On Mon, Sep 30, 2019 at 03:09 PM, Kurt Poulsen wrote:
Hi Again Erik
This time by creating a new mail I succeded
basic knowledge about a transmission line.pdf
<
on%20line.pdf>
Kind regards
Kurt
Hi Kurt many thanks for sharing the documents related to transmission line and calibration kits. I have a lot to learn about it. In the workplace I used VNA for years, but I was focused on developing programs to automate measurements. I had experience with hp8510C, hp8753D . I remember the satisfaction I experienced the first time I completed the Calibration procedure and subsequent verification with verification kit in 2.4mm on the first attempt. Best Regards IZ1MDJ Maurizio
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paul.riggott wrote ...
"Now that seller does not have anything to sell, looks as if it was a scam."
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I count over 50 different items still for sell on his eBay store ( ).
If it is a scam whoever bought one will be in good company as he has sold over a hundred nanoVNA's, and they shouldn't have any problems getting a refund from eBay if that many complaints start pouring in.
On the other hand, this seller ( ) at $17 I wouldn't touch with a 10 foot pole. Limited number of feedbacks, all feedback has almost identical wording, delivery date could be as long as 6th Dec.
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Another eBay 'seller' - look for item# 362769877272 Now $17US
Probably a hijacked account.
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Re: NanoVNA V2 own build with the results
Hi Erik,
congrats! But one fundamental question: Why do you connect the output of your bridge with an oscillator? (a joke or a mistake ?)
Another question: You have 3 mixers, but only two audio channels. ???
73, Wolfgang DH1AKF
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Or he had just a few "seconds" to sell and with all the attention he got from this thread they sold out quickly! :-)) Roy WA0YMH On Mon, Sep 30, 2019, 10:23 AM paul.riggott via Groups.Io <paul.riggott= [email protected]> wrote: Now that seller does not have anything to sell, looks as if it was a scam.
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Re: NanoVNA V2 - I vote for a larger instrument...
As for remote control via smartphone, a simple way to do it would be to
leave the USART2 pins available for external serial connection (that is PA2
and PA3), from there, an external additional bluetooth serial adapter
(HC-06 for instance) would make the commands available to a smartphone.
Currently PA2 and PA3 and used for the switches, but I can see that other
I/O pins are available.
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On Mon, Sep 30, 2019 at 10:05 AM n2msqrp <mstangelo@...> wrote:
I would like to have the option of controlling my VNA via a smartphone or
a tablet.
I believe this is the way the industry is going for portable
instrumentation.
I saw two examples this summer.
The Army Corps of Engineers is surveying the beaches here in New Jersey
for coastal erosion. The GPS receiver is mounted on a pole with the antenna
on top and the data was collected on a tablet. This remote interface was
handy because the receiver mounted on the pole had to be placed in the surf.
I had a service call with Comcast to replace a faulty cable box. The tech
used a test set which was controlled and monitored with his smartphone. He
used it to check signal levels at various points, some with were tight and
he could analyze in a comfortable position instead of crouching down.
The MetroVNA and Sark VNA have bluetooth, it shoulc be included in the
next version of nanaVNA.
Mike N2MS
On September 29, 2019 at 5:20 PM Burt K6OQK <biwa@...> wrote:
Once again, I vote for a larger version. As I
said earlier, I would like one to be tablet size
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Now that seller does not have anything to sell, looks as if it was a scam.
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Re: Is there an Android app for the NanoVNA?
Oh, sorry - I saw that you already have tried the WebUSB application. What about grabbing the Python copy of Rune's Saver app and trying to run it on an implementation of Android Python? I've already looked around for Android centric VNA apps - not much out there. was: >>Check this out: /g/nanovna-users/message/1429
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Is there an Android app for the NanoVNA?
Is there an Android app for the NanoVNA, perhaps something similar to blueVNA from
Dan Toma YO3GGX that performs perfectly with the mrs VNA?
Dan has advised that he has too many other projects at the moment to embark on another.
The cho45/NanoVNA-Web-Client works fine for me on Windows but fails to connect on both my Android tablet and phone.
73 Bob GM4CID
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Re: This is the most active group/list I subscribe to
Dave,
There are so many messages because the nanaVNA is a technology disrupter, a piece of test equipment at a great price that a ham or hobbyist can use and experiment with.
You have a delete key.
I vote for keeping the messages and ideas coming. As new versions are developed new groups are being formed.
Mike N2MS
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On September 29, 2019 at 9:01 PM "Dr. David Kirkby from Kirkby Microwave Ltd" <drkirkby@...> wrote:
I am on about a dozen different groups for various things
There¡¯s more messages from this group than any other - and possibly all the
others combined. ????
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Re: Si5351A max fundamental frequency
Thanks!
If at all possible please make it so, that the max usable fundamental frequency (MUFF) can be set through the USB also, e.g. from NanoVNA-Saver.
Bo
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Re: Si5351A max fundamental frequency
Due to cheap chines manufacturing one may expect out of spec SI5351 to be used so having a firmware where one can set the max SI5351 fundamental frequency does make sense.
I will submit a request to edy555
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I agree a little wider trace would be good.?? Also can the data scaling factor limits be floating point rather than fixed point (whole numbers).? For example, when scaling VSWR I would like to have choice of maximum values of 1.5 instead of 2.
Thanks Rude for best nanovna pc software.
--
Dave, WB5NHL
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On 9/30/2019 7:05 AM, W5DXP wrote: Thanks Rune, it's working well now. The only change I would make is to make the traces on the graphs a little wider. Thanks again, Cecil at w5dxp.com
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Re: NanoVNA V2 - I vote for a larger instrument...
I would like to have the option of controlling my VNA via a smartphone or a tablet.
I believe this is the way the industry is going for portable instrumentation.
I saw two examples this summer.
The Army Corps of Engineers is surveying the beaches here in New Jersey for coastal erosion. The GPS receiver is mounted on a pole with the antenna on top and the data was collected on a tablet. This remote interface was handy because the receiver mounted on the pole had to be placed in the surf.
I had a service call with Comcast to replace a faulty cable box. The tech used a test set which was controlled and monitored with his smartphone. He used it to check signal levels at various points, some with were tight and he could analyze in a comfortable position instead of crouching down.
The MetroVNA and Sark VNA have bluetooth, it shoulc be included in the next version of nanaVNA.
Mike N2MS
toggle quoted message
Show quoted text
On September 29, 2019 at 5:20 PM Burt K6OQK <biwa@...> wrote:
Once again, I vote for a larger version. As I
said earlier, I would like one to be tablet size
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Re: Si5351A max fundamental frequency
Hi
I have tried the nanoVNA_800_aa_20190802.dfu F/W too. The trace is the same as the NanoVNA-H__800_ch_20190924.dfu.
I strongly believe that when approaching 300 MHz, with the fundamental frequency, the NanoVNA doesn't work properly which the below spectrum plots also show. Is there a F/W that goes to e.g. 266 2/3 MHz and then has a max of 800 MHz, or 250 MHz/750 MHz...? If so I would love to try it.
Unfortunately I can't use the 8753 these days - maybe next week. But, I have measured the LPF using my signal generator and spectrum analyzer, and there is no abrupt change in the attenuation.
Bo
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I know -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af Dr. David Kirkby from Kirkby Microwave Ltd Sendt: 30. september 2019 15:26 Til: [email protected]Emne: Re: [nanovna-users] New document On Mon, 30 Sep 2019 at 14:09, Kurt Poulsen <kurt@...> wrote: Hi Again Erik
This time by creating a new mail I succeded
basic knowledge about a transmission line.pdf No, that failed I know some might argue filenames are less readable, but if you use underscores or hyphens rather than spaces, you will never have this problem. Kind regards
Kurt
Dave -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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Re: Cal-Kit Standards' Definitions
Hi Jeff All my (I think more than 100) are in the folder ..../VNWA/ not accessible as such I have an old promise to create a list but I am continuously on a new job about calibration so it will come some time when And by the way my homepage suffers serious of age too the steam pressure has lowered ? Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af Jeff Anderson Sendt: 30. september 2019 15:15 Til: [email protected]Emne: Re: [nanovna-users] Cal-Kit Standards' Definitions On Mon, Sep 30, 2019 at 05:57 AM, Kurt Poulsen wrote: Here is another handy document of general interest <> basic knowledge about a transmission line.pdf I still have a problem to create it as html Hm.... Hi Kurt, Here's the link (I hope!): <> By the way, if I go to your top page, <> , I don't see this PDF listed in the contents. Did I miss it? - Jeff, k6jca
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Re: Cal-Kit Standards' Definitions
Hi Erik My Outlook 2019 sucks ? Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af erik@... Sendt: 30. september 2019 15:14 Til: [email protected]Emne: Re: [nanovna-users] Cal-Kit Standards' Definitions On Mon, Sep 30, 2019 at 05:57 AM, Kurt Poulsen wrote: <> basic knowledge about a transmission line.pdf <> Interesting example on how to get rid of the remaining osculation due to fringe C/L of the calibration load
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Re: errors of "error" models
Dear gin&pez,
Thank you very much for taking the time to reply to my questions.
I must apologize -- it is clear that my questions were too vague. I hope you will allow me to ask them in a clearer fashion.
To improve my understanding "facupov", I would like to understand:
1. For the Open and Short standards, in what terms (or parameters) do you define each standard's two uncertainties?
(I will note that Keysight (formally Agilent, formally Hewlett-Packard) defines the Open and Short uncertainties each in terms of a single parameter: angle of the Reflection Coefficient. How are your two parameters of uncertainty related to the manufacturer's definition of uncertainty in terms of a single parameter, Reflection Coefficient angle?)
2. For the Load standard, in what terms (or parameters) do you define its single uncertainty?
(I will note that Keysight defines its Load-standard uncertainties in terms of rho (rho being defined as the magnitude of the Reflection Coefficient). Therefore, the range of possible values for the Load can be pictured on a Smith Chart as being those values whose Reflection Coefficients are bounded by a circle, centered at 0,0, whose radius is rho. And so I would think that a Load would have two uncertainties, defined in terms of the magnitude and the angle of its Reflection Coefficient, rather than a single parameter of uncertainty.)
I hope my questions help you to understand why I am confused. Thank you again for taking the time to reply. I very much appreciate your efforts.
Best regards,
- Jeff, k6jca
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Re: Cal-Kit Standards' Definitions
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Wolfgang Kiefer
Jose Luu
Bo, OZ2M
Dave Kjellquist, WB5NHL
Kurt Poulsen
Oristo