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measurement of transfer function of twisted pair

Question asked by bjtianli on Jun 30, 2006
Latest reply on Jun 30, 2006 by mmule54
hi, could anyone tell me, how to get the transfer function of a twisted pair with network analyzer?
the impedance of that twisted pair is not 50 ohm. if i use S21 as transfer function, must i add a matching circuit between network analyzer and  my twisted pair, so that there is no reflex wave? but i don't know how much is the twisted pair's impedance!