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Re: nano cases
There is you metal can, but that was designed to go in the can. Reworking the Nano to go in a can would be more of a pain, because the controles are not laid out in that format.
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I might get one of these for HF?? "portable" antenna measurements, wont work at UHF/VHF On 7/29/2019 11:00 AM, Dave Daniel wrote:
Sark 100 antenna analyser |
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Re: Best unit to purchase?
Ed,
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I got mine from Aliexpress vendor: It's a very nice unit, comes in a plastice case with all the attachments/cables/cal and has a battery. It took 21 days to Toronto, Canada. Check my previous posts. Cheers, Larry On Mon, Jul 29, 2019 at 11:06 AM, kg7swp@... wrote:
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Re: nano cases
Weird. I was just looking at an ad for that sold by StepIR in QEX magazine.
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DaveD Sent from a small flat thingy On Jul 29, 2019, at 10:47, Mike Brown <mbmail@...> wrote: |
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Re: nano cases
For what its worth I have a cheap & cheerful Sark 100 antenna analyser that
is in a metal case. Significantly bigger than the Nano but still convenient to hand hold. Not perfect but strong enough to hang from a feeder cable or survive fairly rough handling. Mike On Mon, 29 Jul 2019, 15:06 Dr. David Kirkby from Kirkby Microwave Ltd, < drkirkby@...> wrote: On Mon, 29 Jul 2019 at 13:32, Frank S <ka2fwc@...> wrote:I don't think it is worth putting a Pinto engine into a Cadillac |
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Re: Diles, Folders and Wikis on the nanovna group
See my comments inline, below.
Sent from a small flat thingy On Jul 29, 2019, at 10:10, Larry Rothman <ac293@...> wrote:I¡¯m not sure. The closest thing that I see to that is support for hash tags that allow posts to be associated together. I¡¯ll look to see if sticky posts are supported. Thank you. That topic might warrant it¡¯s own folder, as there are likely to be numerous documents about the designs that could be co-located. It strikes me that notes on cal procedures could also warrant a separate folder if they are distinct documents from the various owner¡¯s ¡°manuals¡±.
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Re: nano cases...
Personally, I'd rather see this instrument in a tablet size, something I can easily see; in a real metal box with Type-N connectors and sturdy switches and push-buttons. My need is for an instrument that I can carry to antenna sites for broadcast antenna work. I understand where some folks like tiny pocket size instruments, not sure why, but I'm probably going to go to something like an HP e5061B - a totally different area of an instrument. I like the 8753c or ES but they are pretty big and heavy for schleping to transmitter sites.
Burt, K6OQK At 05:32 AM 7/29/2019, Frank S wrote I don't think it is worth putting a Pinto engine into a Cadillac Escalade. It doesn't make it a pocket size antenna analyzer anymoreBurt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. biwa@... K6OQK -- Burt I. Weiner Associates Broadcast Technical Services Glendale, CA? U.S.A. K6OQK |
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Re: Diles, Folders and Wikis on the nanovna group
Dave,
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Does groups.io support 'sticky' posts that can be used to direct users to the various main areas of the forum? Also, I took the liberty of translating most of edy555's design notes for the NanoVNA and uploaded them in PDF format to the Misc folder in the files section. There are some good notes on his calibration methodology that Alan Victor and others may be interested in. Regards, Larry On Sun, Jul 28, 2019 at 11:14 AM, Dave Daniel wrote:
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Re: nano cases
Dr. David Kirkby from Kirkby Microwave Ltd
On Mon, 29 Jul 2019 at 13:32, Frank S <ka2fwc@...> wrote:
I don't think it is worth putting a Pinto engine into a Cadillac Yes, possibly a bit bigger than pocket size, but smaller than a Keysight FieldFox. It sill might fit in decent size pockets. I don¡¯t think it is much use in your pocket if it is broken! As with many things, different people have different opinions, and what is right for one person will not be for another. For me personally, I consider the construction quality to be too poor. Dave G8WRB --Dr. David Kirkby, |
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Re: nano cases
I don't think it is worth putting a Pinto engine into a Cadillac Escalade. It doesn't make it a pocket size antenna analyzer anymore
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On 7/29/2019 4:51 AM, Dr. David Kirkby from Kirkby Microwave Ltd wrote:
On Mon, 29 Jul 2019 at 06:17, kh6sky <kh6sky@...> wrote:These cases look nice and fulfill a need but my tendency to spasticallyI agree entirely. I think any case should extend out *everything* so you |
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Re: Possible location of latest VNA source code??
You may have pressed the touch screen while adc is initializing.
It might be better to add a wait. void adc_init(void) { rccEnableADC1(FALSE); /* Calibration procedure.*/ ADC->CCR = 0; while (ADC1->CR & ADC_CR_ADEN) ; ADC1->CR |= ADC_CR_ADCAL; while (ADC1->CR & ADC_CR_ADCAL) ; ADC1->CR = ADC_CR_ADEN; while (!(ADC1->ISR & ADC_ISR_ADRDY)) ; } On Sat, Jul 27, 2019 at 04:45 AM, Lapo Pieri wrote: On Sat, Jul 27, 2019 at 04:45 AM, Lapo Pieri wrote:
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Re: nano cases
Dr. David Kirkby from Kirkby Microwave Ltd
On Mon, 29 Jul 2019 at 06:17, kh6sky <kh6sky@...> wrote:
These cases look nice and fulfill a need but my tendency to spastically I agree entirely. I think any case should extend out *everything* so you never put any strain on the device apart from the screen, which I can see no way of avoiding. So I think these should be on a case 1) RF connectors - I would use N, not SMA, 2) USB 3) Toggle switch 4) Power switch For the LED, one could have 3 possibilities * Small hole * light pipe * desolder LED and run wire. For the battery, I guess one can get away with using the tracks on the If the plastic case were re-enforced around the USB connector it might help prevent disasters like mine. I personally don¡¯t think any amount of reinforcement is going to work as a long term solution. That will only delay the inevitable a while. Dave. Dave. -- Dr. David Kirkby, |
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Re: nano cases
These cases look nice and fulfill a need but my tendency to spastically knock stuff off the bench means I will use a larger metal box with switches and connectors moved to the outer box. The power and control switches seem too delicate to last. Another reason to put the unit in a box is the delicate USB connector. If the plastic case were re-enforced around the USB connector it might help prevent disasters like mine. On my white Gecko first NanoVNA purchase, the USB connector came loose from the circuit board on the first day. This weakness was also pointed out in the documentation when the NanoVNA was sold as a kit. This was really not easy to fix as some of the traces were pulled from the board, though I did manage with some microscope aided soldering. When my black version arrives, I want to get it into a larger box as soon as I verify it works. You can purchase a small USB extender cable that mounts easily to the outer box. I bought one for my uBitX project.
Perhaps the printed case might be improved by addition of a tongue or bracket that the USB cable could be affixed to. Any sort of strain relief on that connection should be welcomed. Most of you may get by without destroying your USB connection, but for those like me suffer from the dropsies, I suggest you do something to protect that connector. Jim |
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Re: Correct button?
You are correct and I confirmed on the big box, that is the function performed.
This turns CAL ON or OFF. Again, I suspect hp as well others, added this function as an aid to be sure the correction data sets make sense as a corrective measurement is conducted on a component. Its much easier to do this then preset the instrument and have to do a complete re calibration. Alan ________________________________ From: [email protected] <[email protected]> on behalf of alan victor <avictor73@...> Sent: Monday, July 29, 2019 1:20 AM To: [email protected] <[email protected]> Subject: Re: [nanovna-users] Correct button? Good suggestion and it does appear to toggle in that manner. Now, I have to think why I would toggle corrections ON and OFF, other than to see if the corrections ON make sense. I am not sure this is a good place to bring up the fact that the STANDARDS provided with the nanoVNA are taken, I believe, by the device and the firmware as IDEAL. Point in fact, they are NOT. Not an issue at lower frequencies unless you want to split hairs. But as you approach 900 MHz, bottom line, when measuring a component, you are not going to get the correct answer. I emailed the developer on this topic but as of now, no response. Alan ________________________________ From: [email protected] <[email protected]> on behalf of Roger Henderson <hendorog@...> Sent: Monday, July 29, 2019 1:10 AM To: [email protected] <[email protected]> Subject: Re: [nanovna-users] Correct button? I would guess it is a mode switch between: 'Apply calibration corrections' and 'Don't apply calibration corrections' This feature is present in other VNA's. Am not in front of a device to confirm it though. Regards, Roger On Mon, 29 Jul 2019 at 13:06, alan victor <avictor73@...> wrote: Good question Ernst. Let me take a look and see if I can figure it out. I |
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Re: Correct button?
Good suggestion and it does appear to toggle in that manner.
Now, I have to think why I would toggle corrections ON and OFF, other than to see if the corrections ON make sense. I am not sure this is a good place to bring up the fact that the STANDARDS provided with the nanoVNA are taken, I believe, by the device and the firmware as IDEAL. Point in fact, they are NOT. Not an issue at lower frequencies unless you want to split hairs. But as you approach 900 MHz, bottom line, when measuring a component, you are not going to get the correct answer. I emailed the developer on this topic but as of now, no response. Alan ________________________________ From: [email protected] <[email protected]> on behalf of Roger Henderson <hendorog@...> Sent: Monday, July 29, 2019 1:10 AM To: [email protected] <[email protected]> Subject: Re: [nanovna-users] Correct button? I would guess it is a mode switch between: 'Apply calibration corrections' and 'Don't apply calibration corrections' This feature is present in other VNA's. Am not in front of a device to confirm it though. Regards, Roger On Mon, 29 Jul 2019 at 13:06, alan victor <avictor73@...> wrote: Good question Ernst. Let me take a look and see if I can figure it out. I |
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Re: Correct button?
I would guess it is a mode switch between: 'Apply calibration corrections'
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and 'Don't apply calibration corrections' This feature is present in other VNA's. Am not in front of a device to confirm it though. Regards, Roger On Mon, 29 Jul 2019 at 13:06, alan victor <avictor73@...> wrote:
Good question Ernst. Let me take a look and see if I can figure it out. I |
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Re: Correct button?
Good question Ernst. Let me take a look and see if I can figure it out. I have a guess that it may have to do with the fact that the standards, open, short, load are NOT perfect. But... the softkey selection does not lead to additional menu selection. So far now, it appears to be a PLACE HOLDER for further work.
Alan ________________________________ From: [email protected] <[email protected]> on behalf of dk1vi <dk1vi@...> Sent: Sunday, July 28, 2019 11:44 PM To: [email protected] <[email protected]> Subject: [nanovna-users] Correct button? Hi, what is the purpose of the "CORRECT" button in the calibration menu? I have not read anything about it or did I miss something? Ernst |
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Re: LabView Interface
Joe Smith
I uploaded a short video clip showing the current status of my LabView interface.? It's not ready for prime time yet.?
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Link is on the EEVBLOG site, same as before. On Saturday, July 27, 2019, 8:34:11 PM CDT, Joe Smith via Groups.Io <joeqsmith49@...> wrote:
I now have both channels sorted out.? Took a little time away from the project? to have a fresh look.?? I've posted a couple of updated pictures.?? There still some work to do but the basics are working now.? "www.eevblog.com/forum/rf-microwave/nanovna-custom-software/new/#new" NanoVNA Custom Software - Page 1 | | |? | NanoVNA Custom Software - Page 1 NanoVNA Custom Software - Page 1 | | | ? ? On Friday, July 26, 2019, 12:08:06 PM CDT, Joe Smith via Groups.Io <joeqsmith49@...> wrote: ? I started to look at the "data 1" array to implement S21.?? So far, no luck.? Like the "data 0" array, it appears to send two different arrays that are interlaced.? ? One thing I did run into when I first tried it, the communications was not reliable. ? It seems that sending the two commands "data 0 data 1" too quickly can cause the VNA some distress.? Adding some delay between commands appears to have solved it. ?? ? On Wednesday, July 24, 2019, 4:15:55 PM EDT, Joe Smith via Groups.Io <joeqsmith49@...> wrote: ? Thanks for taking the time to dig up all those links.??? The first link uses the included Smith chart.? This is what I show in my screen shot.?? This works but I really want some basic features like cursors.??? The others appear to use the same method I have done in the past, basically overlaying graphics on an X-Y.?? This is the direction I am planning once again as looking at NI's site, it appears they have nothing new to offer.?? ? On Wednesday, July 24, 2019, 3:38:11 PM EDT, Larry Rothman <ac293@...> wrote: Would this help? An Old Friend in New Clothes:Smith Charts in LabVIEW ? Proceedings of the 2013 ASEE North Central Section Conference ? Copyright ? 2013, American Society for Engineering Education OFNC1 ? ? There are also: ? ? ? ? ? I hope these help you and others. Cheers, Larry |
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Correct button?
Hi,
what is the purpose of the "CORRECT" button in the calibration menu? I have not read anything about it or did I miss something? Ernst |
Burt K6OQK
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