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Re: Interpreting TDR, aka when to worry #nanovna-saver #tdr
Thanks for the tips everyone. After sending I realize what I'm particularly interested in is measuring cable and insertion loss ala
By Chris Prosser · #9820 ·
Re: New member intro
Hi Ben - Please check out the Wiki /g/nanovna-users/wiki
By Oristo · #9819 ·
New member intro
Good morning all, Just signed up for the list and thought I'd introduce myself. Name is Ben Hall, ham call KD5BYB. Was introduced to the NanoVNA buy an article on the RTL-SDR blog talking about an
By Ben Hall <kd5byb@...> · #9818 ·
Re: Interpreting TDR, aka when to worry #nanovna-saver #tdr
FWIW, the Wiki main page /g/nanovna-users/wiki/home#Documentation now clarifies that measurement techniques and tips are collected here:
By Oristo · #9817 ·
Re: Re : NanoVNA-Saver Linux update procedure
Bob Yes it is an issue with installing PyQt5==5.14.1 on LM19.3 (and other distros from what is reported here). I have not used Python3.6 for any of my tests, only Python3.7. 73 Nick
By Nick · #9816 ·
Re: Re : NanoVNA-Saver Linux update procedure
Thank you for your results Denis. The final post here http://python.6.x6.nabble.com/Error-installing-PyQt5-td5266150.html indicates that pip 19.3.1 fixed the problem on Debian Buster, whereas it
By Nick · #9815 ·
Re: Connectors on RF Test Board leads
IF you need a little more flexible test board, take a look on SDR-Kits : https://www.sdr-kits.net/DG8SAQ-VNWA-Testboard-kit Not all software functions of the DG8SAQ software can be used, but the
By Karsten, DD1KT · #9814 ·
Re: Interpreting TDR, aka when to worry #nanovna-saver #tdr
Hello Chris, the NanoVNA can do the TDR measurement without external software (Firmware updated last year November) : - CH0 Real (Display-> Format -> more-> Real), Smith - Display -> Transform -> Low
By Karsten, DD1KT · #9813 ·
Re: Interpreting TDR, aka when to worry #nanovna-saver #tdr
On Fri, Jan 17, 2020 at 07:43 PM, Chris Prosser wrote: " My return loss measurement is just fine, -35dB at 2m, -55dB at 70cm. So...do I care? "
By hwalker · #9812 ·
Re: Interpreting TDR, aka when to worry #nanovna-saver #tdr
Hi Chris, Somehow it looks like your 30ft length(5) is not lmr-400. On both ends the jump in impedance as well as the reflection do not match. Could you try to measure just the 30ft peace? The return
By ericm@... · #9811 ·
Interpreting TDR, aka when to worry #nanovna-saver #tdr
Hi Folks, A hats off to everyone who has contributed to the NanoVNA. I got mine last week and what a fantastic tool for the cost. I'm trying to understand the TDR measurements. I've attached a plot
By Chris Prosser · #9810 ·
Re: could use a little help with getting Nano Saver to work with my NanoVNA
Oristo wrote: (SHHHH!!!! If they scroll down, they might, by sheer luck or perhaps chance, see some of the other topics. This cannot be a bad thing....) -- wes will n9kdy
By N9KDY · #9809 ·
Re: Add FAQ document to the Wiki or Files section #faq
The only way that I have found for hyperlinks to content within groups.io Wiki pages is by not only forcing those entries to be headings, but also forcing (IMO ugly) table of contents on each of those
By Oristo · #9808 ·
Re: Nano VNA
Some day, I will get around to updating that. Even some genuine Hugen devices cannot overclock to 300mHz, so firmware was updated with console command `threshold` for altering 300mHz to whatever value
By Oristo · #9807 ·
Re: could use a little help with getting Nano Saver to work with my NanoVNA
/g/nanovna-users/wiki#Drivers
By Oristo · #9806 ·
Re: Re : NanoVNA-Saver Linux update procedure
On Fri, Jan 17, 2020, Rune Broberg wrote: So 3.7 it is, though it might work with 3.6 - I just don't test it with that. :-) Thanks, Rune. A quick update as I push the simple laptop idea is that Python
By Bob Larkin · #9805 ·
Re: could use a little help with getting Nano Saver to work with my NanoVNA
Ray, W4BYG wrote: /g/nanovna-users/wiki/Home Scroll down to the "Drivers" section. Look under the "Drivers" heading for the "Installing the STM32 Virtual COM port drivers" subtopic.
By N9KDY · #9804 ·
Re: could use a little help with getting Nano Saver to work with my NanoVNA
Ray, Check the Wiki for this group and it will point you to the drivers you need for Win 7 or Win 8.1... Roger
By Roger Need · #9803 ·
Re: could use a little help with getting Nano Saver to work with my NanoVNA
Herb, Thank you for taking the time to respond to my query. I am running the latest 64 bit, Win 7. The USB cable is the one that came with it. It does charge OK.? I assume it is good. So my further
By Ray, W4BYG · #9802 ·
Re: Add FAQ document to the Wiki or Files section #faq
The FAQ at /static/help appears to be classic HTML, not wiki. Something similar could implemented e.g. by linking to HTML source at github with multiple collaborators
By Oristo · #9801 ·