Re: Calibration coefficients - can one change them?
Hello David,
I mentioned in a much earlier post, I have no idea what is in the firmware definition for the standards supplied with the nanoVNA. In addition, based on the physical description of the
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alan victor
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#113
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Inside views...
And with battery upgrade. My unit doesn't have a built in battery, so I found one, for now works... but pretend to update the connections and the battery itself, this one is a "little" big for the
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Nuno
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#112
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Re: Calibration procedure
no attachements...
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Nuno
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#111
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Re: Calibration procedure
[email protected]> wrote:
I don’t see any attachments!
Dave, G8WRB
--
Dr. David Kirkby,
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#110
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Re: Calibration coefficients - can one change them?
What exactly do you mean by that? Are you saying that the firmware has the
ability to allow one to adjust the delay of the calibration standards? If
so that’s good news. Just being able to enter a
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#109
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Re: Calibration coefficients - can one change them?
Yes, calibration data can only be modified with electrical delay. For better accuracy, I customized the shortest and most accurate calibrations kits possible. Naturally, the accuracy of professional
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Hugen
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#108
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Re: Messaging (over USB-C) between nanovna and PC client - documented (or could be)?
Hi George,
I scarfed the commands by going through main.c (and a few posts here) and there is some ambiguity on how to format a few of them as well as how executing some might affect others.
If you
By
Larry Rothman
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#107
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Re: Calibration procedure
Some photos of my NanoVNA measuring a "6.5MHz" Butterworth LP
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dreschel@...
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#106
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Re: Messaging (over USB-C) between nanovna and PC client - documented (or could be)?
Hi Larry,
The NanoVNA command listing you posted is all that is needed to communicate with the NanoVNA.
I am writing an article on the NanoVNA as well as writing software to perform all the
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George
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#105
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Re: Messaging (over USB-C) between nanovna and PC client - documented (or could be)?
David,
Refer to my initial posting (a few posts back from this one) of the NanoVNA Console command listing as well as the Python sourcecode just mentioned.
That should be more than enough info to
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Larry Rothman
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#104
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Re: Messaging (over USB-C) between nanovna and PC client - documented (or could be)?
Hi David,
The simplest way is to read the Python source code example.
9600 bauds seems to be a right choice for USB communication speed.
Regards,
David, F4HTQ.
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David F4HTQ
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#103
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Messaging (over USB-C) between nanovna and PC client - documented (or could be)?
This is somewhat prompted by a recent question about PC application function/capabilities.
Is the (USB Communications) messaging between the nanovna unit and the host PC -
1. Documented?
2. Could be
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David Feldman
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#102
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List of NanoVNA Console Commands
NOTE:
I created this list by reviewing the older Github source code.
This is the first iteration and there WILL be mistakes - but it's a starting point for the documentation of the console
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Larry Rothman
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#101
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Re: Calibration coefficients - can one change them?
Dave, as far as I can tell to this point, there is no ability to enter your own polynomial coefficient of the standards. The unit comes with SOL 3.5 mm and they are described as fairly simple
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alan victor
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#100
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Calibration coefficients - can one change them?
I've got nanoVNA on order, but don't have it yet. It's not due to at least
4th July, so that's no big surprise.
Can anyone tell me if one can change the coefficients of the
open/short/load kit? I
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#99
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Re: Calibration procedure
Alan,
Thanks for message 83. I will try that this morning. Bill
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dreschel@...
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#98
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Re: Calibration procedure
Thank you! The photos are a great help!
Bill
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dreschel@...
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#97
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Re: Calibration procedure
See message #83. Alan
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alan victor
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#96
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Re: Calibration procedure
Bill, I wrote up a calibration sequence in an earlier thread. If you cannot find it, I will cut and paste in a reply. Currently this was done on the 2 -track unit but I assume the sequence is no
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alan victor
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#95
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Re: Calibration procedure
SMA male calibration kit (OPEN / SHORT /LOAD).
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Hugen
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#94
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