Oristo - you were correct. The supplied cable was defective.
|
Re: Calibration standards
Hi Clyde Sorry the link was incomplete for a click. Copy this txt into your URL line of the browser and it works I am sorry this (bloody) io group chops of part of an URL. To those who want to comment: YES I KNOW SPACES ARE NOT WELLCOME BUT AS I HAVE MANY MANY DOCUMENTS THIS WAY, WHICH IS LINKED TO MANY MANY PLACES, I AM NOT PREPARED TO CHANGE MY DOCUMENTS. to May 2017 calibration kit.pdf Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af Clyde Spencer Sendt: 21. januar 2020 14:39 Til: [email protected]Emne: Re: [nanovna-users] Calibration standards Kurt, Thanks for the information. I tried the link you included in your conversation but it was "Link not found". i would be interested in looking at these SOL kits. *Clyde K. Spencer*
On Thu, Jan 2, 2020 at 10:12 AM Kurt Poulsen <kurt@...> wrote: Hello Ed
SDR-Kits has both SMA and BNC calibration kits which is documented.
Soon there will also be 5 parts N calibration kit The 4 parts BNC and
N kit is universal as being both male and female. Individual data for
each kit will be provided on a paper slip for BNC and N and also as
downloaded calibration kit file suited for the VNWA, which is a file
to read with a text editor for copy paste purpose.
For the SMA find the documentation in attached file or from my
homepage link below As the NanoVNA does not have facilities for
settings of calibration kit data (assumes ideal kit) the application
NanoVNA-saver by Rune Broberg has facilities for entering such
individual calibration kit data.
to May 2017 calibration kit.pdf If you
chose this way to get good quality calibration kit do not hesitate to
contact me for how to utilize the NanoVNA-saver facilities as there
are some details to consider with the NanoVNA-saver.
Kind regards
Kurt
-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Ed
Jones
Sendt: 2. januar 2020 14:59
Til: [email protected]
Emne: [nanovna-users] Calibration standards
I'm a newbie and my only experience with VNAs is borrowing a friend's
AIM
4170 from time to time for antenna measurements. I recently purchased
a NanoVNA-H and am waiting for it to arrive. I was thinking of
building some calibration standards for SMA and N (both sexes) but I
have almost talked myself out of it. I don't have access to a
precision VNA to accurately measure any standards that I build and I
don't think I can accurately measure the offset length to virtually
move the reference plane. For now, my needs only require measuring up
to 500MHz but it would be nice to go 1.2GHz in the future. My needs
are strictly amateur, but I would like the ability to accurately
measure home made phasing lines, power dividers, chokes, etc. Can
anyone recommend standards meant for amateurs that are of decent quality and come with measurement data?
Thanks!
--
Ed Jones - K8MEJ
|
On Mon, Jan 20, 2020 at 05:08 PM, Bob Albert wrote: 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
On Monday, January 20, 2020, 12:08:22 PM PST, Larry Rothman
<nlroth@...> wrote:
Bob, Folks, BEFORE attempting this - unsolder the +V line of the Nano's battery and put some tape on the lead so it doesn't short on anything!! For those of you how have a defective USB-C connector on your NanoVNA, with some careful soldering you can connect a cut-down USB2 extension cable to your device rather painlessly. Essentially, the biggest issue with repairing that surface mount USB-C connector is the pitch of the solder pads. However, looking at the attached photo, the USB + & - data lines are available on two vias - you just need to CAREFULLY scrape off the solder mask slowly and solder your USB data wires to those points along with GND and +5V to their locations. !! NOTE - NOTE !! - The +5V line runs along side those vias, so when you use a sharp tool to scrape off the solder mask as shown, cover over that long trace to prevent any shorts!!! I am not responsible for you destroying your PC's and Nano's USB interfaces because they got hit with 5V. (Max USB dataline voltage is 3V!!) Now, carefully tin the two copper via pads. Mechanically secure a cut-down USB cable or Type-A USB socket (can be short or long) to the Nano's PCB and connect the Ground and +5V lines. Check there are no shorts from either GND or +5V to the two data lines!! Tack solder the White (D- and Green D+) USB wires (typical colours in a USB2 cable) to the tinned vias. Again - check for shorts to +5v or Gnd and everywhere else - I'm not responsible for ham-fisted folks who can't solder. Reconnect the Nano's battery and power up to ensure everything works. Now - attach your Nano to your PC and the battery should charge. Turn on the Nano - if you see an UNRECOGNIZED DEVICE error on Windows - turn OFF and disconnect the Nano from the PC. Swap the two (white & green) dataline wires on the solder pads and repeat the above - the PC should recognize the Nano now. If not, you have other issue - like you scrapped off the copper off the PCB and severed the via trace or something else. This WILL work if done carefully. Alternately, if you have any old PC motherboards or other equipment that has a PC mounted Type-A USB socket, you can unsolder that and connect it to the NanoVNA by securing it mechanically to the rear cover - use lightly twisted wires to connect to the Nano. Enjoy!! ...Larry
|
Re: Calibration standards
Kurt,
Thanks for the information. I tried the link you included in your
conversation but it was "Link not found". i would be interested in looking
at these SOL kits.
*Clyde K. Spencer*
toggle quoted message
Show quoted text
On Thu, Jan 2, 2020 at 10:12 AM Kurt Poulsen <kurt@...> wrote: Hello Ed
SDR-Kits has both SMA and BNC calibration kits which is documented. Soon
there will also be 5 parts N calibration kit The 4 parts BNC and N kit is
universal as being both male and female. Individual data for each kit will
be provided on a paper slip for BNC and N and also as downloaded
calibration kit file suited for the VNWA, which is a file to read with a
text editor for copy paste purpose.
For the SMA find the documentation in attached file or from my homepage
link below
As the NanoVNA does not have facilities for settings of calibration kit
data (assumes ideal kit) the application NanoVNA-saver by Rune Broberg has
facilities for entering such individual calibration kit data.
to May 2017 calibration kit.pdf
If you chose this way to get good quality calibration kit do not hesitate
to contact me for how to utilize the NanoVNA-saver facilities as there are
some details to consider with the NanoVNA-saver.
Kind regards
Kurt
-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Ed
Jones
Sendt: 2. januar 2020 14:59
Til: [email protected]
Emne: [nanovna-users] Calibration standards
I'm a newbie and my only experience with VNAs is borrowing a friend's AIM
4170 from time to time for antenna measurements. I recently purchased a
NanoVNA-H and am waiting for it to arrive. I was thinking of building some
calibration standards for SMA and N (both sexes) but I have almost talked
myself out of it. I don't have access to a precision VNA to accurately
measure any standards that I build and I don't think I can accurately
measure the offset length to virtually move the reference plane. For now,
my needs only require measuring up to 500MHz but it would be nice to go
1.2GHz in the future. My needs are strictly amateur, but I would like the
ability to accurately measure home made phasing lines, power dividers,
chokes, etc. Can anyone recommend standards meant for amateurs that are of
decent quality and come with measurement data?
Thanks!
--
Ed Jones - K8MEJ
|
NanoVNA-Saver Data Quality Factor: is?
It looks like the data Quality Factor is best, lowest, when RL is greatest.
So, with data from a Butternut antenna resonance scan, what's that telling me?
Thanks...
--
Chuck, W5USJ
|
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
On Mon, Jan 20, 2020 at 02:42 PM, n2msqrp wrote: As others have mentioned it is Chinese New Year and they may be closed. I ordered my nanoVNA-H4 yesterday, and just received an email from Maggie saying the unit would not be shipped until after CNY. Points for good communication!
|
On Tue, Jan 21, 2020 at 07:12 PM, Glen K4KV wrote:
Hugen,
Thanks.? How do you save that, because the next time I turn it on, it
reverts back
Sorry for not saving temporarily, I will merge the latest code of edy555 as soon as possible. hugen
|
Hugen,
Thanks.? How do you save that, because the next time I turn it on, it reverts back
to the default.
73
Glen K4KV
toggle quoted message
Show quoted text
On 1/21/2020 05:00, hugen@... wrote: On Tue, Jan 21, 2020 at 07:22 AM, Glen K4KV wrote:
I have stuff to learn, like why the Smith reading is R and either
capacitive values or inductive values, not
R +xj (perhaps I needed polar selected).? Have not figured out how to
turn most of it off.? I want R + xj plus either
In NanoVNA-H4, you can modify the display format of the SIMTH chart through the menu "MARKER" ¡ú "SMITH VALUE".
hugen
|
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
On Mon, Jan 20, 2020 at 05:10 PM, hwalker wrote:
Changes to 0.4.5-12 (alias NanoVNA-H4_20200118)
1.GPT timer uses 2KHz
2.ADC IRQ level increased to 2
======================================================
After reading a post from hugen earlier in the day, I discovered that the same version hugen firmware for NanoVNA-H4 diverges from the NanoVNA-H (v3.4 and below) with increased marker functionality under the "MARKER" menu. I believe the increased marker functions were merged from edy555's latest firmware. The merges probably were easy to fit in the increased flash memory of the NanoVNA-H4, but not in the limited memory space of the NanoVNA-H.
- Herb
|
Re: SMITH CHART REACTANCE LINES.
On Tue, Jan 21, 2020 at 12:42 AM, johncharlesgord wrote:
I don't think that is correct (at least in the firmware version I am using, 0.4.0-3-ge04d3af). In the Polar S11 mode, the marker readout is the Real and Imaginary components of the reflected wave. If both are zero, the Z is 50 ohms + j 0 ohms, not 0 ohms + j 0 ohms.
============================================
John,
You are right, the polar format is not the correct solution. I have a second Nano-VNA-H with firmware 0.4.3Q it displays dual readouts with the correct values (see attachment). hugen posted earlier to day that the smith chart marker display format can be changed on the new NanoVNA-H4. I checked to see if the same is true for the firmware he released for the NanoVNA-H on the same day and it is not.
screen shot courtesy of NanoVNA-saver 2.2-1
- Herb
|
On Tue, Jan 21, 2020 at 07:22 AM, Glen K4KV wrote:
I have stuff to learn, like why the Smith reading is R and either
capacitive values or inductive values, not
R +xj (perhaps I needed polar selected).? Have not figured out how to
turn most of it off.? I want R + xj plus either
In NanoVNA-H4, you can modify the display format of the SIMTH chart through the menu "MARKER" ¡ú "SMITH VALUE". hugen
|
Re: SMITH CHART REACTANCE LINES.
Herb,
I don't think that is correct (at least in the firmware version I am using, 0.4.0-3-ge04d3af). In the Polar S11 mode, the marker readout is the Real and Imaginary components of the reflected wave. If both are zero, the Z is 50 ohms + j 0 ohms, not 0 ohms + j 0 ohms.
--John Gord
toggle quoted message
Show quoted text
On Mon, Jan 20, 2020 at 06:00 PM, hwalker wrote:
Just set one of the CH0 traces to "polar" format and you get R+/-JX display.
The NanoVNA was designed for hobbyist use and the majority prefer the pF and
nH format so they don't have to do the additional component conversion math.
But if you prefer polar display it is there for the choosing. You can make
your choice default by saving to memory location 0.
- Herb
|
Re: PAYING ALIBABA for ORDERS
I contacted Maggie and got the option to py via PayPal.me or direct using PayPal give her a message and explain so she can help you out.
|
Re: SMITH CHART REACTANCE LINES.
Exactly Dale !
73
Glen K4KV
toggle quoted message
Show quoted text
On 1/20/2020 8:15 PM, Dale Parfitt wrote: I think Glen's point was that labeling the reactance lines in pF and nH is breaking with history, industry standard and common sense. +/-JX is much more meaningful and intuitive than units of capacity and inductance.
Dale W4OP
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of David Eckhardt
Sent: Monday, January 20, 2020 7:53 PM
To: NANO VNA
Subject: Re: [nanovna-users] 4" H4 arrived
The only part of the Smith Chart that is purely resistive is the center
horizontal line. Upward is inductive and downward from that line is
capacitive. That's the advantage of the Smith Chart. Since the definition
of resonance is that +j = -j (the two cancel) only the central horizontal
line is purely resistive and shows resonance.
Dave - W?LEV
On Mon, Jan 20, 2020 at 11:22 PM Glen K4KV <glenk4kv@...> wrote:
FYI
Ordered via PayPal on Alibaba on 11th, arrived a little bit ago.
First impressions are very good. Very nice box.
Did a CAL using my own sma standards. Then checked 'known' good antennas.
Did not read the instructions, tried to see if it all was intuitive or not.
Was able to scan whatever I wanted to scan, all readings pretty much
what I expected.
Display crisp and very easy to read (hooray for 4"!)
Scanned some filters up to 310Mhz and saw no noise or other difficulties.
I have stuff to learn, like why the Smith reading is R and either
capacitive values or inductive values, not
R +xj (perhaps I needed polar selected). Have not figured out how to
turn most of it off. I want R + xj plus either
return loss or swr on the screen only for most of my needs.
All in all super bargain!
Thanks to all who have contributed!!!
73
Glen K4KV
|
Re: SMITH CHART REACTANCE LINES.
Just set one of the CH0 traces to "polar" format and you get R+/-JX display. The NanoVNA was designed for hobbyist use and the majority prefer the pF and nH format so they don't have to do the additional component conversion math. But if you prefer polar display it is there for the choosing. You can make your choice default by saving to memory location 0.
- Herb
|
Re: the nano android app issues
Forgot the image.....
On Mon, 20 Jan 2020 at 8:48 PM, Larry Rothman<nlroth@...> wrote: Yes, the android app sort-of doesn't need internet access, but it does because it was built using google tools and has google metrics crap in it. I use noroot firewall by greyshirts on my android devices (pipes all net access through the device's VPN API for filtering).?
If i allow the nano app network access, it starts immediately but if i don't allow access, the net portion of the call has to time out, then the app starts.?
Now, as for OTG access, install the Aida64 app and after you connect the nano to the tablet, see if Aida64 sees it under the Devices tab. You should see the nano's uid.pid in the list.?
I've attached what it should look like. It it does not appear, something else is going on. BTW, does the tablet use micro usb2 or usbc?
I hope this helps you troubleshoot your issue.?
... Larry
? On Mon, 20 Jan 2020 at 7:55 PM, nanovnauser@...<nanovnauser@...> wrote:? well a couple of things,1 i thought this was supposed to run without the internet and 2 yes my otg cable can? see and read a usb memory stick fine.
|
Re: the nano android app issues
Yes, the android app sort-of doesn't need internet access, but it does because it was built using google tools and has google metrics crap in it. I use noroot firewall by greyshirts on my android devices (pipes all net access through the device's VPN API for filtering).?
If i allow the nano app network access, it starts immediately but if i don't allow access, the net portion of the call has to time out, then the app starts.?
Now, as for OTG access, install the Aida64 app and after you connect the nano to the tablet, see if Aida64 sees it under the Devices tab. You should see the nano's uid.pid in the list.?
I've attached what it should look like. It it does not appear, something else is going on. BTW, does the tablet use micro usb2 or usbc?
I hope this helps you troubleshoot your issue.?
... Larry
On Mon, 20 Jan 2020 at 7:55 PM, nanovnauser@...<nanovnauser@...> wrote: well a couple of things,1 i thought this was supposed to run without the internet and 2 yes my otg cable can? see and read a usb memory stick fine.
|
Re: Improving the performance of a pre-V3.4 original Hugen nanoVNA
I second the motion on 90+% isopropyl alcohol. Maybe fluxes and flux removers have changed in the years since I last did a mass-produced RF product, but my past experience is that you want RF circuits to work properly, you clean them with isopropyl alcohol. This is based on measurements of phase noise and other parameters in UHF mobile devices.
toggle quoted message
Show quoted text
On January 20, 2020 10:13:01 AM PST, Bill <groups191227@...> wrote:
90%+ Isopropyl Alcohol on a cotton swab will make quick work of that flux.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
|
SMITH CHART REACTANCE LINES.
I think Glen's point was that labeling the reactance lines in pF and nH is breaking with history, industry standard and common sense. +/-JX is much more meaningful and intuitive than units of capacity and inductance.
Dale W4OP
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of David Eckhardt Sent: Monday, January 20, 2020 7:53 PM To: NANO VNA Subject: Re: [nanovna-users] 4" H4 arrived The only part of the Smith Chart that is purely resistive is the center horizontal line. Upward is inductive and downward from that line is capacitive. That's the advantage of the Smith Chart. Since the definition of resonance is that +j = -j (the two cancel) only the central horizontal line is purely resistive and shows resonance. Dave - W?LEV On Mon, Jan 20, 2020 at 11:22 PM Glen K4KV <glenk4kv@...> wrote: FYI
Ordered via PayPal on Alibaba on 11th, arrived a little bit ago.
First impressions are very good. Very nice box.
Did a CAL using my own sma standards. Then checked 'known' good antennas.
Did not read the instructions, tried to see if it all was intuitive or not.
Was able to scan whatever I wanted to scan, all readings pretty much
what I expected.
Display crisp and very easy to read (hooray for 4"!)
Scanned some filters up to 310Mhz and saw no noise or other difficulties.
I have stuff to learn, like why the Smith reading is R and either
capacitive values or inductive values, not
R +xj (perhaps I needed polar selected). Have not figured out how to
turn most of it off. I want R + xj plus either
return loss or swr on the screen only for most of my needs.
All in all super bargain!
Thanks to all who have contributed!!!
73
Glen K4KV
-- *Dave - W?LEV* *Just Let Darwin Work* *Just Think*
|
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
On Mon, Jan 20, 2020 at 04:18 PM, Lucio I?LYL wrote:
" NanoVNA-H4 updated Firmware to the latest version as follows.
0.4.5-12-gea578a2 "
=================================================
Changes to 0.4.5-12 (alias NanoVNA-H4_20200118)
1.GPT timer uses 2KHz
2.ADC IRQ level increased to 2
- Herb
|
Bob Benedict, KD8CGH
Kurt Poulsen
Chuck Carpenter
va3rr
Jim Allyn - N7JA