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On Tue, Jun 11, 2019 at 07:52 PM, Frank S wrote:

Is there a way to tell what rev the firmware is?

HOME MENU->CONFIG->VERSION

Bob
KN6UXD

This is a "where is Waldo" on the menu spider-web question. How do start a rescan after I change parameters? Is there an FAQ that beginners should read? A "NanoVNA for Dummies" book that you can recommend?

Thank you,
Bob
KN6UXD

I realize this is similar to a recent topic but a bit different.
As the "TDR" function in the nanovan is not actually a time-domain process, is there a wat to differentiate between a short or open fault in a cable?
I have previously built a generator which can produce a very short pulse or a step with fast risetime. I have used it in conjunction with a scope as a TDR. It works reasonable well and you can clearly see an open or short in a cable.
Is there a way to replicate tis with a nanovna?

a useful hint when identifying torrides type 31 has resistance across the
surface . type 43 has none. Different materials.

--
*Gene Ruff*

43 or 31 material are appropriate for HF applications. 43 is better for
20-meters upward and 31 material is best for 160 through 40 meters. If you
are sure you have 43 material, there really is no reason to test the
toroids.

Dave - W0LEV

--
Dave - W?LEV

Dears,

FT240-43 Torroid, Can I use my NanoVNA to meassure my several torroids to be sure that I have the correct ones for HF UNUN?

any info is welcome

73,
Kurt

On 21/06/2023 19:05, Fran?ois wrote:

** Ok but the files would be in a .zip it would happen all at once while keeping the structure
-- F1AMM Fran?ois

That is exactly what I do with my own software, but I then have to ask users not to overwrite and files they have personalise. You can't win!

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Strange, yes, but personally I prefer it that way, so that you know exactly
what is being added to your computer rather than a massive install.exe with no
idea what it contains!

** Ok but the files would be in a .zip it would happen all at once while keeping the structure
--
F1AMM
Fran?ois

-----Message d'origine-----

De la part de David J Taylor
Envoyé : mercredi 21 juin 2023 17:23

On Wed, Jun 21, 2023 at 09:27 AM, Chris K2STP wrote:

Now there is a GREAT suggestion for the Nanovna, add a firmware update option
to the PC Saver program!! This way we have an “all in one” application to
use and manage the nano.

Use NanoVNA-App

On Wed, Jun 21, 2023 at 06:38 AM, David J Taylor wrote:

On 20/06/2023 06:07, Fran?ois wrote:

The program can also update the firmware.

Now there is a GREAT suggestion for the Nanovna, add a firmware update option to the PC Saver program!! This way we have an “all in one” application to use and manage the nano.


--
Regards,
Chris K2STP

On 21/06/2023 12:05, Fran?ois wrote:

Hello
Thank you for the link.
It's strange that we have to download file by file.
It's done, thank you
73
-- F1AMM

Strange, yes, but personally I prefer it that way, so that you know exactly what is being added to your computer rather than a massive install.exe with no idea what it contains!

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

On Mon, Jun 19, 2023 at 11:23 AM, RJOLLIS wrote:

if there was a short in the coax

Did you check it with an ohmmeter?
BTW, I noticed in the first picture that you're using/reading S21. Is that correct?
And "Transform" was set to "OFF". (but maybe you changed that after taking the picture)
--
Doug, K8RFT

Hello

Thank you for the link.
It's strange that we have to download file by file.

It's done, thank you
73
--
F1AMM
Fran?ois

De la part de David J Taylor
mercredi 21 juin 2023 12:39

The Nano's TDR function can show 'defect' location - even multiple "feature" locations. It shows distance in meters. You move the cursor to the "odd spot" in the trace, and read the distance to there. That works well, but the start and stop frequencies must be correct for the distance range that you want, and you must set the cable velocity factor.
There is a good video on using the nanovna to measure coax length, by W2AEW, on youtube. That method will also show any fault or discontinuity location (distance, in meters).
--
Doug, K8RFT

On 20/06/2023 06:07, Fran?ois wrote:

Hello
I have never used this kind of small spectrum analyzer TinySA
- I read that there are at least 2 software on PC (like nanoVNA-saver) which allow to connect the small box TinySA. I don't want to tear my eyes out too much on a screen that's too small.
- I don't see any "groups.io" discussing this topic. Did I search wrong?
-- F1AMM Fran?ois

Fran?ois,

Gyula has already pointed you to the group (thanks).

The newer and more capable TinySA Ultra has a "4-inch" screen which is adequate (for me) for many things, but there is a TinySA program for the PC which provides a bigger display. The best source of information is the Wiki, and the group, of course:



The TinySA App can also be downloaded from here:



The program can also update the firmware.

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Hi Doug
Do NOT cut the wire just fold it back at the insulator
and tape it in place.
Cheers John G4FRD

---
New Outlook Express and Windows Live Mail replacement - get it here:

On 20/06/2023 13:44, Donald S Brant Jr wrote:

Even a "bad and slow" SA function is better than nothing if there is no alternative. It does not need to be perfect to be useful.
73, Don N2VGU

Don,

My preference would be for the developer's effort (for which we are all extremely grateful!) to go into improving the VNA functions, especially as there are spectrum analysers in the NanoVNA format already available.

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Only thing missing is distance to problem in meters or feet. You have to quess the Er.

On Mon, Jun 19, 2023 at 09:59 AM, Siegfried Jackstien wrote:

sma to reverse sma??

Yes, I suppose I do, no pin so open(no contact). Lesson learned!

Thank you again,
Muggs KC3UDZ

A true TDR sends out a short pulse and looks at the time it takes for that pulse to return.
The NANO VNA sweeps frequency and notes where the frequency when reflected impedance approaches Infinity and Zero Ohms.? ? ?Different resonate points? ?Then calculates the length of the line from it's resonate points.Same result, different methods.??
I own 3 TDR's and a good TDR will show you where along the line the coax has been stepped on, has a defect, or even where some water has leaked into the line.? The Nano is not going to get to those levels, but what do you expect for 20 dB less money?? ??
The Nano works in the Frequency Domain, a TDR? (Time Domain Reflectometer) works in the Time Domain.So technically the Nano is not a TDR.? ? But gives a similar answer.? ? ? ?Kent WA5VJB? For many years an Applications Engineer with Tektronix.?




On Tuesday, June 20, 2023 at 07:16:11 AM CDT, DougVL <k8rftradio@...> wro On Mon, Jun 19, 2023 at 01:32 PM, Stan Dye wrote:

recent firmware has a
Cable Measure function built in. Have you tried that?

It's a wonderful, very useful feature.? Very quick and easy to use, no other settings to make.
It does use a different method than TDR, and is explained in the info for the first firmware version that includes the feature. (I don't have that text available to quote here, though - sorry!)
--
Doug, K8RFT