Re: nanovna saver display
Did you change the sweep on the nano or using NanoVNA-saver. I think you need to do the latter.
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Kurt and Herb,
I fixed the stray display artifacts left by moving markers. Please give a try and let me know if there is still any issue.
Ken
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Re: A Good source for Calibrated Loads in formats other than SMA -
#calibration
Maury Microwave is another good source of high quality CAL standard sets.
But they are also "not cheap".
Dana
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Re: Anyone had news from Maggie King?
Got a reply yesterday from Maggie K, so I sent paypal and now another message from a Sophia Lu saying they got my money but where is my order..So I sent Sophia a copy of the message I got from Maggie.. Their ordering is not as straight forward as Ebay or Amazon.. That's for sure.
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Hello,
Sorry, I am sure this has been asked and answered before....
Using saver last night.? Calibrated 1.8 to 30M and saved as my HF cal.? Swept some antennas that are
multi-band.
When I changed the sweep to concentrate on 80M, the graphs stayed on the 1.8 to 30Mhz ranges, instead
of my new short sweep.? In other words, the graphed results were a tiny slice of the entire display.
How do I get the graphed ranges to match the new sweep range?
73
Glen K4KV
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Re: Wireless control of NanoVNA
Hi
You can do this already by attaching the NanoVNA to a raspberry pi running NanoVNA Saver and access same Raspberry via VNC
This is how I do some trials now
Cheers
Daniel
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Re: how can I get the raw data of (magnitude, phase) ?
Hi Hwalker,
Reset calibrations on nanovna works with nanovna-saver + n type calibrators with know oslt modell values. I get best result this method. But many manuals says for best result calibrate nanovna and calibrate external program. This is simply not ok. Hard to understand the correct method to avarega users.
Tricky part, in hungarian locale decimal dot is comma. Currently, nanovna saver oslt values with comma not uderstand and swith back to ideal oslt model without message.
Best way will be separate calibrations to nanovna and external programs. With dot works well user with user definied oslt values.
Currently another problem on nanovna oslt model values cannot defined. Delays for open short, fringing capaticance no way to set. N type calibrators usually have different offset for shor and open.
73,
Lajos
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Re: A Good source for Calibrated Loads in formats other than SMA -
#calibration
But they say they are "Precision" :-)
(I am being a sarcastic of course) The vast majority of inquirers are now studying this profession, so please humor the proposition. Whoever asks well knows the answer already. 73, Gyula HA3HZ
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Yes, but for the VNA, you do not want that common ground point to be externally located, out in the thing being measured.
I'm still not understanding the reason for keeping the grounds "floating", in a numerical way. Like, maybe the S21 isolation comes up x dB at some frequency, with some test. I assume this data is around? Bob
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Re: how can I get the raw data of (magnitude, phase) ?
On Wed, Feb 19, 2020 at 10:24 AM, <pgc1682@...> wrote:
From QRP:
"added scanraw command (allows to read raw gamma data for unlimited point count with no calibration apply)"
====================================================================================
If you turn off calibration and send a "data" command, aren't the same raw gamma data values returned as the scanraw command except for only 101 points?
- Herb
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I was in error. I have so many applications that I confused it with
others. There is no hook for arithmetic in Saver.
I do wish there was a hook to set the center of the Smith Chart and other
presentations in a normalized manner, unity. Then, when one calibrated in
something other than 50-ohms, one just multiplies the normalized value by
the impedance in which the cal was completed. As it is, even when the cal.
standard is 300 ohms, the center of the chart and other data is presented
as though it were 50-ohms. One must multiply by a scaling factor factor
between 50-ohms and the cal. value. If the cal. value is 300 ohms, that
factor is 300 / 50 = 6. If the cal. value is 12.5-ohms, that scaling
factor is 12.5 / 50 = 0.25. This is a consequence of the chart and other
displays being 'locked in' to an (assumed) 50-ohm system.
Dave - W?LEV
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On Tue, Feb 18, 2020 at 4:51 PM goscickiw <goscickiw@...> wrote: On Mon, Feb 17, 2020 at 08:39 PM, David Eckhardt wrote:
I believe there is a place in Saver for a multiplier or
arithmetic. Can you tell me where it is exactly? I can't find it.
I tried changing the 50 ohms to 300 ohms in the Saver calibration
standards and doing the calibration in the program with 300 ohm load, but
despite showing the impedance correctly, it still shows the SWR wrong, as
if it was for 50 ohms. It only shows the SWR correctly when I calibrate
with a 300 ohm load with the standard set to 50 ohms in program, but then
it shows the impedance wrong.
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
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Re: Android app cable not working!
Joerg, thank you maybe that is the "simple thing" preventing this?
Would this otg adapter cable suffice, do you think?
amazon.com/Cable-Matters-2-Pack-Adapter-Inches/dp/B00GM0OZ4O
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On Wed, Feb 19, 2020 at 11:20 AM Joerg-ex DB2OO <exDB2OO@...> wrote:
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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Sharing a common ground and being bonded together are two, different, things. In circuit layout it is not uncommon to keep the ground in several circuit sections separate until they are brought together at a single point. This helps to eliminate ground loops within the circuit. - Ed
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Re: Anyone had news from Maggie King?
I ordered a Hugen Nanovna H4 on 25 Jan and received a note, same date, from Maggie that is would be shipped after Feb 4.
Next received an SMS on 18 Feb and it arrived yesterday (Sydney, Australia).
It powers up but I won't have a chance to test it until next week.
Alan
--
Alan VK2AMC
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Re: Android app cable not working!
Yes, pins 4 & 5 are shorted on the micro USB to tell the phone or tablet to switch to host mode and supply 5V output.
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On Wednesday, February 19, 2020, 2:50:02 p.m. GMT-5, Mike Murphree N4MHO <mike@...> wrote: IIRC, the only difference in an OTG cable is a jumper between two pins of the connector that plugs into the phone or tablet. Mike N4MHO On Wed, Feb 19, 2020 at 10:20 AM Joerg-ex DB2OO <exDB2OO@...> wrote: 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: Android app cable not working!
I just tested it successfully with a Galaxy S9 running Android 10 and the NanoVNA WebApp.
After you have connected the NanoVNA via USB OTG and the cable, that came with the NanoVNA, just start the App.
You will get a question, that needs to be confirmed.
Please see on the other picture the connections.
--
Joerg, EX-DB2OO
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Re: Android app cable not working!
IIRC, the only difference in an OTG cable is a jumper between two pins of
the connector that plugs into the phone or tablet.
Mike N4MHO
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Show quoted text
On Wed, Feb 19, 2020 at 10:20 AM Joerg-ex DB2OO <exDB2OO@...> wrote: 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: A Good source for Calibrated Loads in formats other than SMA -
#calibration
But they say they are "Precision" :-)
(I am being a sarcastic of course)
Gedas, W8BYA EN70
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
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On 2/19/2020 2:31 PM, pgc1682@... wrote: Hi,
This calibrators not professional/precision/lab quality. I see older N calibrator kit. No electrical lenght, fringing capatinace, etc. definied. Nanovna-saver have menu for set the calibrator values.
HP, Kirkby Microwave, Hubers Suhner, etc. well designed precision kits. But not cheap.
73,
Lajos
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Re: A Good source for Calibrated Loads in formats other than SMA -
#calibration
Hi,
This calibrators not professional/precision/lab quality. I see older N calibrator kit. No electrical lenght, fringing capatinace, etc. definied. Nanovna-saver have menu for set the calibrator values.
HP, Kirkby Microwave, Hubers Suhner, etc. well designed precision kits. But not cheap.
73,
Lajos
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Re: Wireless control of NanoVNA
Hi,
I have succes with nanovna and wifi. But have problems. I have old wifi router, TP-LINK MR-3220 V1.2. Firmware changed to Openwrt 17.01.7. USB ACM kernel module installed too. Ser2net packages installed to router. Currently maually add rights to /dev/ttyACM0, I not know why not work automatically.
Nanovna-saver not see the COM port on windows, but manually entered and now works. Now cable less nanovna working with nanovna saver.
I like the wireless vna-s. No cable = no big loss, no common mode current problem, etc.
Not nanovna, but the trick:
73,
Lajos
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Gary W9TD
Larry Macionski
Gyula Molnar
Mike Murphree N4MHO