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Re: H4 + nanovna-saver calibration


 

Jon,
Log into the groups.io nanovna group and go to the Files section.
Look for the "Absolute Beginners Guide". I think V6.20 is the last update.
It does not cover all the bells and whistles of the latest firmware, but it is a good basic intro to the NanoVNA and VNAs in general.
By the time you work through that, you will be well on your way.
There is also a reasonably up to date version of the Menu Tree document in there too somewhere. It explains in detail what the various Menu Items do.
Enjoy your fantastic new piece of test equipment.
HTH. Cheers...Bob VK2ZRE

On 27/04/2025 4:26 pm, Jon via groups.io wrote:
Thank you Dave.

On Sun, Apr 27, 2025 at 5:07?AM W0LEV via groups.io <davearea51a=
[email protected]> wrote:

No, it does not. However, there are several publications out that instruct
one on using the NANOVNAs. Once you learn the basics, that should map over
to any VNA, professional or NANO.

Dave - W?LEV

On Sat, Apr 26, 2025 at 11:06?PM Jon via groups.io <vu2jo0=
[email protected]> wrote:

Dave,

Does the NanoVNA come with an instruction manual?

I received only a menu chart, and no other booklet.

73

Jon, VU2JO

On Sun, Apr 27, 2025 at 3:45?AM W0LEV via groups.io <davearea51a=
[email protected]> wrote:

Yes, if your SAVER is miles outside of your intended cal range, you
need
to
do a cal on the native device first. I've never had that problem, so I
wouldn't know. I've used professional VNAs for decades on the job (I'm
now
retired) and own an HP 8753C, so I really didn't have to even open the
instruction book. Please forgive me.......

Dave - W?LEV

On Sat, Apr 26, 2025 at 6:17?PM Stan Dye via groups.io <standye=
[email protected]> wrote:

On Sat, Apr 26, 2025 at 10:39 AM, Dean W8ZF wrote:

because MAYBE it depends on the H4's cal state
From the nanovna-saver github readme (
):
Quote:
Calibration

Before using NanoVNA-Saver, please ensure that the device itself is
in
a
reasonable calibration state.

A calibration of both ports across the entire frequency span, saved
to
save slot 0, is sufficient. If the NanoVNA is completely
uncalibrated,
its
readings may be outside the range accepted by the application.

-------------
And from the code itself, the following code fragment shows that
nanovna-saver uses the "scan" command, rather than the "scanraw"
command,
to get its data from nanovna. The "scan" command returns S11/S12
data
with nanovna internal calibration (if any) applied.

def setSweep(self, start, stop):
self.start = start
self.stop = stop
list(self.exec_command(f"scan {start} {stop}
{self.datapoints}"))
-------------

So nanovna-saver indeed does depend on the calibration state of the
nanovna; they are not independent.
Q.E.D.

If you want independent calibration, use nanovna-app instead. It is
a
quite different application with its own learning curve, but it has
specific settings to use the nanovna internal or nanovna-app
calibration.
I use both apps, they both have excellent features.

Stan KC7XE





--

*Dave - W?LEV*


--
Dave - W?LEV








--

*Dave - W?LEV*


--
Dave - W?LEV






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