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ENA and s4p Files

Question asked by M42 on Mar 18, 2011
Latest reply on Mar 19, 2011 by odanzy

I am measuring a 4 port balanced device in a bal-bal topology (logical port1=1,2 & logical port2=3,4) with a large number of data points(>>>1601) and a IFBW of 100 Hz.  I would like to get the sdd11,sdd22,sdd12,sdd21,scd11,scd22,scd12,cd21,sdc11,sdc22,sdc12,sdc21,scc11,scc22,scc12,scc21measurements.  Due to the large number of data points, I am restricted to a maximum of 1 channel and 4 traces.  I could perform 4 different sweeps to get all 16 mixed mode s-parameters, but that requires a lot of time due to the low IFBW and number of points (both of which I am unwilling to change for accuracy reasons).  Can I export the s4p file and then calculate all of the mixed mode s-parameters?  If so, where can I find the equations for this?  I found four of them in the Agilent FAQ here  Is there an application note somewhere that addresses this?

Thanks in advance for you help