Re: Android app cable not working!
Kayak,
it seems to me, that you place the OTG adapter at the NanoVNA and not at the smartphone. Why do you need otherwise the"...USB-A to
micro-USB cables.."?
You need an OTG adapter plugged into the smartphone. The OTG adapter has a USB-A socket, into which you plug the USB-A to USB-C cable, which comes with the NanoVNA.
--
Joerg, EX-DB2OO
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Re: Anyone had news from Maggie King?
Got a message this morning! it is en route! Le mer. 19 f¨¦vr. 2020 ¨¤ 07:43, Lawrence Macionski via Groups.Io <am_fm_radio@...> a ¨¦crit : I also ordered one during the "New Years" shutdown (wink-wink) and knew
there would be a wait. Never heard a thing. Till I read these messages. I
sent a second message to Maggie K.. Hopefully this one will be answered..
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Re: how can I get the raw data of (magnitude, phase) ?
On Wed, Feb 19, 2020 at 05:55 AM, pez.arg wrote:
Instead of the calculated (real, imaginary) parts of (s, l, o, and rho) measurements, is there any way to get the raw data (magnitude, phase) of them ?
========================================================================================
With a serial terminal program connected to the NonaVNA, typing data(0) will return raw complex values for CH0. Typing data(1) will do the same for CH1. The complex data can be converted to magnitude and phase by computing the log and angle.
Using NanoVNA-saver or another program, data saved to s1p or s2p is also saved as complex values which may be likewise converted.
- Herb
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Re: negative impedance values in smith chart
I had something similar, re-setting Smith chart Scale to 1 fixed
--
I_B_Nbridgema
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NanoVNAPartner on Windows XP
I hope I have compiled useful material. It works for me.
73, Gyula HA3HZ
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how can I get the raw data of (magnitude, phase) ?
Instead of the calculated (real, imaginary) parts of
(s, l, o, and rho) measurements, is there any way
to get the raw data (magnitude, phase) of them ?
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Re: negative impedance values in smith chart
hello, hernan,
I suspect that the support values are too far apart during calibration. Therefore the interpolation can lead to incorrect results. Try it again with NanoVNA-Saver and a smaller scan range.
--
DH1AKF
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Re: Anyone had news from Maggie King?
I also ordered one during the "New Years" shutdown (wink-wink) and knew there would be a wait. Never heard a thing. Till I read these messages. I sent a second message to Maggie K.. Hopefully this one will be answered..
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Re: Android app cable not working!
two android phones, three cables and using the web app as well as
the android app, always the same "no device found" error. Sadly, some Android devices for which OTG connects to e.g keyboards or flash drives will not work with virtual COM port devices, but you could also try nanoVNA with this Serial USB Terminal app using its CDC device setting Generic OTG connection checker:
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Re: negative impedance values in smith chart
Sorry I forgot to mention it. I did calibrate it. And also tried with a
second nanoVNA. In both cases I got the weird impedance values.
So far I've been using the vna to measure HF antennas with no problems. The
results always matched other swr meters, for example.
El mi¨¦., 19 feb. 2020 08:40, Reinier Gerritsen <r.gerritsen@...>
±ð²õ³¦°ù¾±²ú¾±¨®:
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Show quoted text
Check you calibration
Op 19-2-2020 om 12:12 schreef Hern¨¢n Freschi:
I recently tried to measure input impedance on a helical filter. the problem is, the plot went outside the smith chart, and the marker showed
negative impedance values and other crazy stuff.
what could be the cause for this?
the filter was only 137mhz so it should be well within the range of the
VNA. the expected impedance is 50 ohms. the filter passband was measured
correctly, and the return loss showed a sane value. only the smith chart
was empty.
thanks.
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Re: negative impedance values in smith chart
Check you calibration
Op 19-2-2020 om 12:12 schreef Hern¨¢n Freschi:
toggle quoted message
Show quoted text
I recently tried to measure input impedance on a helical filter. the problem is, the plot went outside the smith chart, and the marker showed negative impedance values and other crazy stuff.
what could be the cause for this?
the filter was only 137mhz so it should be well within the range of the VNA. the expected impedance is 50 ohms. the filter passband was measured correctly, and the return loss showed a sane value. only the smith chart was empty.
thanks.
|
negative impedance values in smith chart
I recently tried to measure input impedance on a helical filter. the problem is, the plot went outside the smith chart, and the marker showed negative impedance values and other crazy stuff.
what could be the cause for this?
the filter was only 137mhz so it should be well within the range of the VNA. the expected impedance is 50 ohms. the filter passband was measured correctly, and the return loss showed a sane value. only the smith chart was empty.
thanks.
|
Re: Anyone had news from Maggie King?
Hi
I just had a shipment from them.
It's due for delivery tomorrow.
She has didn't respond to any messages, but the package got shipped.
Kind Regards
ZS1SCI
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Re: Android app cable not working!
Before I go to that testing, my Windows 10 PC communicates fine with
the Nano using nanovnasaver...
but two android phones, three cables and using teh web app as well as
the android app, always the same "no device found" error.
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Show quoted text
On Tue, Feb 18, 2020 at 6:49 PM Larry Rothman <nlroth@...> wrote:
Dumb question: have you tried using TeraTerm on a PC to talk to your Nano via the console?
If that works, then refer to the following thread and see if your phone can talk through a terminal app...
/g/nanovna-users/message/9978
On Tue, 18 Feb 2020 at 6:15 PM, Kayak<kayak1176@...> wrote: weird. I just received my THIRD OTG adapter cable and two USB-A to
micro-USB cables, and tried the supposedly always-compatible nano web
version on the J7 Prime and the LG Aristo, no joy whatsoever. 'no
compatible device found' doesnt work in the app either.
Two apps
Three OTG adapter caboles
Two phones
Two USB cables
Zero luck.
On Tue, Feb 18, 2020 at 1:48 PM gary <w9td@...> wrote:
Here is my Willkac cable working with a Moto X to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD
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Re: Anyone had news from Maggie King?
I went to my alibaba before asking question here.
thanks Hugen for the answer, I paid the extra 10$ for DHL shipping cause I
wanted it faster.. I do understand there was a longueur holiday then
expected. so will have to wait.
Left a message yesterday. still no response.. I just hope she is ok , same
for Hugen.
toggle quoted message
Show quoted text
Le mar. 18 f¨¦vr. 2020 ¨¤ 16:56, PA7RG <robert.pa7rg@...> a ¨¦crit : In my alibaba I found this.
Feb. 15, 2020, 03:17:44 PST., the order has been shipped.
So I¡¯ll have to wait.
Best regards,
Robert PA7RG
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Re: Android app cable not working!
Dumb question: have you tried using TeraTerm on a PC to talk to your Nano via the console? If that works, then refer to the following thread and see if your phone can talk through a terminal app... /g/nanovna-users/message/9978 On Tue, 18 Feb 2020 at 6:15 PM, Kayak<kayak1176@...> wrote: weird. I just received my THIRD OTG adapter cable and two USB-A to micro-USB cables, and tried the supposedly always-compatible nano web version on the J7 Prime and the LG Aristo, no joy whatsoever. 'no compatible device found'? doesnt work in the app either. Two apps Three OTG adapter caboles Two phones Two USB cables Zero luck.
On Tue, Feb 18, 2020 at 1:48 PM gary <w9td@...> wrote:
Here is my Willkac cable working with a Moto X? to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD
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Re: Android app cable not working!
weird. I just received my THIRD OTG adapter cable and two USB-A to
micro-USB cables, and tried the supposedly always-compatible nano web
version on the J7 Prime and the LG Aristo, no joy whatsoever. 'no
compatible device found' doesnt work in the app either.
Two apps
Three OTG adapter caboles
Two phones
Two USB cables
Zero luck.
toggle quoted message
Show quoted text
On Tue, Feb 18, 2020 at 1:48 PM gary <w9td@...> wrote:
Here is my Willkac cable working with a Moto X to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD
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Re: Functions of the rocker switch
Some of the forum members including myself have removed the jog switch and installed buttons.? Check the files section for hardware mods.? On Tue, 18 Feb 2020 at 5:34 PM, DaveH52<ac2gl.dave@...> wrote: I think it's primary function is to break. Looks like I've got some inventing to do.
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Re: Functions of the rocker switch
I think it's primary function is to break.
Looks like I've got some inventing to do.
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Re: SWR trace always showing 1:1 as flat line at bottom of screen
Mine also. VNASaver is somewhat more in line with other tools. I''ve been wondering why, too.
Cheers, Ed -KT4ED
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On 2/18/2020 4:46 PM, RetroDude wrote: NanoVNA displays SWR values that are consistently much lower than shown on any of my outboard bridges.
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Nbridgema
Gyula Molnar
Wolfgang Kiefer
Larry Macionski
Oristo
Ohan Smit
DaveH52