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Re: NanoVNA port renormalization


 

Roger,

I believe DiSlord is indeed asking whether the ability to accurately
measure differing DUT input and output ports would be useful. It may not be
used often but there are definitely uses for testing baluns and other
asymmetrical two-port networks. I think ¡°port renormalization¡± doesn¡¯t
properly describe this type of measurement as opposed to 75/75 ohm
measurements. A different terminology would be better to describe 75/300
ohm measurements but I¡¯m at a loss to come up with a description that makes
sense. Ideas wanted.

Tony AC9QY

On Sat, Feb 8, 2025 at 7:09?PM John Gord via groups.io <johngord=
[email protected]> wrote:

Roger,
I am happy with the in/out impedances being the same. I just didn't want
the renormalization feature the disappear.
--John

On Sat, Feb 8, 2025 at 03:24 PM, Roger Need wrote:


On Sat, Feb 8, 2025 at 12:35 PM, John Gord wrote:


The renormalization is useful for measuring networks (like crystal or
ceramic
filters) which are designed for other impedance levels.
Do you want different impedances on input and output? I believe that
is what
DiSlord is suggesting...

Roger




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