On Mon, 30 Aug 2010 23:08:34 -0800, Edward R. Cole wrote: >I believe Cat-5e is isolated up to 100-KHz.
In essence, the ability of twisted pair to reject HF noise is directly related to the number of twists per inch, and the uniformity of the twist. The close spacing of the twist also helps. High quality twisted pair like any of the CAT5/6/7 cables continues to reject noise well into the VHF range, although the degree of rejection degrades with increasing frequency. Noise rejection is also a function of the balance of the receiver, and to some extent, the balance of the output stage that drives the line. CAT5/6/7 cables as a group are constant impedance (100 ohms) and have relatively good bandwidth (well into the tens of MHz). Like any transmission line, loss increases with frequency. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
