I don't know how you came up with that conclusion. Even the cheapest
NanoVNAs I'm aware of have the ability to do SOL compensation. Most
even come with the loads.
If you meant feedline length compensation, OK ... but that's a totally
different matter. And just about every NanoVNA can be operated and
controlled by NanoVNASaver, which is a free application that can create
an .s1p Touchstone file, which in turn can be inputted into Zplots (a
free application from AC6LA) which DOES have the ability to calculate
the impedance at the far end of a transmission line.
Or you can just take the reading from the near end of the coax and feed
that impedance into either TLW or TLD (similar apps that are both free)
to determine the impedance at the far end. This is what I typically do
for single frequency measurements. And like somebody else here posted,
you don't even need to physically measure the length of the coax if you
can get to the far end. Just short it and plot a sweep to determine the
length.
Dave AB7E
On 2/11/2026 4:55 PM, Tom Hellem wrote:
Yes it seems few or none of the typical analyzers have the capability
to do the SOL compensation.
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