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单路双绞线传输器使用说明书单路双绞线传输器使用说明书 Single channel double stranded wire transporter USES instruction manual Thank you choose our products, in order to save you time, make sure that you can give full play to the excellent properties of products, achieve the best effect, for the fi...

单路双绞线传输器使用说明书
单路双绞线传输器使用说明 关于书的成语关于读书的排比句社区图书漂流公约怎么写关于读书的小报汉书pdf Single channel double stranded wire transporter USES instruction manual Thank you choose our products, in order to save you time, make sure that you can give full play to the excellent properties of products, achieve the best effect, for the first time users, especially the installation personnel, please read through this manual, and simulation test of the company products in advance to the on-site installation. One, the basic principle and practical application: in the various monitoring engineering, the video project, the traditional video transmission scheme is using coaxial cable. Coaxial cable, but in the engineering practice, there is high cost, poor anti-interference ability, in the long distance transmission signal attenuation effect not beautiful, dense wiring construction difficulties and so on many unsatisfactory place. Twisted-pair cable production Five kinds of twisted pair What is a twisted pair twisted pair connection Twisted-pair transmission price quotation twisted pair video transmitter Twisted-pair converter transceiver Five kinds of twisted-pair twisted-pair transmission cable twisted pair transmission distance twisted-pair transmitter wholesale Thank you choose our products, in order to save you time, make sure that you can give full play to the excellent properties of products, achieve the best effect, for the first time users, especially the installation personnel, please read through this manual, and simulation test of the company products in advance to the on-site installation. First, basic principle and practical application In all kinds of monitoring engineering, video engineering, the traditional video transmission scheme is using coaxial cable. Coaxial cable, but in the engineering practice, there is high cost, poor anti-interference ability, in the long distance transmission signal attenuation effect not beautiful, dense wiring construction difficulties and so on many unsatisfactory place. In the light of this, the industry has been studying the use of cheap, anti-jamming, and convenient construction of ordinary network lines, instead of coaxial cable transmission of video signals. Through the efforts of the national scientific research personnel, developed a variety of special chip twisted-pair transmission of video signal and application solutions, and has set up a fairly mature and stable, with the increasingly extensive application, cost also fell to a fairly low level. The basic idea of using a double stranded wire to transmit the video signal is: Use double stranded wire instead of video. Is one of the most common twisted-pair cable is common super five kind of cables, a cable with four pairs of twisted pair, any pair can be used to transmit a video signal, a network with four sets of equipment, which can be used to transport four video signals. And, of course, can also be a video signals and other weak current signal such as audio, 485 control signals, any combination, together in the same line of different lines for transmission. Add a balanced/unbalanced converter to the front and back. Usually the front end USES a passive convertor with no power source to reduce costs. Short (300 meters) transmission, the back-end can also use passive converter, but usually active receivers, and need the power supply used to adapt to the different transmission distance, improve the quality of reliability and transmission, anti-interference ability. The transmission distance is longer (800 meters above), the front end also USES the active emitter, amplifies and preaccentuates the signal. Using emission and receiving dual-source transmission, the video signal can be transferred to 1500m. After more than the distance, the cable will inevitably in the process of physical transmission error and mixed with interference has been accumulated to a certain extent, even join the relay equipment, such as can increase a little distance, but smaller SNR, has little value. So we suggest that the maximum distance between the double stranded wires should not exceed 1, 500 meters. Our sound, video twisted-pair transmission equipment, USES the original special chip, after many years of practical use and optimization design of the SMT process, stable and reliable performance, widely used in various engineering conditions, is used as the sound, the high quality of the video signal transmission. Installation and debugging Special note: Please use non-shielding, pure copper wire core, line size 0.5 mm, reach five classes or higher standard double stranded wire! The anti-interference properties of double stranded wires are determined by the balance transmission characteristics of cable cables, and the linear and transmission effects are very strong. Within 600 metres of transmission, buy more than 400 yuan/box of 5 kinds of standard Ethernet cable, more than 700 meters, please use the more than 550 yuan/box of 5 kinds of standard Ethernet cable. 300 yuan mark card super seven types of cable, even short of five kinds of standards, mostly in the form of copper and iron, the most basic of wire diameter and length requirements and national standard gap is very big, with do more harm than good, it is strongly recommended that do not use. The GND end of the double stranded wire transporter is important for signal protection and anti-disturbance. Please try to connect it with the special ground wire. If there is no unused double stranded wire in the cable, you also need to get it to the GND to prevent interference between lines. The source receiver ta-305r, the floating circuit, the power supply must be independent, You can't share a power transformer with a camera in the same system, but multiple 305r can share a transformer. The front-end active emitter 305t 12v power source can be Shared with the camera. Connect to the camera: 1, using passive converter of the BNC head ta - 201 - t/r as a front-end launchers, set the BNC head directly to the camera BNC output video signal, the back of the three terminals, the v + and v - of two sides are connected for transmission of twisted pair video signal. In the middle of the GND end, the camera is connected to the camera video, which is used for the short supply of the interference voltage induced by the unused double-stranded wires. Please connect the unused lines to the GND. 2, using passive converter without BNC head ta - 202 - t/r, with proper length of a head is BNC cable, will the video signal end of ta - 202 - t/r (two terminals, pay attention to the polarity, v - termination shielding network video line) of the positive and negative two terminals, connect to the camera or other video output signal. It then connects the two sides of the two sides of the ta-202t/r double stranded wire (one end of the three terminals), and the v-end connection is used to transmit the double stranded pair of the video signal. In the middle, the GND end is also used to pick up the remaining useless double stranded wires. The internal circuit and the performance of the two passive converters are the same, and the project should choose the suitable model according to the requirement of the on-site installation. They have the effect of balance/non equilibrium conversion, both can be used as a launch also can be used as a reception, when using the camera with balanced output port, is not to need to launchers, twisted-pair cable to access directly to the equilibrium output can be. Note that the line is unbending, and the converter and the network line itself must be fixed. When selecting a dual-active transmitter, the front-end emitter USES the active emitter ta-305t. BNC video of the head with two belt line, will be connected to a video in the video signal source, will be used to transmit video of twisted pair of ta - 305 - t access to the two terminals and screw down the video out, do not need to pay special attention to the polarity. Set up ac or dc 12 v power supply to the left of the ta - 305 - t two terminals on the ac/dc 12 v, can share the power of the camera, the red lights, said power supply is normal, green lights, said video signal input is normal. The middle GND terminal is also used for short, useless empty lines. When the above connection is normal, select the three-gear range on the ta-305t and set the switch to 1500 m. 5, the twisted pair connection, should pay attention to distinguish the twisted pair line on, but don't have to pay special attention to the polarity, to the back end if there is no image or distorted image, basic normal image, cannot appear directly on the back end of a change of twisted pair of plus or minus connection. Connect to the monitor and other post-level devices: 1, the transmission distance is short (300 meters), the electromagnetic environment is good, can choose two passive transmission scheme, this time using passive receiver, can use the above two kinds of passive any converter, the connection is the same. If there is no image or severe distortion, switch the double stranded pole. Because the passive device does not magnify the circuit, the signal loss that must exist in the transmission process should be adjusted by the equipment in the back. So the brightness of the image, contrast, color and so on will be adjusted on the DVR host or monitor. Due to cable and electromagnetic interference, if the image brightness is not enough, no color, after the equipment after regulation is still not ideal, or still cannot eliminate interference lines and ground treatment, please switch to active receiver ta - 305 r. 2, active receiver ta - 305 - r shuttle: first the power connected and the video output (video out) to monitor or DVR, the corresponding twisted-pair cable connected to the receiver of ta - 305 - r "video" in the two terminals. Red and green indicator lights should be lighted, meaning the same. At this point, you should see the image. If there is no image or image that is badly distorted, please install the two double stranded wires in the receiver. Adjust the vr1 of the receiver, and the image is not distorted, anti-white, and no noise and interference lines. Adjust the vr2 again, make the image color natural, bright and clear but do not appear the color to drag the tail, double shadow, noise, interference grain etc. The combination of the two can reach the best effect several times. Using a dual-active transmission solution: the ability to try to switch the transmitter ta-305 t's distance switch to the appropriate gear will be fine-tuned to the ta-305r after the appropriate gear. 5, as aforesaid, all useless twisted-pair to empty, all want to connect to the GND terminal, at the same time all the GND terminal of the receiver, are connected together, and then room special weak current ground connection. For more traffic, choose multiplexing receiver ta-3016 r to simplify and beautify the installation of machine room equipment. In case of a change of camera or cable, and the use of the line for a long time, the adjustment may need to be redone before the best effect can be achieved. Fine tuning potentiometer vr1: adjust the total gain of the whole receiver, adjust clockwise to increase, and the image will be brighter. Vr2's effect: adjust the frequency of the receiver's high frequency compensation, adjust clockwise to increase the compensation amount, the image color is more intense and the sharpness is higher. The longer the transmission, the greater the two gains. The regulation of the vital effect on the overall image, must be careful contrast while slowly adjust, experienced technical staff, can make use of a single active transmission scheme with super five kind of cables, the image transferred to the after 600-900 meters of transmission, almost naked eye can not see other degree on business. Attention issues and common problems 1, the image is sometimes lost: general is due to the line of each contact point in poor contact, please check all terminals are tight, BNC head to use pure copper quality, twisted pair of barge it'll use electric welding is good after bandaging waterproof seal processing. Another case is to use infrared gun sometimes no signal in the evening, please check whether the power of the bolt is enough capacity, at the same time in the evening lamp light after debugging, and the gain of the receiver up, appropriate to dispatch brightness color small in the DVR software. In order to make full use of the cable, the nearby signal can be connected to the same location by a small segment of video wire, and then it is connected to the wire by the converter. Can also be a cable through the monitory point, break connect the signal source, pay attention to the rest of the line after truncation to also belong to useless empty lines, to the GND terminal. A network line can transmit both video at the same time, or video and other low-voltage signals such as audio and control signals. Cable length is not enough when the connection can be used in a variety of ways, but make sure that the connection is reliable, suggest doing it in a good soldering welding after bandaging and waterproof processing, do not twist together directly, midway wiring best unified in one place, and match box placed for easy maintenance. Due to destroy the balance of the twisted-pair cables tubing features, therefore, should try to reduce the number of connection points, such as absolute don't use every line of 20 meters, 20 Duan Liancheng 400 meters to use. The normal connection of the entire box line of the standard, 5 to 6 contact points within 1, 500 meters, can be fully satisfied by selecting the right equipment. 3, a diagonal shape interference: general is due to the same in the four pairs of twisted pair in the cable has an empty pair of useless, caused the crosstalk between the line, please in front and back end will empty useless twisted-pair received GND terminal, and the back-end received special weak current on the ground. The best way to debug is to use the monitor directly to see the effect. If after segmentation equipment, such as the interior of the role of the agc circuit, will cause to adjust potentiometer on quite a journey in the phenomenon of image basic no change, the potentiometer can be tuned in the middle of the period of the basic no change of this trip. 5, image ghosting: usually due to line of cable joint, in particular, there are lines of local signals caused by reflections, or active caused by improper vr2 adjust the high frequency gain of the receiver is too large, please check, adjust. Twisted pair video transmission only supports point-to-point connections, middle can't doubling after switch devices, such as twisted pair video signal need is divided into two sides receive, please use the special twisted pair video signal distributor ta - 203. 6, lightning protection: the device's built-in multi-stage lightning protection circuit can provide a good surge protection, but still avoid outdoor overhead in construction, high leakage or construction way, being struck by lightning in the minefield have a higher risk of installation, need professional signal arrester and have qualified substationgrounding grip. The transmission of audio is lower than the video signal, which can be compared to the above video transmission scheme. Double stranded wire transfer control signals do not need to be equipped with the other equipment, direct use of the line of spare to be able, will not cause interference to the video signal. The transmission distance is related to cable material, code converter, decoder, etc., please consult the professional manufacturer. Based on reliability and security considerations, we do not approve of dual stranded power supply, including low voltage source. For more technical support, please contact your suppliers. No user can repair parts inside the device, please do not open the shell and tear off the label, otherwise the warranty will not be maintained. The free guarantee is a year for failure. We will send out the equipment that will be properly used on the day of receipt of the failure machine.
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