I have a three port S-parameter file with port 1 as a single ended input and ports two and three froming a differential pair as the output. I want to meaure the transfer function between ports 1 and the output differential pair and I'm not sure how to set it up. I would think the transsfer voltage function from one with a sense across 2 and three. Not sure how to do that with the input and output ports available.
If you're talking about Genesys 2006, there is a balanced port available from the Part Selector menu. Click "View
Take a look at the differential circuit example with one input port and two balanced outputs; it is attached to this post. Gain is defined as (S21-S31)*sqrt(2) (differential gain). You can replace the circuit with your s-parameter file in a block.
If this isn't what you're looking for, you may want to post your workspace.
Peter karasev
[file]differential_filter_for_unbalanced_and_balanced_systems.wsx[/file]
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