JPH0423626A - Monitor circuit for optical repeater - Google Patents
Monitor circuit for optical repeaterInfo
- Publication number
- JPH0423626A JPH0423626A JP2129579A JP12957990A JPH0423626A JP H0423626 A JPH0423626 A JP H0423626A JP 2129579 A JP2129579 A JP 2129579A JP 12957990 A JP12957990 A JP 12957990A JP H0423626 A JPH0423626 A JP H0423626A
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- circuit
- photocoupler
- transmission
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
Landscapes
- Optical Communication System (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は光中継器の監視回路に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a monitoring circuit for an optical repeater.
第２図は従来の光中継器の監視回路の一例のブロック図
である。FIG. 2 is a block diagram of an example of a conventional optical repeater monitoring circuit.
上り中継器において、伝送信号ＩＵは帯域通過フィルタ
２Ｕにより制御信号成分が抽出され、増幅器３Ｕで増幅
後、バッファ回路９Ｕ及び下り中継器のバッファ回路９
Ｄへ制御信号を伝達する。In the uplink repeater, the control signal component of the transmission signal IU is extracted by the bandpass filter 2U, and after being amplified by the amplifier 3U, it is sent to the buffer circuit 9U and the buffer circuit 9 of the downlink repeater.
A control signal is transmitted to D.
同様にバッファ回路９Ｕでは下り中継器からの制御信号
１１Ｄにより中継器制御信号１１Ｕを受け、更に識別回
路４Ｕを通した後、復号回路６Ｕて制御信号をデコード
し、各種監視動作を行う。Similarly, the buffer circuit 9U receives a repeater control signal 11U based on the control signal 11D from the downlink repeater, and after passing through the identification circuit 4U, the decoding circuit 6U decodes the control signal and performs various monitoring operations.
このように、上り・下りの中継器間で制御信号の授受を
行っており上り、下り回線いずれからでも上り・下りの
中継器を制御可能となっている。In this way, control signals are exchanged between the uplink and downlink repeaters, and the uplink and downlink repeaters can be controlled from either the uplink or downlink.
又、制御信号の授受において、−船釣に上り・下りの中
継器は直列給電により基準電位が異なるため蓄電器１０
を介して行なわれる。In addition, when transmitting and receiving control signals, since the reference potential of the upstream and downstream repeaters differs due to series power supply, the power storage 10
It is done through.
この従来の光中継器の監視回路は、制御信号を伝送信号
に重畳して伝送されるので、信号対雑音比（ＳＮＲ）が
悪＜、ＳＮＲの悪い箇所で、上り・下り制御信号の授受
を行っている為、ＳＮＲが更に劣化するとともに、復調
回路への入力点でのレベルダイヤ及びＤＣレベルを上り
・下りの制御信号について同じになるよう調整する必要
がある。This conventional optical repeater monitoring circuit superimposes the control signal on the transmission signal and transmits it, so the signal-to-noise ratio (SNR) is poor. As a result, the SNR deteriorates further, and it is necessary to adjust the level diagram and DC level at the input point to the demodulation circuit so that they are the same for upstream and downstream control signals.
本発明の光中継器の監視回路は、上りと下りの光中継器
間で伝送信号から抽出した監視用の制御信号を授受する
光中継器において、前記制御信号の授受をフォトカプラ
により行うことを特徴としている。In the optical repeater monitoring circuit of the present invention, in an optical repeater that sends and receives a monitoring control signal extracted from a transmission signal between uplink and downlink optical repeaters, the control signal is sent and received by a photocoupler. It is a feature.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
上りと下りの中継器において、伝送信号は帯域通過フィ
ルタ２により制御信号成分が抽出され、増幅器３で増幅
後、バッファ回路５及びフォトカブラ駆動回路７に出力
する。フォトカプラ駆動回路７により駆動されたフォト
カプラ８は制御信号を対向する中継器のバッファ回路５
にそれぞれ出力する。バッファ回路５からの制御信号は
復号回路６により復号され、各種の監視動作に使用され
る。In the uplink and downlink repeaters, a control signal component of the transmission signal is extracted by a bandpass filter 2, amplified by an amplifier 3, and then output to a buffer circuit 5 and a photocoupler drive circuit 7. The photocoupler 8 driven by the photocoupler drive circuit 7 sends the control signal to the buffer circuit 5 of the opposing repeater.
Output each. The control signal from the buffer circuit 5 is decoded by the decoding circuit 6 and used for various monitoring operations.
このようにすると、本実施例は上りと下りの中継器間で
、制御信号の授受をフォトカプラ駆動回路７とフォトカ
プラ８とで行うので、識別再生後の信号、即ちＳＮＲの
良い信号で授受を行い、信号授受によるＳＮＲ劣化を減
少させることができる。また、上り・下りの回線がらの
制御信号のレベルダイヤ、ＤＣレベルも厳密な調整が不
要となる。By doing this, in this embodiment, control signals are exchanged between the upstream and downstream repeaters by the photocoupler drive circuit 7 and the photocoupler 8, so the signals after identification and reproduction, that is, signals with a good SNR, are exchanged. This makes it possible to reduce SNR deterioration due to signal exchange. Further, there is no need to strictly adjust the level diagram and DC level of control signals for uplink and downlink lines.
以上説明したように本発明は、対向する光中継器間で制
御信号の授受機能をフォトカプラを介して行うことによ
り、ＳＮＲのよい制御信号により監視動作を行うことが
できるという効果がある。As described above, the present invention has the effect that monitoring operations can be performed using control signals with a good SNR by performing the function of transmitting and receiving control signals between opposing optical repeaters via photocouplers.
第１図は本発明の一実施例のブロック図、第２図は従来
の光中継器の監視回路の一例のブロック図である。
１・・・伝送信号、２・・・帯域通過フィルタ、３・・
・増幅器、４・・・識別回路、５・・・バッファ回路、
６・・・複合回路、７・・・フォトカブラ駆動回路、８
・・・フォトカプラ。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of an example of a conventional optical repeater monitoring circuit. 1...Transmission signal, 2...Band pass filter, 3...
・Amplifier, 4...Identification circuit, 5...Buffer circuit,
6... Composite circuit, 7... Photo coupler drive circuit, 8
···Photo coupler.
Claims (1)
の制御信号を授受する光中継器において、前記制御信号
の授受をフォトカプラにより行うことを特徴とする光中
継器の監視回路。1. An optical repeater monitoring circuit that sends and receives monitoring control signals extracted from transmission signals between uplink and downlink optical repeaters, characterized in that the control signals are sent and received using photocouplers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129579A JPH0423626A (en) | 1990-05-18 | 1990-05-18 | Monitor circuit for optical repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129579A JPH0423626A (en) | 1990-05-18 | 1990-05-18 | Monitor circuit for optical repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423626A true JPH0423626A (en) | 1992-01-28 |
Family
ID=15012952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2129579A Pending JPH0423626A (en) | 1990-05-18 | 1990-05-18 | Monitor circuit for optical repeater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423626A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8576484B2 (en) | 2010-09-02 | 2013-11-05 | Sony Corporation | Display apparatus |
| US8692946B2 (en) | 2010-09-02 | 2014-04-08 | Sony Corporation | Display apparatus |
-
1990
- 1990-05-18 JP JP2129579A patent/JPH0423626A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8576484B2 (en) | 2010-09-02 | 2013-11-05 | Sony Corporation | Display apparatus |
| US8692946B2 (en) | 2010-09-02 | 2014-04-08 | Sony Corporation | Display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS62114340A (en) | Bidirectional optical communication equipment | |
| JPH0423626A (en) | Monitor circuit for optical repeater | |
| JP3433388B2 (en) | Optical communication system control method | |
| JPH05153025A (en) | Digital mobile radio set | |
| JPH0423628A (en) | Optical repeater | |
| JPH08195695A (en) | Transmitter-receiver with shared antenna | |
| JPH0129453B2 (en) | ||
| CN115941048A (en) | Optical transmission amplifying device and method | |
| JPH04160824A (en) | System for monitoring optical repeater | |
| JPS59225636A (en) | Subscriber line multiplex transmitter | |
| JPS6155293B2 (en) | ||
| NO20002086L (en) | Calibration of subscriber terminal for wireless telecommunication system | |
| SU1128402A1 (en) | Device for two-way transmitting of information | |
| KR0113221Y1 (en) | Modem transceiving circuit | |
| JPH0488734A (en) | Two-way optical fiber transmission system | |
| JPH0481907B2 (en) | ||
| JPH03259633A (en) | Noise reduction system for transmission system utilizing telephone line | |
| JPH01191536A (en) | Optical reproduction repeater | |
| DK0638886T3 (en) | Method for transmitting a message between two subscriber stations and device for performing method | |
| JPH06104798A (en) | Bidirectional repeater with remote control signal | |
| JPH0334733A (en) | Automatic optical output control system | |
| JPH065233U (en) | Bidirectional repeater | |
| JPH04156119A (en) | Optical space propagation communication equipment | |
| JPS60165838A (en) | Simultaneous two-way voice communication equipment | |
| JPH07321690A (en) | Radio communication equipment |