Discussion on the application of twisted-pair-wire transmitter in wiring

Experience and facts tell us that the advantages of UTP transmission video really enhances our use of twisted-pair video transmitter in the project confidence, but in the actual product purchase and wiring applications, or there will be some problems, to its summary, as follows:

1 in order to enhance the anti-interference ability, use the shielding line

Some friends have long been using coaxial lines for transmission, the use of coaxial cable as a transmission media experience unconsciously applied to twisted-pair transmission, that the use of shielded twisted pair in the anti-interference has a better performance, but in fact, the use of shielding line does enhance some anti-interference ability, but the high-frequency signal seriously damaged, Transmission of the effect of color variation, distance is not even color image, transmission quality greatly compromised. At the same time, shielded twisted pair of high prices, in addition to the cost of the project, so wiring is the first thing to pay attention to this problem.

2 in order to reduce the cost of engineering, blind selection of low-priced products

Any product has its reasonable price, good mobile phone appearance, use smoothly, durable, but the price is not expensive, because of its industrial design, quality control, materials and other aspects of the process have done a lot of work, these jobs are required to input costs, natural price relative to some of the more sophisticated mobile phones higher. At present, China's twisted-pair transmission equipment production enterprises are mostly private small enterprises, more reasonable prices can bring benefits to the user, but also to ensure that the production enterprises have a more stable power, not 3 or 5 years to close the door, the user's own products on hand is not known to find who to repair. Twisted pair transmission equipment is in recent years, the market price is a mess, some friends in the purchase of products first consider the price, after consideration of quality and after-sales service, so put the cart before the horse. It should be clear that we do the project is security engineering, therefore, security engineering of the entire system to the quality of reliable products, otherwise the quality does not pass, the system itself has been a problem, how to monitor the small cat puppy small gestures. All to buy a reliable product, ultra-low price is very difficult to do, if you buy, you may have to consider the quality of the product or after-sales service of the pros and cons. Of course, there are some enterprises in the cost control to do very well, its cost-effective very competitive, but China's current such enterprises are rare, very few.

3 blindly believe that the product's waterproof, anti-interference and lightning protection ability

Most enterprises in the propaganda that their products are waterproof, anti-interference and lightning protection, so communicate with customers in order to allow customers to believe that their products of these capabilities, the wiring should be active around the rain, strong interference and direct lightning strike area of the matter has been dismissed, Customers purchase products will naturally not attach great importance to these should avoid the place, the result may be interference and direct damage to the phenomenon of lightning. Imagine, tens of thousands of volts of thunder can split the big tree into several petals, small twisted pair transmission equipment is what?! The casing will be melted, and the detonator will have a role to play. Therefore, the wiring we must be realistic, try to bypass them, the farther the better, while improving the product storage environment, so that the equipment in a clean, dry environment stable work. More Wonderful content: http://www.bianceng.cn/Network/zhbx/

4 rough wiring process, resulting in poor video effect

In fact, the unshielded twisted pair we buy on the market are 305.1-meter cartons, but the project point left a right one, far near, therefore, less than 305 meters in the short place will need to break open network line of the foreskin, will be picked out to connect the camera, long place need to two boxes or even more boxes of the line to pick up, In the wiring when the best welding, bandaged, and pay attention to twisted stranded wire and the problem, so as to ensure that the transmission does not have problems on the line.

5 Go two extremes, cause unnecessary waste

It is unscientific to use long-distance transmission equipment for short distances, and to use short distance transmission equipment for longer distances. Some friends in order to make the video effect is better, often at the cost of 1200 meters of transmission equipment used in 500 meters, in fact, this big can not, is a waste. Short distance There are more economical products, some do not need power, stability is stronger, very economic, in the energy shortage today, we advocate effective economy. On the contrary, if the normal work in the 300 meters of equipment used in 500 meters, is also unscientific, call a 10-year-old child to pick the burden of 100 kg can be, this can only increase the risk of equipment damage, show the effect is not good.

6 wire is too bad, causing frequent disconnection

Twisted pair of video transmission equipment in most of the wiring to take the two wiring, one is directly in a pair of two lines in the line after the leather sheath respectively received on the equipment of the two columns; one is to use RJ45 crystal Head to connect. Both methods have their advantages and disadvantages, using the way of terminals in contact with better, can ensure good contact between the knot, but the twisted pair of lines, there is no special tool is not easy to deal with, if the quality of the wire, the wire may be very brittle, can not afford to toss; use crystal head to connect, let a person feel very feasible, But the actual effect is not good, because the contact of the crystal head * Elastic oppression, long time may cause bad contact. In addition, the general one point we only use twisted pair of four pairs of lines, if the four pairs of lines are done crystal head, is obviously a waste. Therefore, the best way is still to take the form of terminal, but in the procurement of wire, the good quality, as far as possible to choose brand wire. Some people are worried about wiring in the form of terminals, whether the thin two lines can withstand the weight of the long line itself, this worry is normal, but we have the way to deal with it, as long as the end of the wiring around the whole twisted pair of cable to do a fixed, this worry can be completely solved.

7 research is not deep, lack of patience, failed to adjust the best results

The first use of twisted pair transmission equipment, see a thin sheet of paper instructions that installation is a piece of cake, so a cursory look at the instructions began to start, however, the actual adjustment found far is not the case, the reason is that when the transmitter and receiver must be adjusted, and the location of the transmitter is often outside the MPG, The people on both sides need to be coordinated with the walkie-talkie, this kind of work is easy to be distracted, so the problem is easy to produce, many initial users, it is easy to spread the gas on the twisted pair transmission equipment. The solution to this problem is that the concrete construction personnel must first read through the manual, second, according to the actual estimate of the distance between two points, the first to determine the launch end of the dial code position, and then let the construction staff to carry out appropriate adjustment, if not, the explanation of the estimated error, it is necessary to estimate, in the launch side set good dialing code, By the person at the receiving end to adjust again, so the best effect is easy to tune out. The key is 1, to stress a regulation order, 2, to hold the attitude of research, patience, comprehensive, serious to do once.