It's best to measure the capacitor at the frequency of interest, especially
as that frequency increases. For a "sticker value", use a low frequency -
1 MHz or less. As the frequency increases, parasitic inductance becomes
more and more evident which cancels some of the effective capacitance.
Dave - W?LEV
toggle quoted message
Show quoted text
On Sun, Feb 20, 2022 at 2:52 PM Joe WB9SBD <nss@...> wrote: What is a typical stimulus range for measuring a Cap?
If it makes any difference it is a 500pf cap, and is used between 3.5
and 4 Mhz.
Should I set the stimulus rage for those values?
And the measurement should be taken when the smith chart tracer thing is
right at the bottom like 6 O'clock position correct?
Joe WB9SBD / W9ET
--
*Dave - W?LEV*
*Just Let Darwin Work*
|
Re: Proper way to measure length of _Window_Line_?
On Sun, Feb 20, 2022 at 07:01 AM, Jim Lux wrote: - Or, you can mathematically transform measurements made assuming 50
ohms into measurements using some other impedance. The NanoVNA won't do
this, but other software can.
Jim - DiSlord has added the capability to change the system impedance for measurements in his recent firmware. It is under the Display menu.. Roger
|
Re: NanoSaver on ubuntu- mint
I'm sorry, I do not understand what you are trying to say.
You expect for NanoVNASaver to start on its own when you
plug in the NanoVNA?
toggle quoted message
Show quoted text
On Sun, 20 Feb 2022 at 11:37, Francesco <realfran@...> wrote: Yes, I install libreVNA with is on software and work, I cheek on
Mint/Ubuntu and give me the list of usb ports, I plug the NanoVNA and give
me the Cypress USB driver is installed, *I give more detall* : when I plug
the USB cable from the NanoVNA the Saver software not open, when I unplug
the cable open up, the problem is NanoSaver software don't open the USB
port.
I tray to put this information on the terminal but not result.
One other information I never use software terminal on my life.
Thank you for the help the only think I doing is "copy and past on the
terminal".
Best regards.
Francesco.
*Sent:* Sunday, February 20, 2022 at 3:39 AM
*From:* "Dragan Milivojevic" <d.milivojevic@...>
*To:* [email protected]
*Subject:* Re: [nanovna-users] NanoSaver on ubuntu- mint
AFAIK Saver does not support LibreVNA
On Sat, 19 Feb 2022 at 10:24, Francesco <realfran@...> wrote:
Hello, I install LibreVNA and work, I use the USB port for different
device and work, the only problem is NanoVNA-Saver is installed but not
find the the serial/usb device.
*Sent:* Saturday, February 19, 2022 at 4:36 AM
*From:* "Dragan Milivojevic" <d.milivojevic@...>
*To:* [email protected]
*Subject:* Re: [nanovna-users] NanoSaver on ubuntu- mint
On Sat, 19 Feb 2022 at 01:22, Francesco <realfran@...> wrote:
Hello, I set up one laptop with Mint Linux "cinnamon" I install NanoVNA
Saver I don't find the "device port" get a problem with the LiteVNA and the
NanoVNA V2 plus4.
Please some help, I'm computer illiterate and this is the first time I use
Linux (I'm lost) I install a lot of Python libraries and I get confused
with the " CONSOLE "
|
If you're new to the Nanovna, please read the beginners guide in the files section. There are other reference guides there too.?
I wrote a? console command guide that explains all the serial (usb) command structures. It has not been updated in 2 years but covers most commands. It has been used by a number of developers to create apps that interface with the Nanovna.?
The version 2 and newer Nanovnas use a binary command structure. I do not think there is a document for them yet so you will have to go through the open-source firmware to see those.?
On Sun., 20 Feb. 2022 at 8:16 a.m., zahi666@...<zahi666@...> wrote: Hi,
I'm new to nanovna, I want to use it to get the return loss.
How can I get it? I'm using c# and rs232 communication.
Thanks,
Zahi
|
Re: Proper way to measure length of _Window_Line_?
On 2/20/22 6:43 AM, WB2UAQ wrote: Do I understand this correctly from this discussion? For every Zo a balun or transformer is required for that specific Zo? One for 100 ohm cat 5, one for 300 ohm TV twin lead, another for 600 ohm ladder line and another for 450 ohm window line, etc.?
Not really - there's two aspects to this: 1) Different characteristic impedance - You could calibrate with 300 ohm load, short, and open and directly measure 300 ohm lines (or 75 ohm lines, etc.)? The S parameters will be correct, but anything which turns that into Z won't necessarily be right (because the formula needs the calibration impedance. - Or, you can mathematically transform measurements made assuming 50 ohms into measurements using some other impedance. The NanoVNA won't do this, but other software can. 2) Balanced to unbalanced transformation - This is more about "how accurate do you want to be?" The NanoVNA is a unbalanced system, but it's also tiny. It's also (in usual situations) not "connected to ground" so the unbalance shouldn't affect much (i.e. it's a two terminal device, the balanced transmission line is a two terminal device, there's no way to "know" that it's not balanced)
|
Re: Unit Won't turn on after charging
OK, I will try this. Thanks for all your help.
|
What is a typical stimulus range for measuring a Cap?
If it makes any difference it is a 500pf cap, and is used between 3.5 and 4 Mhz.
Should I set the stimulus rage for those values?
And the measurement should be taken when the smith chart tracer thing is right at the bottom like 6 O'clock position correct?
Joe WB9SBD / W9ET
|
Re: Proper way to measure length of _Window_Line_?
Do I understand this correctly from this discussion? For every Zo a balun or transformer is required for that specific Zo? One for 100 ohm cat 5, one for 300 ohm TV twin lead, another for 600 ohm ladder line and another for 450 ohm window line, etc.?
|
Re: New H4 User and PC Software Question
On Sun, Feb 20, 2022 at 08:47 AM, Donald S Brant Jr wrote:
I still have my laminated Smith Chart that you can draw on with grease pencil
or erasable marker. I also have a copy of Smith's book, bought from Smith
himself.
With that, my Dietzgen slide rule, my grid dip meter, and my copies of "Radio
Engineering" and "Radio Engineer's Handbook" by Terman I am ready for The Big
One.
My copy of "Electronic Applications of the Smith Chart" is from the re-publisher Krieger (they're in town, so it was new, but "damaged" surplus), my Terman is third edition, and my Smith charts are an inch thick stack of paper blanks (the red and green version) from when the company I was working for was going to throw them in the dumpster. My slide rule is a version made by Collins Radio Company that I picked up at a hamfest maybe 20 years before I went to work for them. ___________ Bob - W4ATM -? 35 miles south of the Kennedy Space Center Retired RF Engineer now playing with all the hobbies I never had the time for.
|
Re: New H4 User and PC Software Question
Sounds like we¡¯re from the same era! Gene K1AVE (1956) From: Donald S Brant Jr<mailto:dsbrantjr@...> Sent: Sunday, February 20, 2022 8:47 AM To: [email protected]<mailto: [email protected]> Subject: Re: [nanovna-users] New H4 User and PC Software Question I still have my laminated Smith Chart that you can draw on with grease pencil or erasable marker. I also have a copy of Smith's book, bought from Smith himself. With that, my Dietzgen slide rule, my grid dip meter, and my copies of "Radio Engineering" and "Radio Engineer's Handbook" by Terman I am ready for The Big One. 73, Don N2VGU
|
Re: New H4 User and PC Software Question
Bob,
as Larry wrote, please use the mouse buttons on the graphical interface when using the NanoVNA App.
This will give you more setting options. Unfortunately, you can't read much more on my website either,
because the creator of the program created it for your own use and shared it in its current state to display NanoVNA and
even more VNAs on your computer.
--
Gyula HA3HZ (more info )
|
Re: New H4 User and PC Software Question
I still have my laminated Smith Chart that you can draw on with grease pencil or erasable marker. I also have a copy of Smith's book, bought from Smith himself.
With that, my Dietzgen slide rule, my grid dip meter, and my copies of "Radio Engineering" and "Radio Engineer's Handbook" by Terman I am ready for The Big One.
73, Don N2VGU
|
Zahid,
There have been many messages regarding return loo in the forum.?
You should be able to use the search function and search for "return loss" and you will find a lot of info that has been covered.?
If you go to the forum Wiki (link at the end of each email) refer to the very first item regarding searching.?
Hi,
I'm new to nanovna, I want to use it to get the return loss.
How can I get it? I'm using c# and rs232 communication.
Thanks,
Zahi
|
Hi,
I'm new to nanovna, I want to use it to get the return loss.
How can I get it? I'm using c# and rs232 communication.
Thanks,
Zahi
|
Re: NanoSaver on ubuntu- mint
Yes, I install libreVNA with is on software and work, I cheek on Mint/Ubuntu? and give me the list of usb ports, I plug the NanoVNA and give me the Cypress USB driver is installed, *I give more detall* : when I plug the USB cable from the NanoVNA the Saver software not open, when I unplug the cable open up, the problem is NanoSaver software don't open the USB port. I tray to put this information on the terminal but not result. One other information I never use software terminal on my life. Thank you for the help the only think I doing is "copy and past on the terminal". Best regards. Francesco. *Sent:* Sunday, February 20, 2022 at 3:39 AM *From:* "Dragan Milivojevic" <d.milivojevic@...> *To:* [email protected]*Subject:* Re: [nanovna-users] NanoSaver on ubuntu- mint AFAIK Saver does not support LibreVNA
On Sat, 19 Feb 2022 at 10:24, Francesco <realfran@...> wrote: Hello, I install LibreVNA and work, I use the USB port for different
device and work, the only problem is NanoVNA-Saver is installed but not
find the the serial/usb device.
*Sent:* Saturday, February 19, 2022 at 4:36 AM
*From:* "Dragan Milivojevic" <d.milivojevic@...>
*To:* [email protected]
*Subject:* Re: [nanovna-users] NanoSaver on ubuntu- mint
On Sat, 19 Feb 2022 at 01:22, Francesco <realfran@...> wrote:
Hello, I set up one laptop with Mint Linux "cinnamon" I install NanoVNA
Saver I don't find the "device port" get a problem with the LiteVNA and the
NanoVNA V2 plus4.
Please some help, I'm computer illiterate and this is the first time I use
Linux (I'm lost) I install a lot of Python libraries and I get confused
with the " CONSOLE "
|
Re: NanoSaver on ubuntu- mint
AFAIK Saver does not support LibreVNA
toggle quoted message
Show quoted text
On Sat, 19 Feb 2022 at 10:24, Francesco <realfran@...> wrote: Hello, I install LibreVNA and work, I use the USB port for different
device and work, the only problem is NanoVNA-Saver is installed but not
find the the serial/usb device.
*Sent:* Saturday, February 19, 2022 at 4:36 AM
*From:* "Dragan Milivojevic" <d.milivojevic@...>
*To:* [email protected]
*Subject:* Re: [nanovna-users] NanoSaver on ubuntu- mint
On Sat, 19 Feb 2022 at 01:22, Francesco <realfran@...> wrote:
Hello, I set up one laptop with Mint Linux "cinnamon" I install NanoVNA
Saver I don't find the "device port" get a problem with the LiteVNA and the
NanoVNA V2 plus4.
Please some help, I'm computer illiterate and this is the first time I use
Linux (I'm lost) I install a lot of Python libraries and I get confused
with the " CONSOLE "
|
Re: Unit Won't turn on after charging
Ok, try this...
Put the unit into dfu mode (hold in jog SW and turn on with usb cable connected) and see if the computer sees it's in dfu.?
On the H4, the LCD is dark during dfu mode.?If the PC recognizes it in dfu mode, push in new fw.?
On Sat., 19 Feb. 2022 at 3:41 p.m., Brady Nelson<tbradynelson@...> wrote: My board says v4.2.1. Unfortunately I don't have an oscilloscope right now to check the xtals.
|
Re: New H4 User and PC Software Question
On Sat, Feb 19, 2022 at 04:52 PM, VK2CZ DAVID wrote:
Hello Bob,
The neat Smith Chart analysis & Simulation tool titled "SimSmith"
integrates to my NanoVNA... It runs on multiple OS. Suggest you take a
look at that, as it beats pencils and a calculator on a Smith Chart poster
print.
David VK2CZ
Life Senior Member IEEE
My whole intent was to import S parameter files into SimSmith - I've been using it for years. I have a small collection of both S1P files and CSV files I exported from my one port analyzer (AIM4170) and little things I've done with it. I just downloaded a more recent version of SimSmith, but in my rush to learn the NanoVNA didn't think of that road, just getting back to where I am now. Bob -- ___________ Bob - W4ATM -? 35 miles south of the Kennedy Space Center Retired RF Engineer now playing with all the hobbies I never had the time for.
|
Have been using my nanoVNA-H to tune my antennas for the lower bands in ham radio for over a year. It has been a lifesaver! I started to use it recently and it seemed to complete the calibration procedure successfully. I saved the calibration and then connected the antenna to be tested. There was no sweep just one small dot at the lower lefthand point of the screen. Has my unit died or have I inadvertently changed some setting deep in a menu somewhere? I tried pausing and unpausing the sweep but that made no difference. Has anybody experienced anything like this with their unit? Thanks, Stephen KO4CVU
|
Re: New H4 User and PC Software Question
Hello Bob,
The neat Smith Chart analysis & Simulation tool titled "SimSmith"
integrates to my NanoVNA... It runs on multiple OS. Suggest you take a
look at that, as it beats pencils and a calculator on a Smith Chart poster
print.
David VK2CZ
Life Senior Member IEEE
toggle quoted message
Show quoted text
On Sun, 20 Feb 2022, 03:47 montanaaardvark, <boblombardi@...> wrote: I've subscribed to this group for a long time but never posted. I only
bought my first NanoVNA last weekend. I bought an H4 for the larger
screen. Everything seems to be working fine. I had an issue updating the
firmware to DisLord's latest version from December, but that was Windows 10
being itself. I got that fixed and updated the firmware. I have a
one-port antenna analyzer that I can compare its measurements to and
everything seems close enough to be confident with it.
My question concerns PC software with it. I downloaded NanoVNA App after
reading the Wiki, but since it doesn't have any documentation, can't find
out ways to do things I'd like to do. I don't think it's possible with
this, so any pointers are appreciated. Including if any other piece of
software does these things better.
Simplest one first, I'd like to save the plots to S-parameter files. Is
that possible?
Is it possible to change the displays from Log Mag to magnitude and angle
or R and jX?
On NanoVNA app, I see how to push the VNA settings onto the app, but I
don't see how to push the app's settings onto the VNA. Is that possible?
Thanks,
Bob
___________
Bob - W4ATM - 35 miles south of the Kennedy Space Center
Retired RF Engineer now playing with all the hobbies I never had the time
for.
|
Roger Need
HA3HZ
Donald S Brant Jr
Francesco