Untuk mencapai transmisi-jarak jauh sinyal video pada kabel pasangan-twisted, amplifikasi dan kompensasi harus dilakukan. Peralatan transmisi video berpasangan-berputar melengkapi fungsi ini. Setelah menambahkan sepasang peralatan transceiver video pasangan bengkok, gambar dapat ditransmisikan hingga 1 hingga 2 km. Jika metode relai digunakan, jarak transmisi dapat digandakan, dan kualitas gambar yang ditransmisikan dapat dibandingkan dengan transceiver optik. Harga peralatan transmisi video twisted pair dan twisted pair sangat murah, tidak hanya tidak meningkatkan biaya sistem, tetapi biayanya jauh lebih rendah daripada kabel koaksial ketika jarak meningkat. Oleh karena itu, penggunaan transmisi twisted pair dalam sistem pemantauan memiliki keuntungan yang jelas:
1. Jarak transmisi yang panjang dan kualitas transmisi 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. Pengkabelan nyaman dan tingkat pemanfaatan kabel 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. Kemampuan anti-interferensi 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. Keandalan 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.
