When reading the specifications for cameras, ccu's etc, what do they mean by a 'BNC type (1)'?

Question

I know this means BNC connector, but with the type (1) type (2) type (4) etc, what does this refer to?

I was thinking the amount of pins but I am not sure? Or maybe it just means it has more than one connection portal, so (1) plug or (2) plugs, but then why use the word type?

If they are different, then what about the specs that just say BNC for the input or output? How can I tell what type they are?

Thanks for your help in advanced... I am a bit confused....

Answer 1

Two distinct types of 75 Ω BNC's are available, and both mate with each other and with 50 Ω  BNC's. Type 1 is designated 75 Ω  BNC-T1 and provides constant 75 Ω  performance with low VSWR DC 4 GHz. Type 2 is designated 75 Ω  BNC-T2 and is usable with low reflection DC - 1 GHz. For applications above 1 GHz, Type 1 is recommended.

So above are RF connections I think it stands for radio frequency, used on TV aerial cables, a frequency that is tuned into by a receiver like a TV or Video.

BCN 3 & up are carrying a different signal, with a cable for each component, same spring loaded bayonet connecting system just with different applications.

http://www.cablesondemand.com/pcategory/...

Answer 2

BNC connectors have been the standard of broadcast television ... they are basically a quick connect coaxial cable connection.

This link will show you what one looks like and the applications that use it.

http://en.wikipedia.org/wiki/BNC_connect...