Re: Firmware compatibility
Hugen, Hurt,
I received my NanaVNA-H4 today and I can confirm the upper half blocks the USB. I filed away the upper rim. I did not want to force the USB cable into the receptacle fearing the stress may break the solder connections.
Mike N2MS
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On January 20, 2020 at 11:56 AM Kurt Poulsen <kurt@...> wrote:
Hi Hugen
Just got the NanoVNA-H4 delivered to day. I have some issues which I have raised to the manufacturer as the USB C entry is blocked by the upper half of the case (a rim is not milled away).
Then also there is stray lines as residual if previous traces and also single pixels of different colors is glowing. Eventually these disappear again when written sometime later, when a new trace is "passing by" else they are permanent.
Just to let you know if you do not know this or you know a fix.
The mechanical issue may be fixed by taking the unit apart and mill the excess part away if the case is easy to take apart. Anyway it look very fine and looking forward to try it out.
I have pictures if you are interested so mail me directly to kurt@...
Kind regards
Kurt
-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af hugen@...
Sendt: 20. januar 2020 04:18
Til: [email protected]
Emne: Re: [nanovna-users] Firmware compatibility
NanoVNA-H rev3.4 is fully compatible with previous versions of NanoVNA firmware.
The NanoVNA-H4 uses a Cortex-M4 MCU and a 4-inch LCD, so it is no longer compatible with previous firmware versions.
hugen
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Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Thanks Herb. None of my units will connect. Will try the on-line and see
what happens. Would be nice for field use though with my phone.
Merle
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On Mon, Jan 20, 2020 at 5:45 PM hwalker <herbwalker2476@...> wrote: Quite a collection Merle,
Are either of your other two NanoVNA's able to connect to your Samsung
Galaxy 8+? If so, then the nanoVNA-H4 should be able to connect by the
same means. If not, then the C-to-C able also will not work. The NanoVNA
android app is finicky regarding versions and android devices. The webapp
mostly works even when the Playstore apk will not, but you have to be
connected on-line.
- Herb
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Re: USB over CAT5 hardware
This is a good tip. Just remember that the feedline is only a multiple of a half wavelength at one frequency. If that's the center frequency of your antenna then the impedance at the end will be the same as at the antenna, ignoring the effects of attenuation. As you get further of the center frequency there will be some error in the result. This effect may not be important if the number of half wavelengths is not too high.
You can tell if your feed line length is right by measuring with a short at the antenna, assuming the short is not too long.
It is also possible to mathematically transform the result of the VNA to the antenna, but you need to know the impedance of the line, it's length, and possibly it's attenuation.
If it's a coax feedline and has a connector at the antenna you could do the VNA calibration at the antenna. For low frequency you can ignore whatever adapters it takes to use your Cal lot.
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Re: nanovna-saver cal panel won't fit gnome screen
Thanks for the responses.
The trick of using alt + left mouse only allows moving the window down.
There's also a mini-menu if you right click the title bar of the panel with
some promising sounding options including "move" and "resize" but they
don't get you to the bottom of the panel either.
However on another web search today I found a good tip on an Ubuntu site.
If you do alt-F7, you can move the panel any direction, including UP. It
allowed me to do the calibration and load & save results.
Kinda clunky though, so a revision that adds a scroll bar or makes the
panel shorter and fatter would be useful for us notebook users.
73-
Nick, WA5BDU
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On Mon, Jan 20, 2020 at 11:23 AM Nick <g3vnc@...> wrote: On Sun, Jan 19, 2020 at 03:09 PM, Nick Kennedy wrote:
Anyone got a suggestion for this? Hold down the Alt key then left click, drag the window.
HTH
Nick
G3VNC
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Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Quite a collection Merle,
Are either of your other two NanoVNA's able to connect to your Samsung Galaxy 8+? If so, then the nanoVNA-H4 should be able to connect by the same means. If not, then the C-to-C able also will not work. The NanoVNA android app is finicky regarding versions and android devices. The webapp mostly works even when the Playstore apk will not, but you have to be connected on-line.
- Herb
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Re: USB over CAT5 hardware
Oh! I should add, just for completeness,
1. After the antenna is matched (near 1:1 SWR) feed-line length doesn't matter (up to the point where matched-line loss is significant), and
2. Wind coax thru a toroid a few times to make a choke, near the antenna, so the shield of the coax, and the nano, are not part of the radiating structure.
73, --kv5r
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Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
On Mon, Jan 20, 2020 at 12:16 PM, David Eckhardt wrote:
" I have no problem with AliExpress¡"
====================================================
If you prefer AliExpress then you might try the link below. The Deepelec Store is the official retailer for the NanoVNA-f and have also partnered with hugen to sell the NanoVNA-H4. I am not associated and came across this information during a casual web search.
- Herb
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Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Received my H4 today and excellent packaging.
Two issues surfaced almost immediately.
1. H4 would not connect to my Samsung Galaxy 8+ with c to c cable provided.
Using the VNA app from cho45.
2. The female to female connector has one end plugged up. Cannot screw on
cable.
Tried a quick cal using a f to f connector from my original VNA and it
calibrated fine.
Now it is play time.
I now have the original VNA, VNA-F, VNA-H4
Merle
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On Mon, Jan 20, 2020 at 12:10 PM Lucio I?LYL <lucio.i0lyl@...> wrote: nanoVNA-H4 (using STM32F303CCT6 and 4-inch LCD) arrived today via UPS.
Now we need to study and understand the differences compared to the
previous version.
--
*73, Lucio I0LYL Rome, Italy*
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It's a USB C-port, the unpolarized type.? Very tiny pins, very close together.? I have the connector but not the ability to solder it in.
Bob
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On Monday, January 20, 2020, 12:08:22 PM PST, Larry Rothman <nlroth@...> wrote: Bob, Your unit that had the USB connector come off - was that a micro-USB or a USB-C part? Thanks,Larry? -? not Mike ;-) ? ? On Monday, January 20, 2020, 1:38:51 p.m. GMT-5, Bob Albert via Groups.Io <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:38:13 AM PST, Bob Albert <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:31:32 AM PST, Bob Albert via Groups.Io <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp <mstangelo@...> wrote: Bryan, Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
Mike,
You need to think about what you are seeing in the time domain.? What the software produces is the impulse response (the positive going blips) and the step response (the steps in your plot) of the network attached.? The steps are the result of multiple trips of a wave traveling through your cable.? The part you are asking about is the step response of your cable.? Consider the following.
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Re: Improving the performance of a pre-V3.4 original Hugen nanoVNA
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Re: USB over CAT5 hardware
Old-timer trick: A half-wave (and multiples thereof) of feed-line will "repeat" the feed-point impedance at the other end.
Take your frequency, and the velocity factor, and determine length of a half-wave, then make the line.
Then set the nano's sweep range close to the intended frequency (maybe +- 500kHz), and do an OSL calibration at the end of the feed-line (SO239-to-SMA adapter with the supplied SMA OSL's works fine at HF).
Then connect it to antenna and raise it to operating height. The nano should show the actual feed-point impedance of the antenna, just as if there were no feed-line between them.
73, --kv5r
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Try this:
- attach the nano to the problem pc and turn on in dfu mode
- open Devices from the control panel
- delete the nano usb device AND its driver that is showing it's in dfu mode
- turn off the Nano and try dfu mode again
- when Windows senses the device, it should request the dfu driver
- point it to the STM driver files (mentioned in the wiki) you installed.
NOTE: make sure you're using the right 32 or 64 bit drivers for your PC!
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On Monday, January 20, 2020, 3:28:15 p.m. GMT-5, brianbgarber via Groups.Io <brianbgarber@...> wrote:
Thank you so much for your patience with me! I wasn't able to get that to work on my laptop, however I tried a different computer and updated the nanoVNA without issue. So now I'm wondering if I need to delete the registry value on my laptop that corresponds to that device.
This is strange, but I'll chock it up to Windows!
Thanks again,
Brian
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It's a common problem. Search this forum for "STM device in DFU mode" using the Search box at top of page.
For some reason Windows sometimes replaces the driver "STM device in DFU mode" (for DfuSe Demo software) with the driver "STM32 BOOTLOADER mode" (for the ST-Link dongle).
The BOOTLOADER driver will not work with DFUse Demo.
Delete the BOOTLOADER driver (with Device Manager or USBDview) and then reinstall DFUse Demo software, it should put the "STM device in DFU mode" driver back (I think).
73, --kv5r
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Thank you so much for your patience with me! I wasn't able to get that to work on my laptop, however I tried a different computer and updated the nanoVNA without issue. So now I'm wondering if I need to delete the registry value on my laptop that corresponds to that device.
This is strange, but I'll chock it up to Windows!
Thanks again,
Brian
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PAYING ALIBABA for ORDERS
Even before the Chinese New Year, I cold not get my order paid. The
'error' message, rejection of my credit card, reflected they would accept
only a back transfer and displayed the instructions. I really don't care
for this type of financial transaction, especially with China. I have no
problem with AliExpress, just Alibaba. But the only place you can be sure
you are not paying for a clone is from Alibaba. Grrrrrrr...rrr....rrr.
Dave - W?LEV
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Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Even before the Chinese New Year, I cold not get my order paid. The
'error' message, rejection of my credit card, reflected they would accept
only a back transfer and displayed the instructions. I really don't care
for this type of financial transaction. I have no problem with AliExpress,
just Alibaba. But the only place you can be sure you are not paying for a
clone is from Alibaba. Grrrrrrr...rrr....rrr. I've emailed
Dave - W?LEV
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On Mon, Jan 20, 2020 at 7:42 PM n2msqrp <mstangelo@...> wrote: When I purchaed the nanaVNA-H4 I logged into the Alibaba website and send
her a message requesting information about purchasing via paypal. That is
how I got the instructions.
As others have mentioned it is Chinese New Year and they may be closed.
Mike N2MS
On January 20, 2020 at 10:14 AM "tom verra via Groups.Io" <mnv73= [email protected]> wrote:
I would like to purchase one using paypal..as others have done..sent two
emails to Maggie king with no response ?
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
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delete the wrong line Right-click to see the delete option.
then try DfuSE programming again.
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Bob,
Your unit that had the USB connector come off - was that a micro-USB or a USB-C part?
Thanks,Larry? -? not Mike ;-)
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On Monday, January 20, 2020, 1:38:51 p.m. GMT-5, Bob Albert via Groups.Io <bob91343@...> wrote: Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:38:13 AM PST, Bob Albert <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:31:32 AM PST, Bob Albert via Groups.Io <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp <mstangelo@...> wrote: Bryan, Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
Mike,
You need to think about what you are seeing in the time domain.? What the software produces is the impulse response (the positive going blips) and the step response (the steps in your plot) of the network attached.? The steps are the result of multiple trips of a wave traveling through your cable.? The part you are asking about is the step response of your cable.? Consider the following.
|
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
When I purchaed the nanaVNA-H4 I logged into the Alibaba website and send her a message requesting information about purchasing via paypal. That is how I got the instructions.
As others have mentioned it is Chinese New Year and they may be closed.
Mike N2MS
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On January 20, 2020 at 10:14 AM "tom verra via Groups.Io" <mnv73@...> wrote:
I would like to purchase one using paypal..as others have done..sent two emails to Maggie king with no response ?
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Bob,
I think you are mixing messages but I just purchased the NanoVNA-H-4 with the 4 inch screen. If you're considering another I would get this unit.
Mike N2MS
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On January 20, 2020 at 1:31 PM "Bob Albert via Groups.Io" < bob91343@...
wrote:
Mike,
Thanks for the information.? I did not buy the device because I have a
second nano that does okay.? But after reading your latest suggestion I
guess I'll buy the thing and see if I can upgrade without bricking the
unit.? It should also be a door to future upgrades.? Perhaps I can upgrade
the second nano via its USB port but that unit is flaky and turns itself
off without provocation.? It won't even turn on while the port is
connected, and sometimes even when not connected it fails.? Once on, I can
connect the port.? Then suddenly it behaves properly.
I did have thoughts of replacing the USB connector but it takes ability
that I lack.? I think over a dozen tightly spaced pins and limited access
and tools.
Bob
On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp < mstangelo@...
wrote:
Bryan,
Thanks. I thought it had to do with the mismatch between the coax and S11
port. I had a length of RG-6 handy and see the same effect with that 75
ohm cable and see the same effect. Since the loss of the Rg-6 is higher
the step responses is decreasing at a faster rate.
I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11
port, run a calibration using a 75 ohm load and run the test again.
Mike N2MS
Mike,
You need to think about what you are seeing in the time domain.? What the
software produces is the impulse response (the positive going blips) and
the step response (the steps in your plot) of the network attached.? The
steps are the result of multiple trips of a wave traveling through your
cable.? The part you are asking about is the step response of your cable.?
Consider the following.
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Merle W
Nick Kennedy
Brian Garber
Gyula Molnar