1、單路雙絞線傳輸器使用說(shuō)明書(shū)( Manual for single stranded twisted pair conveyors )Manual for single stranded twisted pair conveyorsThank you for choosing our products, in order to save your time, make sure you can give full play to the excellent performance of products, to achieve the best results, for the first ti

2、me users, especially the installation debugging personnel, please read this manual and pre simulation test of this product, and then to the on-site installation. First, the basic principles and practical applications: in various monitoring works and video projects, the traditional video transmission

3、 scheme is the use of coaxial cable. But in engineering practice, coaxial cable has many unsatisfactory places, such as high cost, poor anti-interference ability, long and long distance transmission signal attenuation, poor effect and difficult construction of dense wiring.Twisted pair produced five

4、 super twisted pair UTPtwisted pair is what connection the twisted pair transmitter price twisted pair video transmission twisted pair transceiver converter five UTP twisted pair transmission cable twisted pair transmission distance twisted pair transmitter wholesaleThank you for choosing our produc

5、ts, in order to save your time, make sure you can give full play to the excellent performance of products, to achieve the best results, for the first time users, especially the installation debugging personnel, please read this manual and pre simulation test of this product, and then to the on-site

6、installation.First, the basic principles and practical applicationsAmong all kinds of surveillance engineering and video engineering, the traditional video transmission scheme is coaxial cable. But in engineering practice, coaxial cable has many unsatisfactory places, such as high cost, poor anti-in

7、terference ability, long and long distance transmission signal attenuation, poor effect and difficult construction of dense wiring.In view of this, the industry has been studying the use of low prices, anti-interference ability, and easy construction of ordinary network cable, instead of coaxial cab

8、le transmission video signals. After manyresearchers work, developed a variety of special chip twisted pair video signal transmission and application program, and has been quite mature and stable, with the increasingly wide range of applications, the cost is reduced to a very low level. The basic co

9、ncept of using twisted pair to transmit video signals is that:1, using twisted pair instead of video line. Twisted pair is the most common common super five cable, a cable with four twisted pair, any pair can be used to transmit a video signal, a cable with four sets of equipment, can be used to tra

10、nsfer the four video signal. Of course, it can also be any combination of video signals and other weak signals, such as audio, 485 control signals, etc., which can be transmitted in different line pairs of the same cable line.2. Balance / balance converter before and after. Usually, the front end us

11、es passive converters without power supplies to reduce costs. Short distance (300 meters) of the rear end of transmission, can also use the passive converter, but usually adopts an active receiver need power supply, in order to adapt to different transmission distance and improve the anti-interferen

12、ce ability and enhance the reliability and quality of transmission. When the transmission distance is longer (more than 800 meters), the front end will also use an active transmitter to amplify and pre - amplify the signal.3, using transmit and receive dual active transmission scheme, with the stand

13、ard of over five lines, you can transmit video signals up to 1500 meters. Beyond this distance, interference will inevitably be mixed with physical error and transmission cable in the process has accumulated to a certain extent, even if the relay equipment like, can increase a little distance, but t

14、he signal-to-noise ratio is muchlower, the value has not. Therefore, we recommend that the longest distance of twisted pair transmission should not exceed 1500 meters.We twisted the audio and video transmission equipment, using special chip from America, after years of practical use and optimization

15、 design, produced by SMT chip technology, stable and reliable performance, widely used in various engineering environment, as the high quality transmission of audio and video signals.Two 、 installation and debuggingSpecial attention:1, please use unshielded, pure copper core, line diameter 0.5mm, to

16、 achieve five or higher standard twisted pair! The anti-interference property of twisted pair transmission is determined by the balanced transmission characteristic of wire, and the wire is very related to the transmission effect.Transmission within 600 meters, please buy 400 yuan / box above the fi

17、ve types of standards to achieve the network, more than 700 meters, please use 550 yuan / box above the ultra five class standards to achieve the network. 300 yuan brand outrageous super seven lines, even five are not up to standard, mostly semi copper iron, the most basic line diameter and length r

18、equirements and standard difference, with strongly recommended not to use The loss outweighs the gain.2 、 the GNDterminal of twisted pair conveyor is very important to the signal lightning protection and anti-interference, so please connect it to the weak earth wire as much as possible. If there is

19、an empty pair of twisted pair in the cable, connect it to the GND terminal to prevent inter line interference.3. The active receiver ta-305r uses floating circuit, and the power supply must be independent,A power transformer may not be shared with a camera in the same system, but multiple 305r can s

20、hare a transformer. Front end active emitter 305t 12V power that can be shared with the camera.Connect to camera:1, using ta - 201t/r converter with passive BNC head as the front-end transmitter, BNC head directly to the video signal BNC output terminal of the camera, the three terminal behind the t

21、wo side of the V + and V - end connection for the transmission of the video signal twisted pair. In the middle of the GND terminal, the camera circuit is connected to the video signal, which is used to connect the interference voltage induced by the spare twisted pair to the ground. Please connect t

22、he empty, empty line to the GND terminal.2, using TA 202t/r BNC converter with passive head, with appropriate length of a line head is connected to the header of the BNCvideo signal terminal ta-202t/r (end of two terminal attention polarity, V - End Shield network video line) the positive and negati

23、ve two wiring terminal connected to the camera or other video output signal. Then, connect the ta-202t/r ends of the twisted pair ends (one end of the three bit terminals) to the V + and V ends of the two pair of twisted pair pairs for transmitting the video signals. The middle end of the GND,ditto,

24、 is also used to connect the remaining unused twisted pairs.3, the two types of passive converter internal circuit and performance are the same, the actual project, according to the needs of field installation, select the appropriate model. They have to balance / non equilibrium conversion function,

25、 can be used as a transmitter can also be used as the receiver, when using the camera with balanced output port, does not require the transmitter, directly to the twisted pair is connected with the output end can be balanced. Note that the cable is resistant to bending, and the converter and the cab

26、le itself must be fixed and fixed.4, when selecting a dual active transmitter, the front end launcher uses the active emitter ta - 305t. The video signal source is connected to the video in terminal using a two head BNC head video line, which will be used to transmit video UTP to the two terminals o

27、f the video out for ta-305t access, and to be tightened without special attention to polarity. The power supply of AC or DC 12V is connected to the two terminal ac/dc 12V on the left of ta-305t, and the power of the camera can be shared. At this time, the red light is on, indicating that the power s

28、upply is normal, and the green light is bright, indicating that the video signal input is normal. The GND terminal in the middle, above is also used to short the useless on the line. The connection is normal, ta-305t will be on the third distance selection switch to the standby position 1500 m.5, th

29、e connection of the twisted pair, we should pay attention to distinguish the twisted pair line, but do not have to pay special attention to the back-end polarity, if no image or image distortion, can not appear normal image, can be directly connected at the rear end of a change of positive and negat

30、ive twisted pair.Connect to post level device such as monitor:1, short transmission distance (300 meters), the electromagnetic environment is good, can use double passive transmission scheme, the passive receivers, any available above two kinds of passive converter A, the connection is the same. If

31、no image or serious distortion is not formed, replace the twisted pair with a polar connection. Because the passive equipment has no amplifying circuit, the signal loss in the transmission process depends on the equipment in the rear. So the brightness, contrast, color, etc. of the image should be a

32、djusted on the DVR host or monitor. Because the cables and electromagnetic interference and other reasons, if the image brightness is not enough, no color, after class equipment after the adjustment is still not ideal, or the presence of interference pattern and through the ground treatment still ca

33、n not eliminate, please use the active receiver ta-305r.2, the active receiver ta-305r connection: first the power supply, video output (video out) received monitor or DVR, the corresponding twisted pair into the receiver ta-305r "video in" two terminals. Red and green lights should be lit

34、, meaning the same as above. The image should be visible at this point. If no image or image is distorted or distorted, please switch the two twisted pairs on the receiver to the polarity.3, adjust the receiver VR1to appropriate brightness while the image will not be distorted, and will not appear w

35、hite noise and interference pattern. Adjust VR2, makes the image of natural colors, bright and clear color but not trailing, ghosting, noise, interference pattern etc. Two with fine adjustment several times can be up to the best effect.4, the use of dual active transmission program: according to the

36、 circumstances, try to transmitter ta-305 t distance switch in the appropriate gear after fine-tuning ta-305r.5, as mentioned above, all null and void twisted pair pairs should be connected to the GND terminal, and all the GND terminals of the receiver shall be connected together, and then connected

37、 to the weak earth dedicated ground wire of the engine room.Number of more projects, can choose multiple receiver ta-3016 r to simplify and beautify the room equipment installation.6, the replacement of cameras or cables, the use of lines and so on, may need to re adjust the above, before it can rea

38、ch the best results.7, fine tuning potentiometer VR1 role: adjust the entire receiver in the total gain, clockwise adjustment is increased, the image will be more bright. The role of VR2: adjust the receiver's high frequency compensation, clockwise adjustment is to increase the amount of compens

39、ation, the image color is more concentrated, higher sharpness. The longer the transmission distance, the greater the two gain. Two of the regulation on the whole image effect is important, must be careful while slowly contrast adjustment, experienced technical staff, with over five types of wire tra

40、nsmission scheme using single active, will be transferred to the image through the transmission of 600-900 meters, almost naked eye can not see the difference degree.Three, matters needing attention and common problems1, the image will sometimes lose: general is due to the contact point in the line

41、caused by the bad contact, please check the connection is tightened, BNC head to the pure copper qualityproduct, twisted pair connected to electric iron welding is good after sealing treatment. Another is to use infrared gun night occasionally no signal, please check whether the power supply lock en

42、ough capacity, while debugging in the evening lamp is lightened, and the gain of the receiver appropriately, then in DVR software will adjust brightness color.2, in order to make full use of cable in engineering practice can be near signal connected to the sameposition after a short video converter

43、access cable with a cable line; also can through various monitoring points, has broken connection of each signal source, pay attention to the rest of line of useless truncation also belong to the empty lines, to the GNDreceiving end. A cable can transmit four channels of video at the same time, or a

44、ny combination of video and other low voltage signals, such as audio, control signals, etc. The cable length is not enough to adopt a variety of ways to ensure that the connection, but the connection is reliable, with good after welding solder dressing and waterproof processing, not directly togethe

45、r with the best connection, midway in a unified place, and with the wiring box placed to facilitate maintenance. Because the cable connected to destroy the balance of the characteristics of twisted pair, so it should minimize the number of connections, for example, do not use each section of the lin

46、e of 20 meters, 20 meters to 400 segment into use. The standard normal feeder cable FCL, 5-6 access points within 1500 meters, as long as the selection of suitable equipment, is can be satisfied with the results of the transmission.3, denim interference is the same: General Cable in four on twisted

47、pair in empty is useless because of the line, causing the crosstalk, please in front and rear will empty the twisted pair of useless to the GNDside, and at the back of weak ground received special.4, debugging, it is best to monitor the effect of direct viewing. If after segmentation and other equip

48、ment, the internal AGC circuit function, will cause the adjustment potentiometer in a long stroke image not change phenomenon, this time can be a middle position potentiometer in this period of no change in travel.5, image ghosting: usually due to line especially the connection cable, there is a line of local signal reflection caused by the active receptor VR2or improper regulation of high frequency gain caused by too much,