Untuk mencapai-transmisi isyarat video jarak jauh pada kabel-pasangan berpintal, penguatan dan pampasan mesti dilakukan. Peralatan penghantaran video pasangan terpiuh-melengkapkan fungsi ini. Selepas menambah sepasang peralatan transceiver video pasangan terpiuh, imej boleh dihantar ke 1 hingga 2km. Jika kaedah geganti digunakan, jarak penghantaran boleh digandakan, dan kualiti imej yang dihantar boleh setanding dengan pemancar optik. Harga peralatan penghantaran video pasangan terpiuh dan pasangan terpiuh adalah sangat murah, bukan sahaja tidak meningkatkan kos sistem, tetapi kosnya jauh lebih rendah daripada kabel sepaksi apabila jarak meningkat. Oleh itu, penggunaan transmisi pasangan terpiuh dalam sistem pemantauan mempunyai kelebihan yang jelas:
1. Jarak penghantaran yang panjang dan kualiti penghantaran yang tinggi.
Due to the advanced processing technology used in the twisted pair transceiver, the attenuation of the video signal amplitude of the twisted pair pair and the attenuation difference between different frequencies are perfectly compensated, and the brightness and color of the original image and the real-time performance are maintained. When the transmission distance reaches 1km or more, the image signal is basically free of distortion. If the relay method is used, the transmission distance will be longer.
2. Pendawaian adalah mudah dan kadar penggunaan kabel adalah tinggi.
A pair of ordinary telephone lines can be used to transmit video signals. In addition, any pair of Category 5 unshielded twisted-pair cables widely laid in buildings can transmit one video signal without additional wiring. Even re-wiring, Category 5 cables are easier than coaxial cables. In addition, there are 4 pairs of twisted pairs in a Category 5 cable. If one pair of wires is used to transmit video signals, the other pairs of wires can also be used to transmit audio signals, control signals, power supply or other signals, improving the cable performance. Utilization rate, while avoiding the trouble caused by the separate wiring of various signals, reducing the engineering cost.
3. Keupayaan anti{1}}gangguan yang kuat.
The twisted pair can effectively suppress common mode interference, and even in a strong interference environment, the twisted pair can transmit excellent image signals. Moreover, several pairs of twisted pairs in one cable are used to transmit different signals respectively, and there will be no interference with each other.
4. Kebolehpercayaan yang tinggi dan mudah digunakan.
Using twisted pair to transmit video signal, a dedicated transmitter should be connected to the front end, and a dedicated receiver should be connected to the control center. This twisted pair transmission equipment is cheap and easy to use. It does not require professional knowledge and does not require much operation. It can be installed once and can work stably for a long time.
The price is cheap and the materials are convenient.
Since the common Category 5 unshielded cables or common telephone lines that are widely used are used, it is easy to purchase and the price is very cheap, which brings great convenience to engineering applications.
