同軸電纜抗干擾能力好，傳輸數據穩定，且價格實惠，因而被廣泛使用欢迎www.xbaixing.com。那麼綜合佈線時如何選用同軸電纜?
選用同軸電纜時，應考慮信號在同軸電纜內傳輸時，其受到的衰減與傳輸距離和信號本身頻率的關係vTb。通常，信號頻率越高，衰減越大，因此同軸電纜只適合近距離傳輸圖像的信號原文www.xbaixing.com。
但在實際工程中，若想延長同軸電纜的傳輸距離，可使用同軸放大器，透過均衡調整對不同頻率成分分別進行不同大小補償，盡可能減少接收端輸出視頻信號的失真問題xbaixing.com。但同軸放大器不是無限制級聯，每個點到點系統中同軸放大器最多只能級聯2到3個x.b.a.i.x.i.n.g.c.o.m。
因此，在監控系統中使用同軸電纜時，盡量在傳輸距離範圍限制400-500米，確保圖像質量良好xbaixing.com。
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How to choose coaxial cable for comprehensive wiring?
When selecting a coaxial cable, the relationship between the attenuation of the signal and the transmission distance and the frequency of the signal should be considered when the signal is transmitted in the coaxial cable. Generally, the higher the signal frequency, the greater the attenuation, so coaxial cables are only suitable for transmitting signals over short distances.
However, in actual engineering, if you want to extend the transmission distance of a coaxial cable, you can use a coaxial amplifier to compensate different frequency components with different sizes through equalization adjustment to minimize the distortion of the output video signal at the receiving end. However, coaxial amplifiers are not cascaded indefinitely. Each point-to-point system can only cascade up to two or three coaxial amplifiers.
Therefore, when using coaxial cables in monitoring systems, try to limit the transmission distance to 400-500 meters to ensure good image quality.
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