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Re: SimSmith - great, not only for Measuring resonance from coax far end.
Sorry, after having rearranged my text, some not meant to send text had remained below 73, Hans DJ7BA Sorry, please ignore this remainder. Von: DJ7BA <dj7ba@...> Gesendet: Freitag, 10. Januar
By DJ7BA · #9419 ·
Re: SimSmith - great, not only for Measuring resonance from coax far end.
Hi Jim, yes, once you got started using SimSmith, you will not want to miss it anymore. It is the perfect companion of NannVNA and NanoVNA saver or any VNA. You can not only ¡°measure resonance from
By DJ7BA · #9418 ·
Re: NanoVNA Presentation #measurement #nanovna-saver #tutorials
Hi Luc, Could you please show me the link for the english translation of your presentation? I can not find File Section on your website. Regards [email protected]> wrote:
By uni berry · #9417 ·
Re: RF Demo Kit Testing tutorial released
Test field 8 is a series LC. Hence at DC this is an Open. It most have a trajectory that rotates CW and cross the short side of the chart at the series resonate point. There after the Z must be
By alan victor · #9416 ·
Re: Amplitude calibration
Just to be clear, you are saying that the vna gives an insertion loss that is different than what the SA TG provides and the difference is as much as 2- 3 dB?
By alan victor · #9415 ·
Re: Amplitude calibration
There is a 2 to 3 dB difference between what the spec an says and the nanoVNA. I know the spec an is good as it is calibrated.
By ejfelix4976 <edsgarage@...> · #9414 ·
Re: Amplitude calibration
Is there a difference in S21 after thru calibration using a direct cable between CH0 and CH1? That should not be as the thru calibration should normalize S21 -- NanoVNA Wiki:
By Erik Kaashoek · #9413 ·
Re: RF Demo Kit Testing tutorial released
Hello Klaus, It looks like, tha we have slightly differen PCB layouts. My PCB layout was posted in number 9245. 73, Rudi DL5FA
By Rudi · #9412 ·
Re: RF Demo Kit Testing tutorial released
Hello Klaus, I am glad that your RF Demo Kit now works as it should. I think it is mainly for learning, and not for every day work. 73, Rudi DL5FA
By Rudi · #9411 ·
Re: Amplitude calibration
Thanks for the replies! Actually My spec an has a tracking gen which I normalize. I noticed after doing a cal on the nanovna and nanoVNA F that there is a 2 to 3 dB difference in the measurement. Used
By ejfelix4976 <edsgarage@...> · #9410 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
Sometimes the 'scale' function needs to be reset to 1:1. Bob
By Bob Albert <bob91343@...> · #9409 ·
Re: Poor Manual
From: Robert E. Gross Where can I get better manual or instructions? ========================== https://www.amazon.co.uk/guide-NanoVNA-Christoph-Schw%C3%A4rzler-ebook/dp/B083BB82G5/ David -- SatSignal
By David J Taylor · #9408 ·
Re: RF Demo Kit Testing tutorial released
This is correct. 8 contains a series capacitor. This is an isolator at low frequency.
By Klaus W?rner · #9407 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
Quite right, whatever impedance but no signal in on CH1 will show 50 ohm. Thanks. /Torbjorn
By Torbj?rn Toreson · #9406 ·
Re: RF Demo Kit Testing tutorial released
Yes. The other ones are OK.
By Klaus W?rner · #9405 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Hugen - Nice work. I am looking forward to working with the improved version. On the alibaba page, the four inch model is the more expensive of the two listed, correct? Cheers, bill
By bill K7WXW · #9404 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
50 ohm on CH1 means no input signal to CH1 as expected -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK
By Erik Kaashoek · #9403 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
Colin, What You see in blue on the screen is the CH1 Smith Chart and the value off 50 ohm is to best of my knowledge the input impedance of CH1. Switch to Channel 0 reflect and the marker will jump to
By Torbj?rn Toreson · #9402 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
Hi Hugen, True, it was sold as an original with the latest software. I soon realized that this was unfortunately not entirely true :-( This was before I discovered this forum and read that there were
By Colin Dexter · #9401 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
From https://github.com/hugen79/NanoVNA-H/tree/F303 Quote..... "NanoVNA is a very compact and portable vector network analyzer created by Mr. TAKAHASHI Tomohiro(edy555), which cost is very low. It is
By Roger Need · #9400 ·