FreeLists / si-list / [SI-LIST] 4-port node numbering

["Ray Anderson" <ray.anderson@xxxxxxxxxx>]

I have general question regarding 4-port s-parameter files. Does anyone
know if there is a generally accepted industry standard for node
numbering?
 

I have seen both of these schemes used in various places:

 

a)

 

        +-----+

    1---|     |-----2

        |     |            

    3---|     |-----4

        +-----+

 

 

 

b)

 

        +-----+

    1---|     |-----3

        |     |            

    2---|     |-----4

        +-----+

 

It has been my observation that scheme a) is the most common and
intuitive (when I think S12 I think transmission and when I think S13 I
think crosstalk) however scheme b) has popped up often enough to be a
possible contender.

 

Comments???

 

 

-Ray

 

 

Raymond Anderson

Senior Signal Integrity Staff Engineer

Product Technology Department

Advanced Package R&D

Xilinx Inc.

 

 


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