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Ernst, I have done something similar. I will see if I can gather up the worse case that I have considered. A calibrated 1 dB SMA pad terminated in a short. Hence, a 2 dB return loss, a reflection

I have commercial mismatches specified up to 4GHz with N-cnnectors (m). After calibration with the supplied SMA calset I mesured the mismatches connected via an SMA (m) to N(f) adapter. The result was

Hi Tim My main purpose in experimenting with the NanoVNA was to see if it could make a good impedance analyzer. Unfortunately, results so far indicate that it does not perform well in this respect. As

Hi Larry, I also did not understand Hugen comment. However, this is a guess based on what I see when the PC SW connects and pulls measured data from the nanoVNA instrument. This only occurs when you

FWIW this finally shipped, So less then worried now :) Here is to hoping its not a bad clone once it gets here!

Thanks

https://drive.google.com/drive/folders/1-JViWLBOIzaHTdwdONX2RP8S4EgWxoND -- 73, Mike, N1JEZ "A closed mouth gathers no feet"

Can someone re-post the link or show what message the google drive link is? Thanks Frank

What do you mean by reset cal data. Do you mean turn cal correction off before trying to collect new cal data. What key strocks are you talking about. Do you believe the unit is using modified

It is necessary to reset the calibration data before carrying out the calibration.

Hi George Could i perhaps loop in with you ... looking to build something better for Linux seems silly to double up the work if i can 'adjust' your code ... also thinking an Android app might be a

hugen, from outside your device looks same as the "worse clone". So only a look inside will tell if you got a good one. So I enclosed a picture of my device, hoping it is a good clone. Ernst

Hi Ernst. Not sure I understand your question. And the correction switch, is not clear to me either just yet. However, see my message 83. That is the sequence I have followed from the touch screen and

Still confused. When performing calibration from within NanoVNA V 1.03 all is well. Maybe I did something wrong when I calibrate from the touch screen. So what does the correction switch do, which is

Hi Ernst, When the calibration is complete does the side screen show all the elements of the cal. I assume you are doing an ISOL cal as well as a THRU cal despite perhaps not interested in a S21

Flashed firmware nanoVNA_800_ch_20190705.dfu. Unit still initialises from 50k to 900M. I performed calibration from 50k to 800M, but behavior is strange: there is always an offset of abt -24dB on

Just found new firmeware dated 20190705 on the well known google drive. Ernst

Folks, There appear to be two locations on GitHub for the nanoVNA firmware: original: https://github.com/ttrftech/NanoVNA hugen: https://github.com/hugen79/NanoVNA Both appear to be old and haven't

May I suggest that when the nanoVNA boot screen occurs, THE BOOT MESSAGE HAS THE FIRMWARE VERSION AND DATE AND TIME. THIS IS WHAT THE BIG BOYS DO. ________________________________ Sent: Friday, July

Hello hugen, thanks for your hard work. Where can we track your FW releases? Cheers! LL