JPS5550757A - Signal change-over control device - Google Patents
Signal change-over control deviceInfo
- Publication number
- JPS5550757A JPS5550757A JP12257878A JP12257878A JPS5550757A JP S5550757 A JPS5550757 A JP S5550757A JP 12257878 A JP12257878 A JP 12257878A JP 12257878 A JP12257878 A JP 12257878A JP S5550757 A JPS5550757 A JP S5550757A
- Authority
- JP
- Japan
- Prior art keywords
- station
- circuit
- synchronous signal
- antenna
- repeater
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0079—Receiver details
- H04L7/0083—Receiver details taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
PURPOSE:To use the circuit between the repeater circuit and the grandchild station even when the synchronous signal cannot be received by providing a change-over circuit in which the relay controlled by the synchronous signal from the parent station and the isolator in the repeater station of the multi-direction multiplex radio circuits. CONSTITUTION:The synchronous signal included in the radio wave of the parent station from the antenna 1 is taken out by the filter 7, amplified 8 and controls the relay 9. When the relay 9 receives the synchronous signal, the contacts 17, 18 are connected and when the synchronous signal disappears due to the deterioration in circuit condition such as fading, the contacts 19, 20 are connected. Between the contacts 19 and 20, the isolator 21 is connected, the input signal from the antenna 1 passes, the output signal to the antenna 1 directed to the parent station is checked, whereas the transmission output is supplied to the antenna 2 directed to the grandchild. Even if the transmission synchronous signal from the parent station cannot be received by the repeater station, the circuit between the repeater station and the grandchild station can be used without applying interference to other station because of pull out and the circuit can be employed effectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12257878A JPS5550757A (en) | 1978-10-06 | 1978-10-06 | Signal change-over control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12257878A JPS5550757A (en) | 1978-10-06 | 1978-10-06 | Signal change-over control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5550757A true JPS5550757A (en) | 1980-04-12 |
Family
ID=14839368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12257878A Pending JPS5550757A (en) | 1978-10-06 | 1978-10-06 | Signal change-over control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5550757A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151994A (en) * | 1982-03-02 | 1983-09-09 | Nippon Steel Weld Prod & Eng Co Ltd | Flux cored wire for arc welding |
| JPS61212483A (en) * | 1985-03-19 | 1986-09-20 | Nippon Steel Corp | Production of two phase stainless welding pipe having excellent corrosion resistance |
-
1978
- 1978-10-06 JP JP12257878A patent/JPS5550757A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151994A (en) * | 1982-03-02 | 1983-09-09 | Nippon Steel Weld Prod & Eng Co Ltd | Flux cored wire for arc welding |
| JPH0234716B2 (en) * | 1982-03-02 | 1990-08-06 | Nippon Steel Welding Prod Eng | |
| JPS61212483A (en) * | 1985-03-19 | 1986-09-20 | Nippon Steel Corp | Production of two phase stainless welding pipe having excellent corrosion resistance |
| JPH0333071B2 (en) * | 1985-03-19 | 1991-05-15 | Nippon Steel Corp |
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