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Re: Upgrade firmware of NanoVNA H4 ---- what is the process?
Alton,
Everything you need is in the forum Wiki and File areas.? Print off a copy of the user guide and that will get you started.? There is a lot of information that has been created in the forum posts as well so do you the search tool and use hashtags as well.? Enjoy! On Sun, 24 May 2020 at 7:50 PM, ALTON MCCONNELL via groups.io<nu8l@...> wrote: Hello Everyone. Wonderful project! I received my H4 instrument about two weeks ago.? It was in a black box with gold printing with cables, cal stds, etc. I should upgrade the firmware to the latest.? I have version 0.5.0.? Build time Feb 21, 2020. Kernal 5.1.0. I am using a Levovo Thinkpad T500 with Win 10. What steps are required to update my firmware?? Does anyone have a step by step guide for anon-professional Win 10 user? Thanks! Alton, NU8L |
Re: Upgrade firmware of NanoVNA H4 ---- what is the process?
There is a pdf file in the files section like 2nd or third from the bottom
entitled how to write firmware for windows, it something similar On Sun, May 24, 2020, 18:50 ALTON MCCONNELL via groups.io <nu8l= [email protected]> wrote: Hello Everyone. |
Upgrade firmware of NanoVNA H4 ---- what is the process?
Hello Everyone.
Wonderful project! I received my H4 instrument about two weeks ago. It was in a black box with gold printing with cables, cal stds, etc. I should upgrade the firmware to the latest. I have version 0.5.0. Build time Feb 21, 2020. Kernal 5.1.0. I am using a Levovo Thinkpad T500 with Win 10. What steps are required to update my firmware? Does anyone have a step by step guide for anon-professional Win 10 user? Thanks! Alton, NU8L |
Re: NanoVNA
#calibration
On the previous question about why using the OPEN cal standard instead of nothing. The standard prevents the ingress of any stray RF that might be floating around.
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
Try this variant of firmware vs you card
Now for card init used low speed SPI bus (~280kHz) If not work, need try check Card slot pins, and card should be inserted as on foto Used pins: 2 - SD_CSAnd send logs All read/write after init go on max speed (36MHz), possibly it to big, datasheet say max speed = 25MHz |
Re: NanoVNA
#calibration
Larry and all,
I executed the calibration via app/Saver, and tried a bunch of filters, some reversed also. I enclose the scans. For less narrow filters, I enlarged the scan window, but I assume the impact from calibration should be minimal (as I think DiSlord said). <> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sun, May 24, 2020 at 12:28 PM Larry Rothman <nlroth@...> wrote: Radu,<> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> ![]()
E10.7X MX2 #1.jpg
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E10.7JA #3.jpg
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E10.7JA #4.jpg
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E10.7JA #2.jpg
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E10.7JA #1.jpg
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E10.7X MX2 #2.jpg
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SFE 10.7ML #1.jpg
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SFE 10.7ML #2 reversed.jpg
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SFE 10.7ML #2.jpg
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SFE 10.7MM #1.jpg
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SFE 10.7MM #2 reversed.jpg
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SFE 10.7MM #2.jpg
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SFE 10.7MZ #1.jpg
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SFE 10.7MZ #2.jpg
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Re: Homebrew sheilding
Yes I just made a former out of 1/4" thick 'Tufnol' that measured 34mm x
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13mm which is good for the two outer shields. Then using 0.005" thick brass foil I marked out the shapes of the shields 34mm x 13mm and added 4mm tall sides to fold down. (see pics) I carefully folded the foil over the former and bent the little tabs round over the ends and soldered the flaps down. Easy with ordinary soldering iron as the brass is so thin. Once the shields were fabricated I rubbed them back and forth on a smooth flat file to make sure all the sides were flush with the pcb. ie filed off any high spots. I then kept offering the shields to the pcb and marked out where I needed to file away the side to avoid the SMD components going to the audio codec. I then 'tinned' the edges with solder and tinned the 'fixing pads' on the board. Carefully lined up the shield and tinned one corner in place. Final adjustments and then soldered the other pads. Phew! Dave On Sun, 24 May 2020 at 19:22, Dave VE3LHO <dave@...> wrote:
Dave, |
Re: NanoVNA
#calibration
Radu,
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If you're using NanovnaSaver, use that app to perform and save the calibration and see if you get different results. I know that you can save a number of calls in the Saver app.? Larry On Sun, 24 May 2020 at 1:58 PM, Radu Bogdan Dicher<vondicher@...> wrote: Larry - I re-executed the calibration over 10.4 through 11MHz, saved to "1," and I always recall it before measuring. However, the letter changes every time I start the scan (from "C1" to "c1") - I press sweep, flop!, it changes. Not sure why, as far as I can tell I have the same settings on device and computer application (center: 10.7MHz, span: 600kHz), and I RECALL 1 it every time I prepare for scanning. David - yes, I am using 56.2ohm and 301ohms, 1% tolerance resistors. It's the closest I could come up with by calculating for minimum loss. The filters are 150kHz Muratas (JAs), but I also measured about four different bandwidths, and from multiple sources. I have at least 7 or 8 different batches and they all have the 5dB difference L/R. I think my calibration is not getting applied, based upon Larry's feedback above. Still trying to figure out how to maintain calibration settings while executing the scan. Thank you both, Radu. <> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sun, May 24, 2020 at 6:19 AM <david.hostetler@...> wrote:
What I see in the plot that you posted is a filter that is about 170 kHz |
Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
Excellent! Thanks again for all the hard work.
On Sun, 24 May 2020 at 10:27 AM, DiSlord<dislordlive@...> wrote: In my test i use Samsung EVO Plus 128Gb HD XL Samsung EVO Plus 32Gb SD HC Kingston MicroSD HC1 16Gb All worked, detected 128Gb flash not write (used exFat filesystem, not supported), but card answer and read sectors ok All others card answer and work My card powerup log on 1 screenshot SD_SendCmd err CMD0, 0xFF, 0x00000000My card powerup log on 2 screenshot CMD0 OkTry made several screenshots, possible card can`t powerup from first 2 commands |
Re: NanoVNA
#calibration
On run external program scan, calibretion data always rebuild, and use interpolation
Do not pay attention to it, if start stop freq some, no difference |
Re: NanoVNA
#calibration
I never change the frequency range (center/span) - at least, not
intentionally. I really only expect to be using this to sort IF filters, and for these a range from 10.4 to 11MHz or so works pretty well. If I leave everything alone and just insert a filter in my socket, the device seems to execute a spontaneous scan, "C1" stays in caps, and if I look on the device's screen, I still see the tilt (harder to read, as it's on the small device screen, but if on the left side the trace matches a horizontal grid line, on the right it goes right half way between two, and higher). If I run the scan from the Saver app, "C1" changes to "c1" but readings stay very much the same, as far as I can tell. <> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sun, May 24, 2020 at 11:13 AM Bill Cromwell <wrcromwell@...> wrote: Hi,<> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> |
Re: Homebrew sheilding
Dave,
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I am curious how you soldered (braized?) the brass shim. I've been thinking about making my own shields (not for my nano) but am a bit intimidated by my lack of experience with brass. Thanks, Dave L On Sat, May 23, 2020 at 07:04 AM, Dave B wrote:
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Re: NanoVNA
#calibration
Hi,
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I wonder if before recall a saved calibration we should do a reset first. 73, Bill KU8H On 5/24/20 1:58 PM, Radu Bogdan Dicher wrote:
Larry - I re-executed the calibration over 10.4 through 11MHz, saved to --
bark less - wag more |
Re: NanoVNA
#calibration
Big letter mean used calibration data stored in flash
If you change frequency, or use multisegment scan from NanoVNA saver or another program, calibration table rebuild and use interpolated values from main data Big 'C' mean not interpolated values Small 'c' interpolated In most cases mo matter, interpolation good work if start/stop freq range not big |
Re: NanoVNA
#calibration
Larry - I re-executed the calibration over 10.4 through 11MHz, saved to
toggle quoted message
Show quoted text
"1," and I always recall it before measuring. However, the letter changes every time I start the scan (from "C1" to "c1") - I press sweep, flop!, it changes. Not sure why, as far as I can tell I have the same settings on device and computer application (center: 10.7MHz, span: 600kHz), and I RECALL 1 it every time I prepare for scanning. David - yes, I am using 56.2ohm and 301ohms, 1% tolerance resistors. It's the closest I could come up with by calculating for minimum loss. The filters are 150kHz Muratas (JAs), but I also measured about four different bandwidths, and from multiple sources. I have at least 7 or 8 different batches and they all have the 5dB difference L/R. I think my calibration is not getting applied, based upon Larry's feedback above. Still trying to figure out how to maintain calibration settings while executing the scan. Thank you both, Radu. <> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sun, May 24, 2020 at 6:19 AM <david.hostetler@...> wrote:
What I see in the plot that you posted is a filter that is about 170 kHz |
Re: Calibration using Anritsu "tee"
#calibration
#solt
aparent1/kb1gmx
At HF the Anritsu tee is likely not going to be that much better a cal
as the supplied SOL. To test it cal with the ANritsu Tee and then measure the supplies SOL. Likely any difference you see will be due to the N to SMA adaptors adding length to the calibration plane. At upper UHF it may make a difference. Generally while good there is a finite level of accuracy available and you have to go to extremes to verify it. Allison ----------------- No direct email, it goes to bit bucket due address harvesting in groups.IO |
Re: Calibration using Anritsu "tee"
#calibration
#solt
You want to calibrate with as nearly to test jig configuration as possible.
For example, when measuring with alligator clips, I calibrate using alligator clips. |
Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
Hi DiSlord and Larry,
Thanks for all info. DiSlord,? I did flash the latest? 0.9.1 firmware initially, but to be sure and in case you updated the 0.9.1 release I loaded the one you gave me the link to and flasherd it, same result.?? When I have the memory card inserted in the NanoVNa and start "Terra Term" it immediately reports : SD_SendCmd err CMD0, 0xFF, 0x00000000 ?SD_SendCmd err CMD0, 0xFF, 0x00000000 CardType 0 And I also get a report from my system that a portable storage device has been connected to it.? So I'm afraid that , for some reason, my SD card that is marked MicroSD HC I (Capital i) 8 GB not is detected by your firmware. ? So I have to wait untill I receive the ordered new card and see what happens then. If it's not working either, I will buy one of your type of cards. Larry, thanks for your suggestion. Best regards Jos |
Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
My test SD cards foto
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