-28 | 1977-02-28 | Standby oscillator monitoring method in dependent synchronous network |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6023558B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56128091A (en) * | 1980-03-13 | 1981-10-07 | Fujitsu Ltd | Clock distribution system |
JPS61173600A (en) * | 1985-01-29 | 1986-08-05 | Fujitsu Ltd | Selecting circuit of clock signal |
JPS61260798A (en) * | 1985-05-15 | 1986-11-18 | Hitachi Ltd | Route selecting circuit |
JPS62262539A (en) * | 1986-05-09 | 1987-11-14 | Hitachi Ltd | Subsequent synchronizing system |
JPH0316441A (en) * | 1989-06-14 | 1991-01-24 | Fujitsu Ltd | Slave synchronizing clock selection system |
JPH04175028A (en) * | 1990-07-23 | 1992-06-23 | Fujitsu Ltd | Transmission line interface circuit for multi-channel connector |
-
1977
- 1977-02-28 JP JP52021840A patent/JPS6023558B2/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56128091A (en) * | 1980-03-13 | 1981-10-07 | Fujitsu Ltd | Clock distribution system |
JPS6250035B2 (en) * | 1980-03-13 | 1987-10-22 | Fujitsu Kk | |
JPS61173600A (en) * | 1985-01-29 | 1986-08-05 | Fujitsu Ltd | Selecting circuit of clock signal |
JPH0787625B2 (en) * | 1985-01-29 | 1995-09-20 | 富士通株式会社 | Clock signal selection circuit |
JPS61260798A (en) * | 1985-05-15 | 1986-11-18 | Hitachi Ltd | Route selecting circuit |
JPS62262539A (en) * | 1986-05-09 | 1987-11-14 | Hitachi Ltd | Subsequent synchronizing system |
JPH0316441A (en) * | 1989-06-14 | 1991-01-24 | Fujitsu Ltd | Slave synchronizing clock selection system |
JPH04175028A (en) * | 1990-07-23 | 1992-06-23 | Fujitsu Ltd | Transmission line interface circuit for multi-channel connector |
Also Published As
Publication number | Publication date |
---|---|
JPS6023558B2 (en) | 1985-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS53124943A (en) | Composite information processor | |
JPS52129541A (en) | Signal judging system | |
JPS53106554A (en) | Monitoring system for spare oscillator in subsidiary synchronizing network | |
JPS53108215A (en) | Monitor system | |
JPS5421146A (en) | Failure detector | |
JPS5234332A (en) | System disturbance detector | |
JPS5336437A (en) | Transmission data monitor unit | |
JPS52113199A (en) | Automatic communicating unit | |
JPS5375707A (en) | Fault detection system | |
JPS5376797A (en) | Receiver of fire alarm system | |
JPS5434699A (en) | Urgento display system | |
JPS5242308A (en) | Multiplex frequency signal receiver | |
JPS5376798A (en) | Receiver of fire alarm system | |
JPS5376799A (en) | Receiver of fire alarm system | |
JPS53118948A (en) | Synchronizing unit | |
JPS5424567A (en) | Reproducing method of carrier | |
JPS5376789A (en) | Receiver of fire system | |
JPS5357604A (en) | Open-circuit type train detecting device attached to closed-circuit type ac track circuit | |
JPS5314353A (en) | Decision circuit for inverter actuation | |
JPS5394810A (en) | Signal monitor system | |
JPS5376786A (en) | Receiver of fire alarm system | |
JPS53139902A (en) | Tuning indication circuit | |
JPS53143145A (en) | On line data processing system with upper rank system monitoring unit | |
JPS5336211A (en) | Level detector | |
JPS52107754A (en) | Trouble detection unit of oscillator |