Smith Chart Example Pico VNA

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Volker
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Joined: Thu Feb 28, 2019 11:59 am

Smith Chart Example Pico VNA

Post by Volker » Tue Mar 05, 2019 7:05 am

is not working.

Using Matlab 2018b and PicoVNA2 2.11.0.16

[s11.freq, s11.Real] = getBlockData(picoVNAComObj, 'S11','real')
[s11.freq, s11.Imag] = getBlockData(picoVNAComObj, 'S11','imag')

wll result in

s11 =
freq : [101 x double]
Real : [151 x double]
Imag : [101 x double]

for some reasons the real part has to many values ( 151 instead of 101 ).
In this case you will get an error and the smith chart cannot be plotted

NeilH
PICO STAFF
PICO STAFF
Posts: 116
Joined: Tue Jul 18, 2017 8:28 am

Re: Smith Chart Example Pico VNA

Post by NeilH » Tue Mar 05, 2019 8:32 am

Hi

Have you made any alterations to the example script at all?
Also are you able to share the calibration file that you're using? If you can't do that here, you can send it into support@picotech.com
Neil
Technical Support Engineer

Volker
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Posts: 0
Joined: Thu Feb 28, 2019 11:59 am

Re: Smith Chart Example Pico VNA

Post by Volker » Tue Mar 05, 2019 12:25 pm

Hi Neil,

I have used the original files from Github. Nothing changed.
I will send you the DefCal.cal by mail to support.

Volker

NeilH
PICO STAFF
PICO STAFF
Posts: 116
Joined: Tue Jul 18, 2017 8:28 am

Re: Smith Chart Example Pico VNA

Post by NeilH » Mon Mar 11, 2019 8:45 am

Hi

I have been unable to reproduce what you've been seeing with the cal file you sent in.

Are you able to re-download the MATLAB add-on for the PicoVNA and try again just to check?

Neil
Neil
Technical Support Engineer

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