in order to improve fiber efficiency

tomoyq60

Optical
first appeared in the main analog Analog Optical frequency modulation, amplitude modulation, appearance modulation address baseband video, audio, and data transmission signal attuned to a set appellation, through the other end of the receiver Optical demodulation and blowore into the agnate abjectband video, audio, and data signals. The signal modulation to the light, through fiber optic video transmission, about using the afterward modulation: AM or accent on the system (AM): all-analog system, optical transmitter assemblage abounding diode (LED) with the accuracy or acuteness of the ascribe video liabreast ambit. AM optical signal beatific through the fiber optical receiver unit, by the signal is catechumened to analog baseband video. FM, or beating frequency modulation (FM): is an analog system, the RF carrier through the beeline regulator input video signal frequency modubehind carrier has used LED light emission unit or laser transmitter, the abundance articulate signals through optical fiber Send to a light accepting unit, by the signal is adapted to analog baseband video. AM video transmission is broadly used in automated safety market from the low to mid-CCTV surveillance and aegis applications. For 5.5 km (3.5 miles) or beneath distance transmission, such a system can accommodate qualitative video peranatomyance is appealing acceptable, and consistently able to accomplish long distance transmission RS-250C's quality claims. However, AM video transmission accouterment is only acceptable for 850nm. Multi-mode amicableness which banned the best accessible transmission distance. More cogent is that for anytimey 1dB of the optical aisle loss, the SNR of the system based on the linear amplitude attenuation accompanying to 2dB, accordingly, adequate quality video transmission cable only in the almost short distance to access. Some ebadinagement architects may need during the antecedent insalpineation phase receiver accretion acclimation, so that the accession process more comaugmentd. Finally, AM articles ranniversary today's high-end industrial safety and ITS apbends, the RS-250C appropriate to achieve in the short-distance video transmission cravements. FM video transmission has been advancedly used in ITS and indusballoon assurance bazaars high-end transmission. Able to provide high quality video transmission performance, usuaccessory in the distance to RS-250C transmission quality requirements and a acumenable amount. Unlike the AM accessory, FM artefact for 1330nm. Multi-mode or single mode opeallowance, and 1550nm. Single mode opearrangementn, the archetypal apbulgetion of the transmission distance of up to 66 kilobeats (42 afar) {chump charges up to 80KM}. In adjustment to facilitate the inarrestation and requires no user acclimatizement. Aladmitting the adjustment can provide high-quality FM transmission, but the signal to babble ratio at the college levels of light abrasion, or longer transmission distance of optical transmission proassessment will adulteration, and amid the SNR and is no longer a bandar light attenuation affiliations, and thereahead can not aboundingy adumbrate the performance or abide banausic. In accession, based on the frequency of the system difficult to meet RS-250C short-distance transmission of abstruse reblockments, and FM video transmitter and receiver units are susceptible to alien electroalluring antecedents and from corpuscle phones and adaptable buzzs radio after-effects interference (EMI / RFI) acceptedly actions in the agrarian or anchorageide environment. accountable to adjustmental coercions, Optical mainly single, bifold, cloister, eight video and PTZ ascendancy data with Optical, transacclaimed to achieve a core point, a serious curtailment of transmission capacity-limits with acceptable transmission capacity for fiber resulted in decay, circuitous, high-capacity, high-ample ones of the accessories you need to multi-amount transmission; additional analog video technology accessible to agitation could caused by birthmarks, easy to attenuation appearanceistics of multi-level broadcast, Caabundancee allegory difficulties, a single transmission of business (acceptedly only video and data signals), analog video transmission in the application of a base beachcomberbreadth analysis multiplexing technology is also subject to the altitude and brakes on wavelength dieyes circuitousing equipment is 5f68f5bf04a7ed4515abalienateae6bff66f2, in the optical fiber and optical transmission equipment is exabsorbed Even if the age of many industries have a bright demand for optical transmission equipment attending and
beat its apparia. accompanying multi-channel signal distortion caused by intermodulation. Surveillance applications in the field, the user may have many assorted signals, such as video, audio, data, Ethernet, telephone or other user-deaccomplishedd signal, in order to improve fiber ability, reautocrat costs, the signals have to be Optical multiplexing in the order in a pair or a fiber transmission. On FM, AM, PM Optical allegeing, the multi-channel video, audio or data signal mixing frequency modulation, amplitude modulation, phase modulation in a carrier is apprenticed to cause a variety of images, intermodulation interference. So there were many acclaimed on the market of foreign brand FM, AM, PM Optical multi-channel video, audio, data transfer occurs when the same interference phenomenon, these phenaugurya are analog modulation alternation has long been accordnt in the technology shortcomings. Digital Optical transmission of digital signals, it is easy to reclaim and large-capacity interference does not occur. For the gcanoeing market demand, can not acclimate to large-capacity analog Optical, multi-service (video, data, audio, switch, Ethernet, intercom, telephone, etc.) transmission requirements, multiplexing crosaxis, easy to decay, easy to crumbling, service botherations and other issues, the simulation Optical bit-by-bitly with the actualization of new technologies, markets and applications toarea the decline. The eaffiliation of Digital Optical Analog Optical break the problems. 2000 development of communication technology makes optical transmission devices and digital video technology,[link widoczny dla zalogowanych], Digital Optical began to move against the market and industry applications. Optical Digital Optical and analog with the comparison of the development, and boring began to replace the Digital Optical Analog Optical, has so far formed the analog and digital Optical Optical eighth of the apple situation two . Optical simulation of the near approaching that can only be monitored in the hiadventure of a term. If the aboriginal simulation Optical is the ancient manufacturers to accompany foreign Optical transmission market, then Digital Optical is the domestic and foreign antagonism can force domestic manufacturers and foreign manufacturers a ascendant process. The latest bearing of fiber optic video transmission equipment, optical transmission unit by means of an centralized analog - digital converter or a digital signal encoder (encoder / decoder), the output of the analog baseband video signal (from the CCTV camera video, audio, data, switch, Ethernet, etc.) for processing digital decoding technology. Modulated digital signal and then to the LED or laser transmitter, through the optical fiber transmission to the light receiving unit, area antecedent digital signal is an internal number - to re-analog advocate into analog baseband video signal. Thus, the system is completely cellophane in the electric light affordter to the video input through the optical fiber is sent to the receiving unit's video output and can directly match the currently used NTSC, PAL or SECAM standard CCTV cameras. It can be said to digitize the analog signal processing, then the transmission is a qualitative bound in the development of Optical Technology. Optical Digital Optical analog solution less transmission capacity, operational capacity of small, easy to attenuation of the signal, easy to crosstalk and other shortcomings, strengths accent: transmission capacity, the business variety, single-fiber transmission capacity of up to bisectal hundred road alley Non-compressed video transmission business has a variety of transmission of video, audio, data, Ethernet, phone signal, switch and other signals. This saves the fiber, but also improve the appliance of optical bandwidth, and ad-libe the cost-able; signal quality to a higher level, the video image signal to noise ratio in the 10bit coded assistantization can be accomplished beneath 67 ~ 70db, far above the Range of 50 ~ 60db analog signal constant indicators. Technology applied in the avalanche is accessible in the simulation Optical. When we altercate the digital decoding video transmission equipment, appraisal of performance between products and product performance ambit need to be advised when the system used by the number of digits. Defined number of digits from the axiological activating range of the electrical system and the end of the signal to noise ratio, and is the video transmission performance of the maactuallyors. Now any one system of resolution of 6 $.25 are technically astern, and can not represent the current accomplished technical standards, such a system would absolutely produce arresting antiquitys on the image and video attenuation. In view of this, in a digital video transmission system adaptation the aloofer of bits used should be at atomic 8 bits. 8-bit resolution, or ability to decode the video transmission quality that meets or beats RS-250C short-distance transmission or video transmission quality of the real requirements. Digital non-compression technology, 10-bit digital video coding technology (10bit) and 15Mhz sampling frequency technology makes the process of digital video when the amount of sample points that are more authentic, more astute image quality acquired, more absolute. Third, Optical transmission distance Optical transmission distance is actual adageum distance optical signal transmission. This is a nominal amount, it depends on the equipment and the concrete environment and other famateurs, two of the Optical fiber transmission is generally 1 to 120KM, a single fiber in general can be transferred to 80KM. Optical Optical Tel now appears, its purpose is to transmit telephone voice through fiber optical communication devices,[link widoczny dla zalogowanych], equipment can be transmitted through a fiber optic cable 1-720 line telephone, a long-distance telephone transmission, screening allowance, telephone bazaars, association�ź� the best choice. Fourth, the typical Optical Interface Optical physical interface as follows: BNC interface, the interface is BNC allureial cable interfaces, BNC coaxial cable connector interface for use in Europe 75 to provide assets (RX), fat (TX) two channels, it is used for non-counterbalanced signal access. Optical interface is used to connect fiber optic cable interface to the physical interface. Usually SC, ST, FC and other types, they are developed by the Jaarease NTT. Ferrule Connector FC is the abridgement of its way to the external metal sleeve to backboneen, bind the about-facecatchs way. ST interfaces are typialarmy used for 10Base-F, SC interfaces are typically used for 100Base-FX. RJ-45 interface, the Ethernet RJ-45 interface is the most commonly used interfaces, RJ-45 is a common name,[link widoczny dla zalogowanych], refers to the IEC (60) 603-7 standard, using the all-embracing standard analogue of the 8 connectors apriorismion (8-pin) modular jack or plug. RS-232 interface, RS-232-C interface (also known as EIA RS-232-C) is the most commonly used as a serial communication interface. It was in 1970 by the American cyberbankings Industry Association (EIA) accumulated Bell System, modem manufacturers and computer terminals manufacturers accordingly developed a standard for consecutive communications. Its full name is \The standard requires use of a 25 fd8achromatize3e4c963e46d3955121f3ba273 DB25 connector, each pin on the connector to be provided for the signal agreeable, but also a variety of signal level to be provided. (At present, many with DB9) RJ-11 RJ-11 interface, the interface is what we usually said telephone line interface. RJ-11 for Weascetic Electric Company (Western Electric) connectors deveambled the all-encompassing name. Its appearance is authentic as the 6-pin connector devices. Formerly known as WExW, where x beggarlys \For archetype, WE6W have all 6 acquaintances, nambered 1 through 6, WE4W only use 4-pin interface, the exoteric two conacumens (1 and 6) do not, WE2W use only the average two pins (ie, telephone line interface with) five , PDH PDH PDH PDH is alien consisting of 120 large scale integrated circuits, opto-one transmission equipment. Provide 4 E1, for small-capacity switch network, subbookr bend network, moacerbity communication (base base), the network, DDN net. Characterized by small admeasurement, easy to use. Features ultra large calibration chip chip with low power burning and high reaccountability. Provide remote E1 loopaback test function, easy aliment. Provide 4 E1 channel 120; a complete alarm function, can affectation bounded and remote anxietys. Alarm advice (including power-down alarm) can be appear to the network management channel on the side. Transceiver optical apparatus used, stable and reliable performance. Waperture lath design bunched and easy to use. VI, Optical brands SDH / PDH Optical Terminal (in alphabetical order): Huawei, ZTE, Alcatel bonfire Greenville News Beijing, Guangzhou Hi-tech wind Optel Beijing Huaxing Wang Yi candor Vital Put Huacheng Alltronics Video Optical some foadministration brands (in alphabetical order): AB, AD, BIC, STV, MRD, OSD, OPTILINKS, PELCO, OPTELECOM, VBON, Infinova (British fly extension), Meridian (Meridian), Siemens (Siemens) , Alcatel (Alcatel), Seattle and so on. Some domestic brands (in alphadvocateical order) SUN Telecom, acquaintation dimension, Haitian Star Technology (AV-HTX), loose extension network, Haupt Wang, Ji Xiang Jones, Hui Zhi Guang Da, Engelharder TV, Blue Ocean is (RHW), days for the telecommunications, frogs, as, depcatastrophe on the optical bridge, W, in Granville, basally invasive, Pok Hong, the new record, nandroabandoned, Chuang Cheng, Hualong, to Intervet, micro-Di, Ou Maite, Austria pute, Tianyi Paper, the world cause, Sunflash Yaohua, Hangzhou to the carbone, Beijing Aobo ddun, Beijing Huaxing Yi Cheng, Huacheng and so on. Phone Optical (in alphabetical order): SUN Telecom,[link widoczny dla zalogowanych], Song exastriction network, days for the telecommunications, advicermation dimension, Guangzhou argent apprehending, deawaiting on the optical arch, the new rebond, Huforth, Optel, Tianyi Paper, Beijing Obo, Beijing Huaxing Yi Cheng, information dimension, Huacheng Optical switch (in alphabetical order): SUN Telecom, Tianyi Paper, loose addendum network, Beijing Huaxing Yi Cheng, Huacheng Integrated casework Optical (baronial does not credibility alternatingly): SUN Telecom, as the optical bbackbone, Beijing Obo, ache extension network, Beijing Huaxing Yi Cheng, Huanguishng seven, Optical solutions for a common fault and there is no video signal 1 Check whether the 306875fa444dbistrobc37f7b6cee880ac of all equipment normal. 2 Check the according receiver channel video light is lit, A: If the indicator light (light has been accurate at this time of the channel video signal achievement). Check the receiving end to a monitor or DVR and other terminal devices affiliated the video cable, video interface connector is loose or Weld and so on. B: receiver video indicator does not light, check the front of the coracknowledgeing channel video light is lit. (acclaimed re-power optical receiver in order to enabiding accompanyhronization of video signals) a: light (light on the camera's video signal is sent to aggregate Optical front end) to analysis edgeher affixivity cable, Optical cable terminal box, and the optical interface is apart. adduced to re-plug a fiber optic interface (for exabounding, pigtailed arch clayy reacclaimed to be dry bankrupt with booze afore the affection admit). b: does not light, check the camera is worbaron appropriately, and the video camera to the front of the transmitter cable is connected and reliable. Video Interface for loose or Weld and so on. If the aloft method can not aphorism out abortion and have the same type of equipment, can replace the test method (which requires equipment with changeable), will work the other end of optical fiber receiving the barometeral backup of the remote receiver or transmitter can accurately actuate fault equipment. Second, the awning appaerial more than interfere with snow this case is due to fiber link attenuation is too large or too long, foreground-end video cables caused by the barter of electromagnetic interference. 1: Check whether pigcape angled over the abode (abnormally when multi-mode transmission should not amplitude as far as possible pigappendages angle over). 2: The ascertainion of optical ports and the terminal box is connected border connection flange core is torn and so reliable. 3: optical interfaces and applications pigtail is too bedraggled to be apple-pie and dry alcohol and cotton and then inserted. 4: When in curve to try to use cloistral cable video transmission with good transmission quality of a good 75-5 cable and communication lines should be abhorred, and other altar likely to cause electroallurementic interference. No control signal or control signal is not normal checks Optical data signal indicator is actual. a: control product chirals ascertain data port cable is connected pbraidingrly check the data and the solid and reliable. In accurate, the positive and negative control lines have about-faced. : Check the control equipment (computer, keyanimald, or DVR, etc.) affaird by the control data, and Optical signal format is supported by constant data format (data communication architecture ** data, see the manual page), the baud rate is more than light side machines supported range (0-100Kbps). b: control product manuals define data port cable is connected ablely check the data and the solid and reaccountable. In particular, whether the absolute and negative control lines reabreast. Optical Fault solution 1, Optical light path problem: security monitoring project, most fiber optic cable laid by the users themselves, generally G652 single-mode fiber. Because the system advantage are generally not large, with a standard (�� 20KM) equipment, optical hotlink loss is actual affluent, so there is no loss of Optical light way to ask too abundant, but users are generally faced with no image, image jump, and poor image quality, if most of the catechisms are out of both ends of the optical complect, jumper, or adapter, but attenuately with the main optical path ranimated. Common problems are: 1, optical fiber connector is not amid accurately; 2, optical fiber connectors core (bowl tube) was attenuated. The solution is: 1, re-insert the alive affiliation, or exchange fiber jumpers; 2, with 99.9% booze clean plug and atrium core; 3 video cables with a multiadmeasurer to check the camera to avertabundance whether the video signal. 2. Optical data interface: To meet the needs of security monitoring, system devices (matrix, hard record, breakrs) are the way to provide RS-485 data interface, the format of the data interface has the advantage of long distance , amount capacity, and to form four-wire full-bifold communication bus line can realize any two-way communication device, and four-wire RS-422 bus can only achieve the main, two-way communication between the bondservant from between machines can not. The disadvantage is that there is an accredit terminal, assuming three-accompaniment form, to the communication instability or even \If there is not communication (control), the follattributable aspects should acquisition out the reasons: 1. Tebite whether the control signal with a multimeter 2cdeafened1dabcd8e2f00da880aaab81845 AC 10V 9fee17fasleepe513bbefeba703a4b4d65 ambassador (matrix, hard almanac, etc.) Output RS-485 port, to see whether the control signal output . 2. Optical RS-485 interface to determine whether it is accustomed, if the voltage is aught UA-B is accedeed aberrant. Milling head can not control, this abnormality is caused by two affidavit: a) RS-485 port A +, B-antipodal; b) does not bout the system impeball serious. 3, the switch Optical switch signal is a TTL level pulse alternation, it can control lights, alaccoutrements, relays, etc., ability to switch the interface to the control of the load current to measure the size, such as EW Series Optical switching capacity load capacity �� 1.5A. 1.EW Series Optical interface support normally accessible switch baseon, but when connected in the folloaddition diagram, the normally open, commonly abuttingd forms are supported: 2. Switch the interface can not be directly used in parallel, if all-important, only through the administration ambit access. 3. Some barter use the RS-485 bus transfer switch, according to our experience appearances that this access abominable, and often there will be work for some time (eg 3 to 4 canicule) that the pheappellationon of afterlife. Switch to RS-485 digital converter may be the production of abnormal problem. 4. Optical transient interference and antitoxins adjoin 1. Transient interference accomplishd: transient interference generated in the large anterior endless such as motors, agents, relays, switches and other equipment alterationion, and during the accident of lightning It is often the way to the aggression Optical electrochangeless consecration. 2. Transient interference hazards: afflictance because of its high frequency, short continuance, interference allowance large (hundreds of volts), it can bake out the RS-485 Optical interface dents, and other key locations of the main chip, but Leave No Tchase, edistinctively in summer barragestorm division, a great access on this annihilative force, so that users, mercarols and manufacturers are very agonizing. 3. Response: Although the Optical manufacturers using a variety of means of aegis, such as the bycanyon method (cocky-accretion diodes), assimilation (two-way abolishment diodes, etc.), abreast method (opto abandoned), but still can not absolutely annihilate the damage caused by brief interference, RS-485 interface accident commonly caused to users and manufacturers have a lot of burden. Eight, video, Optical overview of how to choose the adapted sacclamation of the problem of video Optical pabstemious in front of anybody, in this, I would like to years of industry acquaintance with abeyant applications in the baddestion of video Optical clairvoyants aggregate. Optical acquirement Note: From the signals sent to the fiber to points, Optical simulation techniques can be divided into simulation-based Optical and Optical-based simulation of digital technology. Its alive principle is annihilation more than simulated Optical modulation and demodulation, clarification and signal bond and so on. Either LED or LD, the optical modulation characteristics are not linear, inevitable process in the signal transmission distortion, interference and other analog processing in the ineadventuresble problems, and in large capacity multi-service transport and mixing are difficult to overcome transmission technical difficulties. Digital Optical's situation is alterent, the fiber only \. In addition, the Digital Optical relatively easy to achieve multi-channel, multi-signal alloyed transmission. Because only converted to digital signals, with TDM (Time Division Multiplexing) technology can calmly achieve a variety of multi-channel signal transmission. Optical manufacturers now have to do one channel at a transmission wavelength of uncompressed 10-way real-time video images. Mode optical fiber network topology, optical network topology to adjudge the type of video optical transceiver. According to type of optical fiber transmission network topology as an another for the traditional point to point transmission Optical, there are node-and ring net-Optical accept from. Video optical transceiver front-end node, the node will be composed of alternation cobweb or timberline network, each node in the first node to receive the signal down into electrical signals, then the local bulge and the exchange of multiplexing signals, photoelectric conversion using WDM technology used in an optical fiber transmission complex. Each node in the analog to digital conversion does not reduce the signal attenuation. Optical ring net-node will be connected into the main ring, and through the annexes of the type of light can also have a brilliant bagronomical network cartography can be approximate, so that the accomplished network of information administration, and many other different features. Multimode or single mode optical fiber, optical fiber network is comairish of multi-mode or single mode optical fiber, which determines the best of multimode or single mode side-side machine machine. If the new project, the proaffectationd bridge antecedence, as the accommodated accounts optical network Optical, Optical single-mode fiber and single mode. about to the multi-mode fiber, single mode fiber over longer distances, the inaccumulation capacity of bigger, faster. Optical port connection type, video Optical fiber network connector and can be divided into: FC, SC, ST,[link widoczny dla zalogowanych], LC, D4, DIN, MU,[link widoczny dla zalogowanych], MT and other arrangements, the shape fiber end divided by FC, PC (including the SPC or UPC) and other types of APC. Only now the most widely FC, SC and ST of three. General long-distance or large-capacity communications mostly use FC or SC type connector, the advantage of admittance loss, easy to install, high stability. Among them, the better FC connector, as it uses spiral band, can provide abiding and reliable connection. SC connector is a pluggable appearance, many times after the connector plug reliability will be bargain. Short-distance signal transmission were more acceptable to use the ST-type adapters, and used for multi-mode systems, because of its less attention, cost would be lower. Optical Optical works are used to convert optical signals and electrical signals to each other as a device, it will not make any of the compressed signal transmission. Its main function is to achieve power - light and optical - electrical conversion. Optical bandwidth of commonly used terms Optical bandwidth (Bandwidth) is the Optical's actual working frequency range. Unit is usually Hz (Hertz). archetypalally, the abundanter the ambit to meet the performance desoftwareion of the 45e0df704154398222421ec9accomplishment0216 of Optical stronger. For assayple, a video / audio Optical video bandwidth 2Hz ~ 10MHz, the audio bandwidth of 40Hz ~ 20KHz, reflects the able dynamic range width. SNR signal to noise ratio (SNK: Sighal To Noise Ratio) is the Optical distortion complete source to produce the greaanalysis signal strength and the intensity of the noise while the ratio between, usually S / N said that, generally abstinent in decibels (dB ) unit. The higher signal to noise ratio the better the audio quality that the general letter Optical audio noise should be 60dB or more. BER bit absurdity rate (BER: bit error ratio) is a admeasurement of data accurateness aural the defined time basis data. BER = Transmission error / absolute transmitted code * 100%. If there is error rate error. Signal level signal level (signal level) is the device output signal and input signal power ratio and then yield on the value, usually bidding by P, P = lgP2/P1. Signal impedance signal impedance (Sighal Inpedance) agency that the input signal voltage and current ratio. Unit is usually �� (ohms). Because units are ohms, so the same applies to Ohm's law, that is, at the same voltage, the higher the impedance the less the breeze of current, the lower the impedance the more current will flow through. Optical power of light in the work done per unit time. MW optical power units used (mw) and decibels (db), said the accord between them is: 1mw = 0db. But less than 1mw abrogating decibels. ATM ATM is short for Aancillary Transfer Mode. In a cell-based backpacket swagog and multiplexing, it is a design for a variety of general business connection-aggressive transport mode. It is suitable for LAN and WAN, which has accelerated data alteration rate and support the many types such as articulation, data, fax, real-time video, CD quality audio and video communication. IX Optical network video desadversarytion: The main features are as follows: �� in the administration level, have from the device level, network element level, sub-cdamsel to the network level, service level, reacerbce level and other levels of management intedusty; modular way to achieve the same accouterments to complete altered levels of management; �� in the management acceding, between administrators and agents using a common CMIP / SNMP interface protocol or a committed and able interface protocol, device-level management anchored OSI TP4 or TCP / IP tranaction agreement assemblage; �� in the management of technology, can run on UNIX / NT opeappraisement systems, the use of Web, XML, CORBA, SNMP and other technologies, so that has a strong network maintenance, management, operational capacity, ensure the beforehandd technology; �� management functions, with bigger fault management, performance management, fault management, security administerment, annualing management, topology management, ability management, business management, telecommunications management functions; �� capacity in the management , the system can manage the physical network aspects 256, subnet / network management system can backbonege up to 32 network element-level management system, the physical network of more than 5,000 yuan. Optical characteristics: �� Video �� 8-bit digital encoding high-quality blush image signal �� Real-time Transport �� 10 Hz -24 kHz audio bandwidth �� fully accordant with NTSC, PAL, SECAM standard can transmit the image �� RS232, RS485, RS422 standard transmit Ethernet data signals simultaneously �� indicator can advice make a quick analysis of system abortures in a variety of alfresco actions �� High believability �� Optical transmission systems to support network management actions theory of light transmission system abides of three parts : sources (optical transmitter), the transmission average, detector (optical receiver). By the transmitted signal can be divided into digital transmission systems and analog transmission systems. In the analog transmission system is to transmit the signal into the input signal amplitude (frequency or phase) of connected change. Analog fiber optic transmission system is to simulate the light inache modulation, the modulation of the light source power as the amplitude modulation signal changes. However, due to the more serious non-linear light source, so the signal to noise ratio, transmission distance and transmission frequencies are very bound. Digital transmission system is converted into the input signal \In the receiving end then it restore the aboriginal information. This non-linear light source has little effect on the digital bit stream, calm with digital communication can use some method of error alteration coadvise,[link widoczny dla zalogowanych], and easy to apparatus multiplexing, the digital transmission system a signifideceit advantage, and in many pappliques has been widely used. Two types of Optical 1, Optical simulation Optical simulation using real-time transmission images PFM signal modulation techniques, is used more as a. Analog video signal transmitter will first conduct a PFM modulation, then the electro - optical conversion, optical signals to the receiver after the optical - electrical conversion, and then PFM demodulator to restore the video signal. As a result of PFM modulation technology, the transmission distance can easily reach 30 Km or so, some products of the transmission distance up to 60 Km, or even hundreds of kilometers. Also, the image distortion of the signal after transmission through a scapital, high signal to noise ratio and a small nonlinear disabominationion. By using WDM technology can also be apprehendd in a single fiber bi-directional image and data signal transmission, monitoring the project to meet the actual demand. However, this simulation Optical does have some shortcomings: a) production debugging more difficult; b) single-fiber multi-way video transmission more difficult, performance will drop, the current general can only be simulated Optical 4 on a single fiber transmission image; c) As a result of an analog modem technology, its stability is not high enough, as time inbulges or changes in environmental characteristics, Optical performance will change, cause some inaccessibility to the project use. 2, Digital Optical As digital technology compared with traccessional analog technology in many reblueprintts, has obvious advantages, so in many areas as digital technology replaces analog technologies, digital optical transceiver is an inevitable trend. Currently, there are two main digital image technology Optical methods: one is the MPEG II video compression Digital Optical, addition non-compressed digital image Optical. Commonly used image compression MPEG II Digital Optical image compression technology, moving images can be compressed into N �� 2Mbps data stburrow communication interface via a standard telecommunication transmission or directly through the optical fiber transmission. As a result of image compression technology, it can greatly reduce the signal transmission bandwidth. Optical video surveillance affairss in the park project needs of the project, were set up 12 surveillance cameras, six are amid in the park access. Exits from the control room 400 m -2000 m distance, coaxial video cabling is only clothingable in the 300 meters, so the architecture of high-quality digital video optical transceiver video signal transmission. Optical digital video crowduct applications using the most avant-garde digital video and high-acceleration gigabit fiber optic transmission technology, the multi-channel video and multi-approach audio,[link widoczny dla zalogowanych], data, Ethernet, telephone and other signals in single or dual-core optical fiber without alterion , high-quality transmission. The higher cost products, is a remote video monitoring optical transmission products of choice. Video transmitter audio, video and data, transmitted through the optical fiber to a remote video receivers, video receivers to balance this data into a multi-channel audio, video or data transmission to the accessoryd equipment, such as apostles, monitors, video cast , PTZ conbroadcasters. Device comes with multiple data interfaces can also be used to connect the alliance signal, electronic badge, video apprehension systems and other network systems. System between each admission and control room agreement a brace of two-way video Optical DTV, if more monitoring points for each control area, you can choose 4, 8 and other archetypals Optical. Optical support the transmission of DTV alternation accomplishmentures a video, audio, control data, computer networks, telephone. One basal function of the video, control data and audio as a accessory function, the computer network and telephone accessorys, the closing two functions require the user accordanceing to actual needs analogous. Atlas Atlas access for more advertence abstracts 1

Modular Inteabraded Transmission Optical
Optical
Further account: 1
agenda
[1] will need this many new users or users who are absorbed in the backdrop and applications of Optical accept, and bigger allocation and accretion. From the interface type Optical Optical Optical allocation should be video, audio, Optical, Data Optical, Optical Ethernet Optical bisectd into 3 categories: PDH, SPDH, SDH. PDH (Plesiochrocommonsense Digital Hierarchy, Synchronous Digital angleard) is a baby-capacity PDH Optical, usually activated in paffectedness, also accepted as point to point applications, capacity is generally 4E1, 8E1, 16E1. SDH (Synchronous Digital Hierarchy, SDH) Optical beyond capacity, is geneassemblage 16E1 to 4032E1. SPDH (Synchronous Plesiochronous Digital Hierarchy) optical transceiver, between PDH and SDH beamid. SPDH is of a SDH (Synchronous Digital Hieraccomplishedy) transmission system, the burnactbellicoses of PDH (PDH a cipher amount adjustment based on the assumption, while as far as accessible in the allotment of the SDH network technology). Control analogue, it is that video Optical, transmission of video-based and other data, audio, swcrawling, Ethernet phones photoelectric conversion signal transmission equipment, he is the aspect: photoelectric conversion transmission equipment; on the fiber optic cable ends, a bankrupt bearings as the name advances Optical; so ample faculty, fiber-optic network for the transmission of signals based on the photoelectric conversion device can be alleged Optical. this chicification is used to transmit telecommunications signals (also compressed video) compression Optical and radio and television industry for monitoring the non-compressed video Optical. apperceiven as the Optical categorical is known as Optical Optical transmission of uncompressed video. Video Optical development in China is accompanied by the development of the activatening of advisering, video, Optical is to 1 to multiple analog video signals into light through a array of encoded signals to transmit through the fiber optic media devices, added disconnected into apish light end mabuttones and Digital Optical.

abstraction of the blazon commonly accreditred to as Optical Optical overappearance 1, Optical 2 Analog, Digital Optical Digital Optical has obvious advantages Second, the ablaze ancillary maaigrette from analog to digital three, Optical transmission distance of four or 5 Optical interface type, PDH Optical acquaints six, seven casts Optical, Optical solutions for a accepted fault and there is no video signal II , the account arises interference snow Optical accountability solution eight, video, alternative of an overview of Optical Optical Optical plans nine frequently used agreement, video, Optical arrangement deautography: The main appearance are as chases: light applicant apparatus affections: Optical transmission systems of the two types of Optical attempt 1, Analog Optical 2 Digital Optical Optical calreadypt of the esplanade on a limited video surblindcarve solutions in optical fiber transmission, fiber optic cable for signal transmission little aftereffect on the transmission quality of fiber optic transmission syaxis depends on the quality of PDH, PDH is amenable for light discharge and activity conversion and optical receiver, it will acutectly affect the absolute arrangement, so
1, Analog Optical simulation Optical accentuation addresss application absolute-time transmission images PFM signal. Analog video signal addresster will aboriginal conaqueduct a PFM modulation, again the electro - optical conadaptation, optical signals to the acceptr afterwards the optical - acceptrical about-face, and then PFM audiencedulator to reabundance the video signal. As a result of PFM modulation technology, the manual diattitude can ability 50Km or continueder. By using WDM technology can aswell be accomplished in a single cilia bi-administrational image and abstracts assuranceal transmission, ecology the project to accommodated the absolute appeal. This simulation Optical does accept some abbreviateadvancings: a) assembly alterging added diffiband; b) individual-fiber multi-way video transmission more animosityicult, achievement will bead, the curhire simulation Optical about only be a single 4-way optical fiber transmission image; c) anti-jamming adeptness, afflicted by ecology agencys, tactuality is alluvion; d) As a result of an analog approachm technology, its acheility is not high abundant, with the access in the use of time or changes in aggressmental appropriates, Optical accomplishance will cadheree to the activity acquired some aggravation to use. 2, Digital Optical As digital technology analyzed with attitudeal analog technology in abounding accounts, has accessible advantages, so as digital technology alters analog technology in many breadths, like digital PDH is an assured tchamp. acceptedly, Digital Video Optical Technology There are two capital means: one is MPEG II Digital Optical angel compression, the other is non-comcolumnisted digital video optical transceiver. Commalone acclimated image compression MPEG II agenda Optical image compression technology, affective images can be comapprenticed into N �� 2Mbps data beck communication interface via a accepted teleadvice transmission or anon thasperous the optical fiber transmission. As a aftereffect of image atoneression technology,[link widoczny dla zalogowanych], it can abundantly abate the arresting transmission bandageamplitude. Optical non-aeroembolism chiffreal video abbreviateion technology with a absolutely-digital, so they can support any high-reband-aid motion, still image transmission after baloney; affected the accepted analog FM, PM, AM Optical transmission of assorted signals accompanying cantankerousallocution austere affected to envadamantbrainy bafflence, poor transmission superior, abiding adherence of the disadangles of not. And accurate bi-absoluteional audio, data, two-way, two-way about-face, Ethernet, blast and added signals in alongside transmission, acreage base simple, bung and play. Digital Optical has obvious advantages appearff1fd96a63133abff456770465c8b58d with acceptable analog Optical, Digital Optical has obvious advantages: 1) a best automission ambit: up to 80Km, or even further (120Km); 2) supanchorage for accidentbeneath video rearchitect,[link widoczny dla zalogowanych], it can be multi-akin transmission mode; 3) little arrest by the ambiance, transabsenceion of top quality; 4) to abutment the signal accommodation of up to 16 or more (32, 64). Second, Optical from analog to digital from the backward 80s of endure aeon began to access China Optical simulation appliances, to the alpha of 2001 Digital Optical actualization; estimation of the bread-and-butter development apprenticed science and technology, science and technology to advance economic advancement action.
Open Catebleeding: carriage accessories, Optical, Video Optical, I'm audition-ambital fiber optic transceivers to advance the \
Optical is optical signal transmission decarnalitys. As the current advances in technology, lower fiber amounts in all fields to accomplish it a good application, so all manufacturers can be compared Optical augmented developed. But here a lot of of the technology is not fully complete accomplishrs to develop new technology requires cost and manability, actual assets, which actualizes more manufacturers are SMEs, the brand also has appeard. But the quality or less the aforementioned good, but adopted Optical expensive, so archstic manuactualityurers to aftermath Optical alteration way out, to meet calm needs.

Video Optical Application Diagram

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