I am thinking about getting a nanovna, is the Mac operating system usable with them.
I am expecting to use it in place of my MFJ 259A. Will it be everything I wish it would be?
If I get a heads up here, please be patient with me.
73,
Craig W9OD
Happy is the nation whose God is the Lord.Ps 33:12
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Welcome to the group, Loren!
Please review information in the forum WIKI and File areas.
There are a number of user guides available in those areas. (files or links)
Although there are over 14000 posts try using the search function before posting questions - many times, others have already asked and there are good answers available.
If you do need to ask a question - please be as specific as you can.
Cheers,Larry
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On Wednesday, June 17, 2020, 3:16:37 p.m. EDT, Loren Moline WA7SKT <lmoline@...> wrote: Sorry. This was my first post. Please excuse me. I just joined. Loren Moline WA7SKT Benson, AZ DM41ux ________________________________ From: [email protected] < [email protected]> on behalf of Larry Rothman <nlroth@...> Sent: Wednesday, June 17, 2020 12:11:55 PM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] NanoSaver Yes - please read up on it in the forum Wiki area - there is a pile of info there you should review before posting the same question 3X in the forum messages. Look at the bottom of any forum email you receive - the links are there. ? ? On Wednesday, June 17, 2020, 3:06:08 p.m. EDT, Loren Moline WA7SKT <lmoline@...> wrote: Does this software run on Windows 10 or do you have to download more software? Loren Moline WA7SKT Benson, AZ DM41ux
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Sorry. This was my first post. Please excuse me. I just joined. Loren Moline WA7SKT Benson, AZ DM41ux ________________________________ From: [email protected] < [email protected]> on behalf of Larry Rothman <nlroth@...> Sent: Wednesday, June 17, 2020 12:11:55 PM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] NanoSaver Yes - please read up on it in the forum Wiki area - there is a pile of info there you should review before posting the same question 3X in the forum messages. Look at the bottom of any forum email you receive - the links are there. On Wednesday, June 17, 2020, 3:06:08 p.m. EDT, Loren Moline WA7SKT <lmoline@...> wrote: Does this software run on Windows 10 or do you have to download more software? Loren Moline WA7SKT Benson, AZ DM41ux
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Yes - please read up on it in the forum Wiki area - there is a pile of info there you should review before posting the same question 3X in the forum messages.
Look at the bottom of any forum email you receive - the links are there.
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On Wednesday, June 17, 2020, 3:06:08 p.m. EDT, Loren Moline WA7SKT <lmoline@...> wrote:
Does this software run on Windows 10 or do you have to download more software?
Loren Moline WA7SKT
Benson, AZ
DM41ux
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Yes it does. I have the latest updates from MS.
Gary
AA5I
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Does this software run on Windows 10?
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Does this software run on Windows 10?
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Does this software run on Windows 10 or do you have to download more software?
Loren Moline WA7SKT
Benson, AZ
DM41ux
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Don't do this
The input of the CH1 mixer is DC decoupled so an ohm meter will measure a
wrong value. Actually, it looks that this can be done and the CH1 50 Ohm to be measured just fine. Specifically fot the H4 the schematic shows that this can be done (nanoVNA switched off of course) ->
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On Tue, Jun 16, 2020 at 06:33 PM, <david.hostetler@...> wrote:
You could always try verifying the CH1 resistance with an ohm meter,
Don't do this The input of the CH1 mixer is DC decoupled so an ohm meter will measure a wrong value. -- NanoVNA Wiki: /g/nanovna-users/wiki/homeNanoVNA Files: /g/nanovna-users/filesErik, PD0EK
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Re: New H4 Model Received from R & L Electronics
I did not test the S-A-A (V2) sub-850 MHz vs NanoVNA (bad clone), but at 850-950 MHz, the S-A-A is way beter. Also way better than Tom Bayer's VNWA. Attached two measurements from the same antenna. Note that for the S-A-A, I did not have the right parameters for the cal kit. I did a little bit of tweaking to make the curves approximately similar. But look at the noise and spike levels of the VNWA compared to the smooth lines of the V2! Too bad I did not take the same measurement with my NanoVNA.
Reinier
Op 17-6-2020 om 00:05 schreef hwalker:
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On Tue, Jun 16, 2020 at 10:02 AM, Phil Royce wrote:
reason why I ask is I need to model 1900mhz antennas and the current NANOvna I have from the original builder/designer does not go that high, and the current H4 does not also. So is there a reason I would not want to go with the SAA-V2 version even if it only has a 2.8 screen, don't care about the screen because everything I do is with a W10 tablet. Pros and Cons maybe?? :) thanks.
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Phil,
DiSlord, who has worked on the firmware for both the NanoVNA-H4 and S-A-A-V2 did a good job of answering your question in a related post. English is not his first language so I cleaned the translation up a bit.
"I think the H4 < 900MHz (possibly up to 1200MHz) is more useful. It is faster (on measure and display draw speed), has more functions (like controllable display brightness, support for a SD card), and 4" display. For frequencies < 900MHz it has equal or better dynamic range than the S-A-A-2. The H4 with my firmware allows measurements between 800 - 10kHz. The H4 supports screen capture, comes with a battery and pretty good case.
The V2 is a better choice if you need to measure frequencies from 1200 - 3300 MHz. The battery, case, cables and OSLT standards need to be purchased separately."
I own the NanoVNA-H4 and S-A-A-V2 and share DiSlord's opinion about the H4 for measurements <900MHz. For accurate measurements of a 1900MHz antenna, I also share his opinion that the S-A-A-V2 is the best device. If you order the S-A-A-V2 from hugen's store you will receive a unit with a battery, clam shell case, cables and OSLT standards. You will also receive pretty fast delivery ( about 2-3 weeks) and hugen's typical continued support (he is already working on a 4" display unit using DiSlord's firmware with metal case).
I also own the original S-A-A-V2 purchased from Tindie. I have not yet compared hugen's version to the original version.
As Larry mentioned, you can load DisLord's latest firmware for the H4 and it will allow you to make measurements at 1900MHz, but I share DiSlord's view about any measurements made above 1200 MHz.
If you are not in a hurry, I suggest waiting for hugen's 4" version of the V2 with metal enclosure. It is expected to be ready for shipment by mid-July.
- Herb
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Re: New H4 Model Received from R & L Electronics
Thank you for your input. I will weigh my project time and the performance of above units and see how far out I can get before purchasing anything. I really don't even mind buying both, but lately it seems with new electronics if you don't use them often they tend to either fail prematurely or the programmed processors forget who they are.
thanks again. pr
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Re: Bad V2 clones incoming
Received from Tindie. Dynamic range looks good.
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Re: "Why would a VNA for 2-port measurements not design the second port for 50 ohms?"
They ARE designed for a 50 ohm termination, how well they achieve it may be another question.
I have an H4. When I calibrate with SOL at the end of one section of the included cable using the female-female adapter and then remove the adapter and connect to CH1, I get just a dot in the center of the Smith chart and better than 60 dB S11 across a full 1.5 GHz sweep.
If yours isn't coming close to this, you might have a defective one. You could always try verifying the CH1 resistance with an ohm meter, the termination goes down to DC on all the schematics I have reviewed. Doesn't mean it will stay 50 ohms at RF of course, but if it isn't 50 at DC, that's a problem right there.
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Re: New H4 Model Received from R & L Electronics
On Tue, Jun 16, 2020 at 10:02 AM, Phil Royce wrote:
reason why I ask is I need to model 1900mhz antennas and the current NANOvna I have from the original builder/designer does not go that high, and the current H4 does not also. So is there a reason I would not want to go with the SAA-V2 version even if it only has a 2.8 screen, don't care about the screen because everything I do is with a W10 tablet. Pros and Cons maybe?? :) thanks.
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Phil,
DiSlord, who has worked on the firmware for both the NanoVNA-H4 and S-A-A-V2 did a good job of answering your question in a related post. English is not his first language so I cleaned the translation up a bit.
"I think the H4 < 900MHz (possibly up to 1200MHz) is more useful. It is faster (on measure and display draw speed), has more functions (like controllable display brightness, support for a SD card), and 4" display. For frequencies < 900MHz it has equal or better dynamic range than the S-A-A-2. The H4 with my firmware allows measurements between 800 - 10kHz. The H4 supports screen capture, comes with a battery and pretty good case.
The V2 is a better choice if you need to measure frequencies from 1200 - 3300 MHz. The battery, case, cables and OSLT standards need to be purchased separately."
I own the NanoVNA-H4 and S-A-A-V2 and share DiSlord's opinion about the H4 for measurements <900MHz. For accurate measurements of a 1900MHz antenna, I also share his opinion that the S-A-A-V2 is the best device. If you order the S-A-A-V2 from hugen's store you will receive a unit with a battery, clam shell case, cables and OSLT standards. You will also receive pretty fast delivery ( about 2-3 weeks) and hugen's typical continued support (he is already working on a 4" display unit using DiSlord's firmware with metal case).
I also own the original S-A-A-V2 purchased from Tindie. I have not yet compared hugen's version to the original version.
As Larry mentioned, you can load DisLord's latest firmware for the H4 and it will allow you to make measurements at 1900MHz, but I share DiSlord's view about any measurements made above 1200 MHz.
If you are not in a hurry, I suggest waiting for hugen's 4" version of the V2 with metal enclosure. It is expected to be ready for shipment by mid-July.
- Herb
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Thank you very much for your responses. A few more questions below! On Mon, Jun 15, 2020 at 06:13 AM, Erik Kaashoek wrote:
On Mon, Jun 15, 2020 at 05:10 AM, <iyerak@...> wrote:
1. A full calibration to the end of the supplied cables and up to the
maximum
frequency of 1.5GHz gave me good results when I connected the short/open
(S11~0dB) and load (S11~-50dB) standards to ch0. However, when I connected the
thru standard, S11 was between 15-20dB at most. This sounds really poor, given
that the thru is supposed to be a matched 50-ohm connector. The port 2 input impedance is not perfect 50ohm, this may limit S11
You're right! Connecting a 50-ohm load instead of the cable to port 2 shows great S11. Why would a VNA for 2-port measurements not design the second port for 50 ohms? Is there another version of the NanoVNA that has both ports at very close to 50 ohms? 2. Measurement of a microstrip double-stub bandstop filter at 1GHz showed an
S21 curve that unnaturally flattens out at about -20dB from approximately
900MHz to 1.1GHz, rather than dipping down to about -50dB, which is what
full-sized VNAs show. Was this measured at the end of a cable or directly on thenanoVNA?
This was measured at the end of the cables, where the calibration was also done. 3. All my measurements show something weird around 900MHz, like a
discontinuity in the curves. I know that the NanoVNA-H switches over to the
3rd harmonic from 900MHz to 1.5GHz and the dynamic range is reduced, but why
shouldn't the curves be continuous? At 900MHz the nanoVNA switches to the 5th and 7th harmonic. YOu may try to use
the 'threshold' command in console mode to change this switchover frequency a
bit higher or lower to see if that improves
Thanks - still have to figure out how to enter console mode in the NanoVNA-H 4. Finally, just a question: has anyone had luck finding the properties (e.g.
capacitances, inductances, phase offsets, etc.) of the supplied calibration
standards, so that they can be entered into NanoVNA-saver? See the wiki
Thanks - found some information there. Do you have any recommendations as to the simplest and most stable software for interacting with the NanoVNA and exporting data?
--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK
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Re: New H4 Model Received from R & L Electronics
The SAA-V2 has a Windows app similar to NanovnaSaver. Please read up on the Nanovna V2 user group:? /g/NanoVNA-V2/topicsAlso, if you already have an H device with the hardware changes to the bridge circuits, try using DiSlord's firmware. He has stretched the unit's use up to just over 2GHz with enough noise floor to make some OK measurements.
On Tuesday, June 16, 2020, 1:02:51 p.m. EDT, Phil Royce <ke4pwe@...> wrote:
reason why I ask is I need to model 1900mhz antennas and the current NANOvna I have from the original builder/designer does not go that high, and the current H4 does not also.? So is there a reason I would not want to go with the SAA-V2 version even if it only has a 2.8 screen, don't care about the screen because everything I do is with a W10 tablet.? Pros and Cons maybe?? :) thanks.
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Re: New H4 Model Received from R & L Electronics
reason why I ask is I need to model 1900mhz antennas and the current NANOvna I have from the original builder/designer does not go that high, and the current H4 does not also. So is there a reason I would not want to go with the SAA-V2 version even if it only has a 2.8 screen, don't care about the screen because everything I do is with a W10 tablet. Pros and Cons maybe?? :) thanks.
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Re: NanoVNA Console Commands
Thanks guys, let me look at the software and I'll come back if I have follow on questions. Also good to know the returned data values are normally corrected.
Thanks!
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On June 16, 2020, at 11:01 AM, hwalker <herbwalker2476@...> wrote:
On Tue, Jun 16, 2020 at 07:44 AM, Allen Hill wrote:
Hi Larry, not trying to reinvent the wheel. I'd like to control other 'instruments' based on NanoVNA measurements in an automated environment. Thus the use of Python to access measurements from the device.
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Allen,
Larry meant that NanoVNA-Saver is written in Python and contains well verified code for the measurements you want to perform. Just copy and paste the relevant functions.
If you don't want to wade through the entire NanoVNA-Saver source then take a look at the Python class for controlling the NanoVNA at .
BTW, unless you turn off correction on the NanoVNA, "data 0" and "data 1" console commands should return corrected complex pair values.
- Herb
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Phil Royce
