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Don't move the marker by touching it.? Use, instead, the multipurpose rocker control at the top.? Rocking it one way or the other will move the marker in use.? To change markers you go to the menu.

So I just hold it in place and can charge the battery via the ST-LINK?? I don't care about programming at this point but I would like connectivity to a computer.? Holding it in place is another story.? I already have charging capability so it's just data I need to get.
Bob

Have you used a stylus? Fingers are too large for that little screen.
*Clyde K. Spencer*

#81: On the Physical Expression of Two-Port S-Parameters

Hello,

Allow us, please, to announce that in our sow and facupov
we just expressed physically (that is in a way similar to that
of the Measurement of Ratio of Quantities, which were
introduced by others * and are constantly used since then)
the S11, S12*S21, S22 parameters of a two-port network
in terms only of the VNA reflection measurements of
(S, L, O) loads, with Standard Nominal Values (-1, 0, +1)
respectively, and we uploaded our results at:



Sincerely,

gin&pez@arg

*

:81#

Just received my new NanoVNA and beginning to learn how to use it.? I have read the "user guide" but it is not much help with my problems:

After I set the menu settings for display, frequency, etc., and start trying to use it, I am having trouble moving the markers to where I want them on the trace.

As I go to touch a marker to move it where I want it, the menu comes up automatically on the right and the marker doesn't move. I close the menu and try again with the same result.? Repeated attempts will eventually allow me to move the marker, but it is still problematic.

What am I doing wrong or missing?

Also, is there a setting where I can tell it to boot back up to my last screen settings, instead of the factory default out to 900 MHz?? This would allow saving the battery when I have to be make extended changes to an antenna and not have to reprogram everything again.

Additionally: Is there software for use with a Win 7 or Win 10 PC and for Android?

Your assistance would be appreciated.
Ray, W4BYG

No problem. We've all been (more than once)



On Sat, 7 Dec 2019 at 5:10 PM, John<jrdale@...> wrote: Larry--sorry this was my sheer stupidity--of course it is remembering your preferences, I was loading an older file before I had applied them, it is just amazing in its flexibility.

Hi Rudi
Your screen shots is very hard to view. A dark background would help a lot.
I think the other details is explained in the report you just have received
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af reuterr@...
Sendt: 7. december 2019 21:43
Til: [email protected]
Emne: Re: [nanovna-users] New version of NanoVNA-Saver: 0.2.1

Hello Kurt,

here follows the forgotten attachment: nanoVNA-saver_RG174-30cm-open-end_corrected.png

73, Rudi DL5FA

Hi Rudi
I have made a report which by examples show you how to do. You have a poor calibration as the trace is outside Smith Chart and you have not impelemted the delay You need to use the latest 0.2.1 NanoVNA-Saver with Offset implemented which has an error as the delay is to enter by a factor of 10.
Regarding difficulties to see the entire NanoVNA-Saver remember to maximize and in my case font size 7 then it is perfect
Kind regards
Kurt


-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af reuterr@...
Sendt: 7. december 2019 19:19
Til: [email protected]
Emne: Re: [nanovna-users] New version of NanoVNA-Saver: 0.2.1

On Sat, Dec 7, 2019 at 03:54 PM, Kurt Poulsen wrote:

Regarding the impedance issue i did look at the phase oscillation from
0.5 to 500MHz when I in the ZPLots has subtracted the length where the
Phase approaches a straight line with oscillations. Then I change the
ZO on either side off 50 ohm in steps of 0.1 ohm and for 51.4 ohm the
phase oscillation was minimized. The return loss oscillation is not
changed by changing the Z0 but rather due to port mismatch.

Hello Kurt,

Thank you very much for your quick answer.

I have 3 questions:
1. Where did you subtract the length (20 cm) ?

2. Did you mean that the S11 phase oscillation curve (about sinus) horizontal center line
should be minimised to a straight line and not be bowed?

3. Did you mean with the change of Z0 to connect a resistor of 50 Ohm
at the end of the 22 cm coax cable? And then vary this resistor in 0.1 Ohm steps
to minimise the amplitude of the phase oscillation amplitude?

I mean your file "NanoVNA supplied cable 50K to 500MHz.png" in post 7877 at 2019-12-05 20:10.

In this screen shot there are 2 diagrams with S11 Phase.
When I try to get a similar diagram with a 30 cm RG174 coax cable with open end I get see attached screen shot nanoVNA-saver_RG174-30cm-open-end.png

73, Rudi DL5FA

if you're talking about save trace and grid colors on NanoVNA, you can do it with menu CONFIG => SAVE.

But these colors cannot be saved if you're loading different firmware file into NanoVNA.

John, could you please explain, what you're talking about?

Larry--sorry this was my sheer stupidity--of course it is remembering your preferences, I was loading an older file before I had applied them, it is just amazing in its flexibility.

Hello Kurt,

here follows the forgotten attachment: nanoVNA-saver_RG174-30cm-open-end_corrected.png

73, Rudi DL5FA

Hello Kurt,

My screen shot of nanoVNA-saver of the 30 cm RG174 coax cable shows wrong data.
I have my 50 cm RG316 tes coax cable forgotten to insert.
Please see the corrected screen shot: nanoVNA-saver_RG174-30cm-open-end_corrected.png

73, Rudi DL5FA

On Sat, Dec 7, 2019 at 03:54 PM, Kurt Poulsen wrote:

Regarding the impedance issue i did look at the phase oscillation from 0.5 to
500MHz when I in the ZPLots has subtracted the length where the Phase
approaches a straight line with oscillations. Then I change the ZO on either
side off 50 ohm in steps of 0.1 ohm and for 51.4 ohm the phase oscillation was
minimized. The return loss oscillation is not changed by changing the Z0 but
rather due to port mismatch.

Hello Kurt,

Thank you very much for your quick answer.

I have 3 questions:
1. Where did you subtract the length (20 cm) ?

2. Did you mean that the S11 phase oscillation curve (about sinus) horizontal center line
should be minimised to a straight line and not be bowed?

3. Did you mean with the change of Z0 to connect a resistor of 50 Ohm
at the end of the 22 cm coax cable? And then vary this resistor in 0.1 Ohm steps
to minimise the amplitude of the phase oscillation amplitude?

I mean your file "NanoVNA supplied cable 50K to 500MHz.png" in post 7877 at 2019-12-05 20:10.

In this screen shot there are 2 diagrams with S11 Phase.
When I try to get a similar diagram with a 30 cm RG174 coax cable with open end
I get see attached screen shot nanoVNA-saver_RG174-30cm-open-end.png

73, Rudi DL5FA

Hi Chuck,
thanks for confirming that installing the VC++ redistributable solved the
problem! :-) I hope you enjoy using the software!

--
Rune / 5Q5R

Hello Rudy
Regarding the impedance issue i did look at the phase oscillation from 0.5 to 500MHz when I in the ZPLots has subtracted the length where the Phase approaches a straight line with oscillations. Then I change the ZO on either side off 50 ohm in steps of 0.1 ohm and for 51.4 ohm the phase oscillation was minimized. The return loss oscillation is not changed by changing the Z0 but rather due to port mismatch.
I have 3
NanoVNA's and I just picked a random which I measured as shown and it is longer than the one I mentioned in the previous post. The two cables I got delivered with the NanoVNA-H in enclosure has test cable of 23cm between calibration planes and I did not measure the accurate length before now.
Regarding the comment about nanoVNA-saver screen shots I do not catch what you refer to versus "NanoVNA supplied cable 50K to 500MHz.png" It is something I have supplied or what ?
Regarding the problems with space versus underscore I do know but for old pdf files I cannot change as links are made in may document. I a slowly changing my behavior.
Kind regards
Kurt


-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af reuterr@...
Sendt: 7. december 2019 14:31
Til: [email protected]
Emne: Re: [nanovna-users] New version of NanoVNA-Saver: 0.2.1

On Thu, Dec 5, 2019 at 08:10 PM, Kurt Poulsen wrote:

The same test done for the 20cm long test cable supplied with the
NanoVNA. Its traces look very much like a cable not being 50 ohm

Hello Kurt,

Thank you very much for your interesting comparison of the two coax cables.

Unfortunately I could not understand by which parameter you conclude that the 20 cm NanoVNA supplied cable (RG174?) does *not* have 50 Ohm.
Do you please have a more detailed explanation for that assumption?

In your posting 7937 (2019-12-06 23:04) you appended the file: "Measurements of test cables.pdf" you wrote also about a 33 cm NanoVNA supplied cable (RG174?). Is that the same coax cable like to 20 cm NanoVNA supplied cable (RG174?) you mentioned in post 7877 ?

By the way, the nanoVNA-saver screen shots in x=1024 pixel size are very difficult to read by me (NanoVNA supplied cable 50K to 500MHz.png). I am using a font size of 11 pt and a x width of about 1600 pixel.
If you replace in the PDF file names the SPACE characters by an underscore it will give less problems in a web link.

73, Rudi DL5FA

On Thu, Dec 5, 2019 at 08:10 PM, Kurt Poulsen wrote:

The same test done for the 20cm long test cable supplied with the NanoVNA. Its
traces look very much like a cable not being 50 ohm

Hello Kurt,

Thank you very much for your interesting comparison of the two coax cables.

Unfortunately I could not understand by which parameter you conclude
that the 20 cm NanoVNA supplied cable (RG174?) does *not* have 50 Ohm.
Do you please have a more detailed explanation for that assumption?

In your posting 7937 (2019-12-06 23:04) you appended the file: "Measurements of test cables.pdf" you wrote also about a 33 cm NanoVNA supplied cable (RG174?). Is that the same coax cable like to 20 cm NanoVNA supplied cable (RG174?) you mentioned in post 7877 ?

By the way, the nanoVNA-saver screen shots in x=1024 pixel size are very difficult to read by me (NanoVNA supplied cable 50K to 500MHz.png). I am using a font size of 11 pt and a x width of about 1600 pixel.
If you replace in the PDF file names the SPACE characters by an underscore it will give less problems in a web link.

73, Rudi DL5FA

Please be more specific. What application are you using or is this through console commands?



On Sat, 7 Dec 2019 at 7:08 AM, John<jrdale@...> wrote: Small request---I do. not see anywhere a way to save colour changes e.g. in background on graphs or foreground lines, it would be nice to save one's own preferences ????
Jrd VE7QJD

Small request---I do. not see anywhere a way to save colour changes e.g. in background on graphs or foreground lines, it would be nice to save one's own preferences ????
Jrd VE7QJD

Not split, zplot!? Stupid auto spelling correction :-(



On Sat, 7 Dec 2019 at 6:57 AM, Larry Rothman<nlroth@...> wrote: Lajos,
Try using the Split with?SoftMaker Office?, free version. They claim that it will accept anything written for MS Office. There are versions of?SoftMaker Office? for Win, Linux and Mac but I am not sure if all are free or just Win version.?
RegardsLarry



? On Sat, 7 Dec 2019 at 5:47 AM, pgc1682@...<pgc1682@...> wrote:? Hi Kurt and Erik,

Thanks for many comments, tests.

Of course Nanovna is very great. Pierce/value is very good. Support from developers and from users also very good.

I think nanovna-saver for expert users, but of course many functions not required for beginners. Good method the switchable user interface, or simpler program. Switchable simple/advanced user interface easy coding, but requires lot of work.

My name is Lajos H?ss. I am radio amateur. Callsign is HA8HL. So i am not alien, maybe more dangerous. ;-) I not know. Sorry for bad too short footer on messages.

This is my hobby, on low budget. I interesting to antennes, vna-s, cables, special optimized antenne tuners for my stations. I not have good qth. I helped lot to others hams for free, we measure and optimize many antennas. But I not undertand correctly many things. To learning, everything is interesting. Ultra low budget Pixie2 CW transceiver to industrial, military system. I not have professional vna. But help a lot, what is the goal. Of course, professional grade system impossible from 50 usd system. I use and test many diffent type amateur grade instrument (not my). Lot of preblems found. Quality check important for me. if i know what problem exist, will be better use the existing tools. Professional grade instrument extreme expensive for me.

Kurt, thanks the detailed reply, requires more time to me understand correctly.

Zplots good free tools, but requires not free expensive Excel. Nanovna best for low budget. I think experts can share for free the required maths. I see Sim Smith Chart programmer comment also get the math to his program.

So nano good and will be better. Thanks to everyone.

73,
Lajos