CN2619420Y - Video frequency light end machine - Google Patents
Video frequency light end machine Download PDFInfo
- Publication number
- CN2619420Y CN2619420Y CNU032235143U CN03223514U CN2619420Y CN 2619420 Y CN2619420 Y CN 2619420Y CN U032235143 U CNU032235143 U CN U032235143U CN 03223514 U CN03223514 U CN 03223514U CN 2619420 Y CN2619420 Y CN 2619420Y
- Authority
- CN
- China
- Prior art keywords
- optical
- amplifier
- video
- circuit
- optical receiver
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a video optical terminal which is used for a technical grade special optical fiber communication network, and comprises an optical transmitter and an optical receiver, wherein the optical transmitter comprises an amplifier, a power amplifier, a modulator, a drive circuit for an optical transmitter and the light transmitter D8 successively connected. The optical receiver comprises an optical receiver D1, a high-frequency amplifier, a feedback amplifier, a video demodulator and a video amplifier. All circuit units are connected successively. The utility model is split into two separate modular structures convenient for usage and maintenance, and can be directly accessed into the existing video digital system, with the advantages of low power consumption, small harmonic distortion, large band width, 60 db of signal to noise ratio and good anti-interference ability. The probation on site proves that the utility model has stable running, 10 to 6 bit error rate and transmission range of over 50 km.
Description
Technical field
The utility model relates to optical fiber communication equipment, specifically is a kind of video optical multiplexer that is used for the technical grade Networks of Fiber Communications.
Background technology
In the general industry transmission system, 4km uses coaxial cable, twisted-pair feeder etc. with interior transmission means more at present, uses coaxial cable, the decay of twisted-pair feeder transmission signals greatly, and transmission range is short, poor anti jamming capability.
Summary of the invention
In view of the prior art above shortcomings, the utility model proposes a kind of video optical multiplexer that is used for technical grade special optic fibre communication network, to satisfy the demand of broadband communication network.
The utility model video optical multiplexer comprises optical sender and optical receiver two parts, and optical sender, optical receiver are an independently modular construction, and the output of optical sender is connected by an optical fiber with the input of optical receiver.
Optical sender contains amplifier (1), power amplifier (2), modulator (3), optical transmitting set drive circuit (4) and optical transmitting set D8 (LD), described amplifier (1), power amplifier (2), modulator (3), optical transmitting set drive circuit (4) connect successively, and optical transmitting set D8 is connected to optical transmitting set drive circuit (4) output loop.Vision signal (VIDEO IN) is amplified by described amplifier (1), (2), modulates through modulator (3), drives optical transmitting set D8 by optical transmitting set drive circuit (4) again and is transformed into the light signal emission.
Optical receiver contains feedback amplifier (6), video demodulator (7) and the video amplifier (8) of optical receiver D1 (LD), high-frequency amplifier (5), compensatory network, described each circuit unit connects successively, be connected to synchronized clamping circuit (9) between feedback amplifier (6) and the video amplifier (8) one inputs, be connected to agc circuit (10) between the video amplifier (8) output and high-frequency amplifier (5) input.The light signal that optical receiver receives is converted to the signal of telecommunication through optical receiver D1, after amplify amplifier (5), (6), sends into demodulator (7) and carries out demodulation, and the signal after the demodulation is output after the video amplifier (8) amplifies.
The optical sender of this video optical multiplexer, optical receiver are an independently modular construction, compact conformation, and input/output end port connects by plug connector, use, easy to maintenance.It is low in energy consumption, and harmonic distortion is little, bandwidth (5HZ-10MHZ), and DG＜5%, DP＜5%, signal to noise ratio are 60dB.
It is stable through on-the-spot probationary certificate for this video optical multiplexer, and the error rate is 10-6, and transmission maximum distance 60km installs and simply can directly insert existing digital video treatment system, product price ratio height.It utilizes, and optical transport technology sends on standard 9/125 single mode fiber cable, receiving video signals, power output-6dB, receiving sensitivity-31dB.
Description of drawings
Fig. 1 is typical light terminal of the present utility model (GF10S2) structure chart;
Fig. 2 is its theory diagram;
Fig. 3 is the embodiment circuit diagram of its optical sender;
Fig. 4 is the embodiment circuit diagram of its optical receiver;
Fig. 5 is that it uses schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
As shown in Figure 1, video optical multiplexer comprises optical sender and optical receiver two parts, optical sender and optical receiver are an independently modular construction, Fig. 1 a, Fig. 1 b are respectively optical transmitter module (GF10S2T) and optical receiver module (GF10S2R), input/output end port adopts plug connector to connect, and greatly facilitates product and installs and uses and safeguard.
With reference to Fig. 2, Fig. 3, its optical sender is made up of amplifier (1), power amplifier (2), modulator (3), optical transmitting set drive circuit (4) and optical transmitting set D8 (LD), described element circuit (1), (2), (3), (4) connect successively, optical transmitting set D8 is connected in optical transmitting set drive circuit (4) output loop, vision signal (VIDEO IN) is amplified by described amplifier (1), (2), modulate through modulator (3), drive optical transmitting set D8 by optical transmitting set drive circuit (4) again and be transformed into the light signal emission.
Among Fig. 3, the amplifier of optical sender (1) is made up of Q3 and peripheral circuit thereof, and power amplifier (2) is made up of integrated operational amplifier U9 (LM6364) and peripheral circuit thereof.Modulator (3) is made up of voltage-controlled multi-frequency generator integrated circuit U4 (MC1658) and peripheral circuit thereof.Optical transmitting set drive circuit (4) is made up of two triode Q1, Q2 and peripheral circuit thereof, and light emission D8, resistance R 3 and luminous tube D2 are serially connected with between triode Q2 emitter and the ground.
With reference to Fig. 2, Fig. 4, its optical receiver contains optical receiver D1 (LD), high-frequency amplifier (5), the feedback amplifier of compensatory network (6), video demodulator (7), the video amplifier (8), synchronized clamping circuit (9) and agc circuit (10), described optical receiver D1, element circuit (5), (6), (7), (8) connect successively, the output of the feedback amplifier (6) of the input tape splicing compensating network of synchronized clamping circuit (9), an input of the output termination video amplifier (8) of synchronized clamping circuit (9), the output of the video amplifier (8) connects video signal output terminal, and agc circuit (10) is connected between the video amplifier (8) output and high-frequency amplifier (5) input.The light signal that receiver receives is converted to the signal of telecommunication through light D1, after amplify amplifier (5), (6), send into demodulator (7) and carry out demodulation, signal after the demodulation is output after the video amplifier (8) amplifies, agc circuit (10) sampled output signal back light receiver D1 carries out automatic gain control, the signal of amplifier (6) output is simultaneously regulated the video amplifier (8) after relatively through synchronized clamping circuit (9), makes the synchronizing signal clamper.
Implement in the circuit diagram 4, the high-frequency amplifier of optical receiver (5) is made up of a high frequency field effect transistor Q1A and two triode Q2A, Q2A ' and peripheral circuit thereof; The feedback amplifier of compensatory network (6) is made up of integrated circuit U7 (CA3127) and U4 (MC10116) and peripheral circuit thereof; Video demodulator (7) is made up of integrated circuit U5 (MC1496) and peripheral circuit thereof, the video amplifier (8) is made up of integrated operational amplifier U6 (AD811) and peripheral circuit thereof, and synchronized clamping circuit (9) is made up of integrated circuit U8 (TL081) and peripheral circuit thereof.
Its course of work is as follows:
In Fig. 3 optical sender, the vision signal (VIDEO IN) of coming from the outside is input to amplifier Q3 input through J1, after the circuit one-level that Q3 forms is amplified, output signal is after the circuit secondary that U9 forms amplifies, after the voltage-controlled multifrequency oscillating circuit of forming via U4 is modulated, deliver to triode Q1, the Q2 drive circuit is transformed into light signal by optical transmitting set D8 and launches.
In Fig. 4 optical receiver, optical receiver D1 receiver, video is after height is put the pipe amplification, vision signal output after CA3127, MC10116 form the compensation of compensating network amplifying circuit also divides two-way, one road incoming video signal compares through TL081, output is regulated Q5 through D10, make synchronizing signal clamper, another road carry out the video amplification and export, and output signal is carried out the control of AGC automatic gain through D12 back light receiver D1 through video amplifier chip AD811.
The use signal of this optical transceiver is with reference to Fig. 5.
Optical sender (GF10S2T) and optical receiver (GF10S2R) can directly insert in the existing CCTV system, and the output of optical sender is connected by a core monomode fiber with the input of optical receiver.The vision signal that transmits from video source (Video source) passes to receiver through transmitter by optical fiber, and outputs to the Monitor demonstration by the VIDEOOUT terminal.
Above-mentioned optical transceiver proves that through field test it is stable, and the error rate is 10-6, and transmission range can reach 50km, and easy to use, installs and simply can directly insert existing digital video treatment system, product price ratio height.This product utilization optical transport technology sends on general standard 9/125 single mode fiber cable, receiving video signals, power output-6dBm, receiving sensitivity-31dBm.
Claims (5)
1, a kind of video optical multiplexer comprises optical sender and optical receiver two parts, it is characterized in that:
Optical sender contains amplifier (1), power amplifier (2), modulator (3), optical transmitting set drive circuit (4) and optical transmitting set D8, described amplifier (1), power amplifier (2), modulator (3), optical transmitting set drive circuit (4) connect successively, and optical transmitting set D8 is connected to optical transmitting set drive circuit (4) output loop;
Optical receiver contains feedback amplifier (6), video demodulator (7) and the video amplifier (8) of optical receiver D1, high-frequency amplifier (5), compensatory network, described each circuit unit connects successively, be connected to synchronized clamping circuit (9) between feedback amplifier (6) and the video amplifier (8) one inputs, be connected to agc circuit (10) between the video amplifier (8) output and high-frequency amplifier (5) input.
2, according to the described video optical multiplexer of claim 1, it is characterized in that: described optical sender, optical receiver are an independently modular construction, and the output of optical sender is connected by an optical fiber with the input of optical receiver.
3, according to the described video optical multiplexer of claim 1, it is characterized in that: the power amplifier of described optical sender (2) adopts integrated operational amplifier LM6364, and modulator (3) adopts integrated circuit MC1658.
4, according to the described video optical multiplexer of claim 1, it is characterized in that: the feedback amplifier of the compensatory network of described optical receiver (6) adopts integrated circuit CA3127 and MC10116.
5, according to the described video optical multiplexer of claim 1, it is characterized in that: the video demodulator of described optical receiver (7) adopts integrated circuit MC1496.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032235143U CN2619420Y (en) | 2003-01-30 | 2003-01-30 | Video frequency light end machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032235143U CN2619420Y (en) | 2003-01-30 | 2003-01-30 | Video frequency light end machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2619420Y true CN2619420Y (en) | 2004-06-02 |
Family
ID=34245463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032235143U Expired - Fee Related CN2619420Y (en) | 2003-01-30 | 2003-01-30 | Video frequency light end machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2619420Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978990A (en) * | 2016-06-20 | 2016-09-28 | 云传电扬科技（北京）有限责任公司 | Real-time communication system and communication method between vehicles based on visible light communication |
-
2003
- 2003-01-30 CN CNU032235143U patent/CN2619420Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978990A (en) * | 2016-06-20 | 2016-09-28 | 云传电扬科技（北京）有限责任公司 | Real-time communication system and communication method between vehicles based on visible light communication |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1025646C (en) | Optical fibre telecommunications line with separate services channels | |
| EP1804400A1 (en) | An optical transmission system and the amplify method | |
| WO2002093758A3 (en) | Apparatus for transporting home networking frame-based communications signals over coaxial cables | |
| CN201699712U (en) | Multi-service switching-on optical transceiver | |
| US20020080439A1 (en) | System for attaching broadband test point within HFC network | |
| CN2619420Y (en) | Video frequency light end machine | |
| CN201699894U (en) | Sixteen-path optical video transmitter and receiver | |
| ES2139942T3 (en) | FIBER / COAXIAL CABLE HYBRID COMMUNICATION SYSTEM FOR VIDEO AND TELEPHONY. | |
| CN105322982A (en) | Differential coupled communication method applied to high-speed power line carrier (H-PLC) system | |
| CN2612160Y (en) | Multi-path video and two-way data optical terminal device | |
| CN1206862C (en) | Remote video frequency image monitoring system | |
| CN2515878Y (en) | Optical transmitter-receiver | |
| CN204559568U (en) | A kind of differential couple communicator of high speed power line carrier system | |
| CN2612158Y (en) | Video and two-way data optical terminal device | |
| EP1235434B1 (en) | Two-way network for distributing catv signals to premises by means of optical fibers | |
| CN2619421Y (en) | Multiple path video light end machine | |
| CN2872748Y (en) | Light terminal machine | |
| CN201699891U (en) | Converging video optical transceiver | |
| CN210491075U (en) | Optical AGC type electric dimming receiver | |
| CN105933683A (en) | Novel video and audio transmission method satisfying long-distance transmission | |
| CN2458823Y (en) | Analog optical fibre transmission apparatus for microwave antenna receiving signal | |
| CN207753721U (en) | A kind of fibre-optical dispersion electronic compensating and flatness compensation circuit | |
| CN201315587Y (en) | Single-fiber three-dimensional module | |
| CN201256432Y (en) | Terrestrial digital television transmission system based on cabled television optical fiber network | |
| CN1284389C (en) | Mobile communication double frequency indoor signal optical fibre distribution system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040602 Termination date: 20120130 |