2014/11/27 7618
We Chinese Have our own way to distinguish coaxial cables. We name it with different diameter of the core conductor, for example, 75-1, 75-2, 75-3, 75-4, 75-5, 75-6, etc. 75-1 diameter is smaller than 75-2. 75-2 diameter is smaller than 75-3, etc. And for video surveillance, we ofen use 75-3, 75-4, 75-5，The bigger diameter, the better quality for transmission, right?
And even for same 75-5 cable,They are different:
1. different materials, (some suppliers sell in low prices, using not good material for signal transmitting).
2. different weave numbers, such as 64, 96, 128. the bigger weave number, the better for signal transmitting. We often use 96, and 128.
I also compared the description about RG59, RG60, RG6, and others. I think RG59 is similar to our 75-4, or 75-5, but different factories have some different opinions.
Our domestic sales, who often do projects, he tells me that 75-3 can transmit up to 300m, and have some video loss, and usually we use cables to transmit 200 meters.
The RG59 is standard for CCTV, and very popular distinguish way to name the different coaxial cables. I mean, If you buy coaxial cable in China, you use the 75-
1/2/3/4/5, this info, the sales would be easier to get what you need, but for now, it is ok, when you say RG59, we know what you need. Some RG59 is 75-4, some factories, RG59 is 75-5
