Searching ebay.co.uk has the same issue, no cases just nanovna units themselves.
I made my own metal box, so not an issue for me.
Maybe the vendors have placed a .com or regional listing condition on them.
73 de Andy
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Re: Simple example of interfacing Octave with nanoVNA
#octave
On Tue, Dec 17, 2019 at 05:57 AM, <bryburns@...> wrote:
On Mon, Dec 16, 2019 at 02:17 PM, <erik@...> wrote:
You need to load the instrumentation library
To clarify how to load the instrumentation library use the Octave command:
"pkg load instrument-control" from the Octave command-line prompt. But don't
use the quote marks.
--
Bryan, WA5VAH
Hi to all , I've solved the problem . The instrument-control pakage was installed. The mistake is that I was using the COM14 , that need a different sintax like hCom = nanoOpen("\\\\.\\COM14") instead of original sintax hCom = nanoOpen("COM14:") To avoid this problem , I cleaned the register to free the not used COM port. Many thanks for the support Maurizio IZ1MDJ
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Re: Some test results using a NanoVNA
Hi Bob,
It's interesting, and the translator translated it, I just had to put "space" in the right places.
Still very understandable, thanks for the summary.
73, Gyula HA3HZ
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Re: Simple example of interfacing Octave with nanoVNA
#octave
On Mon, Dec 16, 2019 at 08:57 PM, <bryburns@...> wrote:
,,, To clarify how to load the instrumentation library use the Octave command:
"pkg load instrument-control" from the Octave command-line prompt. But don't use the quote marks.,,,
=================================================================================
You can also let your script load the instrumentation library by entering, pkg load instrument-control, at the beginning of the script. Refer to: .
- Herb
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Re: Simple example of interfacing Octave with nanoVNA
#octave
On Mon, Dec 16, 2019 at 02:17 PM, <erik@...> wrote:
You need to load the instrumentation library
To clarify how to load the instrumentation library use the Octave command: "pkg load instrument-control" from the Octave command-line prompt. But don't use the quote marks. -- Bryan, WA5VAH
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I was tought early on that all things mechanical were considered FTF.
That is file to fit...
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Show quoted text
On 12/15/2019 9:00 AM, Frank S wrote: I had 3d printed some cases and some people were happy, some were not. Seems these things are all not the same and sometimes you need to shave some of the holes to make it fit -- John Ferrell de W8CCW "We must never become too busy sawing to take time to sharpen the saw." Source: Ergonomic Trends
--
John Ferrell W8CCW
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Re: Some test results using a NanoVNA
My message was gargled beyond recognition by whatever stupid software handled it.? <sigh>
Bob
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Show quoted text
On Monday, December 16, 2019, 03:30:53 PM PST, Bob Albert via Groups.Io <bob91343@...> wrote:
I too have been enjoying the amazing capabilities of this little jewel.? I now find that I can measure most parameters of passive components and networks with excellent accuracy.
I can measurecapacitanceESRESLinductanceresistancedelayphase angleSWRimpedanceself resonant frequencyQcrystal parameterscoaxial cable parameters:?characteristic impedance?electrical length?propagation constant?capacitance?inductance?lossesconnector capacitanceinductance of wiresfilter parameters:?pass band?stop band?matching impedanceantenna parameters:?SWR?resonant frequency?bandwidth?spurious resonances?impedance?line lengthspectrum analysis, sort ofCW frequency
Probably more, as I haven't exhausted the possibilities yet.
Most measurements come within a percent or two of that reported by my expensive bridges.? When there is discrepancy, I often can trace it to the use of a different test frequency.? Testing electrolytic capacitors isn't too satisfactory, as they are pretty much worthless at any frequency the nanoVNA uses.? However the readings can be useful, showing how important it is to bypass an electrolytic capacitor for high frequency.
I have two nanoVNAs just to make sure I can still use one if the other breaks.? My old fashioned fancy expensive boat anchor VNAs are still handy for frequencies beyond the nano's capabilities.
Anyone with questions about how to set it up to measure any of this, feel free to ask.
Bob K6DDX
? ? On Monday, December 16, 2019, 02:07:34 PM PST, DuWayne Schmidlkofer <duwayne@...> wrote:
I recently updated my blog with two posts showing the measuement results I have obtained using a NanoVNA.
one shows the response of a multiband HF antenna.? The latest one shows the response of a step attenuator I recently built.
I must say that I am more than pleased with the results I have been able to obtain with such an inexpensive instrument.
It has been interesting following some of the discussions about calibration and the math involved with the VNA, but I am more interested in what people are using? it for real world applications.
--
DuWayne? KV4QB
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Re: errors of "error" models
GIN&PEZ;
I am very much familiar with the feeling of "cautious optimism", and I completely respect, appreciate, and support your careful scrutiny of the process details. I am looking forward to reviewing your results, and replicating them independently.
--
73
Gary, N3GO
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Re: errors of "error" models
@Gary O'Neil , N3GO - 17 December 2019 /g/nanovna-users/message/8292Dear Gary, Thank you. Well, we are now proceeding carefully, step-by-step, by multi-checking and cross-verifying the results with all available independent procedures, including the [NanoVNA] internal one, as well as both of these you are mentioning, because our two experimental two-ports are consisting of DC Resistive Taus, with a third one being under construction, having in our minds to demonstrate all possible cases by three, representative, as much as possible, practical applications - if it is possible at all, of course, since we don't know and we will see. Anyway, up to now all of the results are too encouraging - permitting a cautious optimism - but we will see. #78'' : #78' was re-corrected 20 November 2019 /g/nanovna-users/message/7272#80: [S]-parameters from [Z]-parameters 2 December 2019 /g/nanovna-users/message/7657Best regards, gin&pez@arg
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Re: errors of "error" models
GIN & PEZ;
Congratulations on your success reported in Post 8255 (#82).
Were the equations in posts 7272 (#78 twice corrected) & 7657 (#80) the ones used to perform your verification?
--
73
Gary, N3GO
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Re: Some test results using a NanoVNA
I too have been enjoying the amazing capabilities of this little jewel.? I now find that I can measure most parameters of passive components and networks with excellent accuracy.
I can measurecapacitanceESRESLinductanceresistancedelayphase angleSWRimpedanceself resonant frequencyQcrystal parameterscoaxial cable parameters:?characteristic impedance?electrical length?propagation constant?capacitance?inductance?lossesconnector capacitanceinductance of wiresfilter parameters:?pass band?stop band?matching impedanceantenna parameters:?SWR?resonant frequency?bandwidth?spurious resonances?impedance?line lengthspectrum analysis, sort ofCW frequency
Probably more, as I haven't exhausted the possibilities yet.
Most measurements come within a percent or two of that reported by my expensive bridges.? When there is discrepancy, I often can trace it to the use of a different test frequency.? Testing electrolytic capacitors isn't too satisfactory, as they are pretty much worthless at any frequency the nanoVNA uses.? However the readings can be useful, showing how important it is to bypass an electrolytic capacitor for high frequency.
I have two nanoVNAs just to make sure I can still use one if the other breaks.? My old fashioned fancy expensive boat anchor VNAs are still handy for frequencies beyond the nano's capabilities.
Anyone with questions about how to set it up to measure any of this, feel free to ask.
Bob K6DDX
toggle quoted message
Show quoted text
On Monday, December 16, 2019, 02:07:34 PM PST, DuWayne Schmidlkofer <duwayne@...> wrote:
I recently updated my blog with two posts showing the measuement results I have obtained using a NanoVNA.
one shows the response of a multiband HF antenna.? The latest one shows the response of a step attenuator I recently built.
I must say that I am more than pleased with the results I have been able to obtain with such an inexpensive instrument.
It has been interesting following some of the discussions about calibration and the math involved with the VNA, but I am more interested in what people are using? it for real world applications.
--
DuWayne? KV4QB
|
Re: New version of NanoVNA-Saver: 0.2.1
Hi Lajos How are calibration directly at the female adaptor of the VNA using the short and load standard only omitting the open standard ?? If you are using my female calibration setting with test cables and using the NanoVNA supplied female female adaptor you do get poor calibration due to loss in this adaptor Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af pgc1682@... Sendt: 16. december 2019 22:17 Til: [email protected]Emne: Re: [nanovna-users] New version of NanoVNA-Saver: 0.2.1 Hi Ron, Thanks the reply, that could be the problem. Many clones exist, maybe my Hugen like (not know) device calibrators not same than others. I try use nanovna default 50fF C0 or data from Kurt example. Nowadays I can not get good calibrations. Avarege only calibration currently I have. 73, Lajos
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Some test results using a NanoVNA
I recently updated my blog with two posts showing the measuement results I have obtained using a NanoVNA.
one shows the response of a multiband HF antenna. The latest one shows the response of a step attenuator I recently built.
I must say that I am more than pleased with the results I have been able to obtain with such an inexpensive instrument.
It has been interesting following some of the discussions about calibration and the math involved with the VNA, but I am more interested in what people are using it for real world applications.
--
DuWayne? KV4QB
|
Re: Simple example of interfacing Octave with nanoVNA
#octave
Hi , many thanks I reinstalling the Octave , and I will check the version of the instrument control pakage.
In my previus installation I've the 3.0 version.
My nanovna is using COM14 , there is special instruction to employ a number port more than 9 ?
Maurizio IZ1MDJ
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Re: New version of NanoVNA-Saver: 0.2.1
Hi,
From Kurt very good measurement with good calibrated s1p file used, I interpolate several point. Original data is 101 point. See the attachment, what's happening if I modify the points to 100, 101, 102 and 1011 point. Original 101 point data very good, interpolated data not.
I think interpolation also affects the accuracy of the calibration.
73,
Lajos
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Re: New version of NanoVNA-Saver: 0.2.1
Hi Ron,
Thanks the reply, that could be the problem. Many clones exist, maybe my Hugen like (not know) device calibrators not same than others.
I try use nanovna default 50fF C0 or data from Kurt example. Nowadays I can not get good calibrations. Avarege only calibration currently I have.
73,
Lajos
|
Re: Simple example of interfacing Octave with nanoVNA
#octave
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Re: Simple example of interfacing Octave with nanoVNA
#octave
Hi Erik , I tried to use the Octave code , but i'snt works.
Wich version of Octave are you using , and wich OS.
May be my version of Octave 5.1.0.0 on win7 is not supporting the serial function.
any suggestion ?
Many thanks
73 de IZ1MDJ
Maurizio F.
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Re: New version of NanoVNA-Saver: 0.2.1
Lajos, I'm NO expert on NanoVNAs, but I believe the difference you are seeing is due to 2 factors:
1. the total Over All Length of the 2 parts
or
2. the different dilectric constant of the 2.
ron
N4UE
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Re: New version of NanoVNA-Saver: 0.2.1
Hi,
Great idea the higher resolution graph on nanovna saver. I mesured the very non ideal indoor 40 band antenne. The goal construct special tuner to shift 20 meter band electrically. I sweeep 6-15Mhz with osl calibration on nanovna, and nanovna saver calibrated too 10x101 point = 1010 point for better resolutuion. I re check calibration on nanovna and nanovna-saver, which is good. Open, shor, load good small point.
See attached images. With Sim Smith Chart original 1010 point segmented sweep has ripple. Original sweep now reduced to 101 point. Now ripple disappeared, of course the some detail too. Use 1:1 view on picture viewer, small ripple exist if not original size displayed.
101 point data useful on low memory nanovna and for beginnniers. For advanced users i think segmented method very useful on nanovna-saver. It will be more precise if use raw data from nanovna. I not know how to nanovna works, I see QRP firmware has a scanraw command. I think this is what we need. I think raw option is useful, but not for all user. So checkbox required.
I have calibration errors, i will send it next message. For calibration, interpolation beetween real calibration causes a strange error.
73,
Lajos
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Gyula Molnar
gin&pez@arg
Kurt Poulsen
DuWayne Schmidlkofer
