开云体育

A new NanoVNA-F just arrived for my ham club today. We already have several NanoVNA's of different manufacture and are happy with their performance but some of the members wanted a unit with a larger display and the NanoVNA-F is currently the only option. Here are some quick observations as a long time NanoVNA-H user

I only learned since the unit arrived that after a QSLT calibration is performed, there is approximately a 0.4 dB offset when an s21 measurement is performed. Seems that until the firmware is corrected, you have to use one of your save locations to store a separate through calibration to get rid of the offset. I'm not sure why this bug is just now being reported by the user community.

The current firmware for the NanoVNA outpaces the NanoVNA-F. I wasn't aware TDR measurements and impedance in the R format are not available. Measurement range extension to 1500 MHz has also not yet been implemented. I haven't verified it, but it has been reported that screenshot capture to the device Udrive or via console command is also not available. I'm sure over time most of these issues and others will be addressed, but currently the NanoVNA-F team seems to put more effort into promoting its other products (such as the demo board) than delivering requested firmware updates.

Since my eyesight is still fine I don't have any problems with the NanoVNA-H's 2.8" screen size, especially on the units that we have upgraded to hugen's 0.4.0AA large font firmware. I'll leave the NanoVNA-F to our club members who just want to use the unit as a VSWR analyzer, at least until the firmware catches up with the NanoVNA-H. Rune's NanoVNA-saver application adds a lot of the missing firmware capability but I tend to use my NanoVNA disconnected from a computer for most of my measurements. Some features or the NanoVNA-F, such as screenshot capability, will not be available in a future NanoVNA-saver update unless the NanoVNA-F developers add the required code to their firmware.

In my opinion the 4.3" display size, larger battery and metal case are nice, but I was expecting more on the firmware side for 3x what we paid for the NanoVNA-H. I hope the NanoVNA-F firmware developer's start responding to user requests for worthwhile firmware extensions. Their current response has been - its in the works or to be patient. The NanoVNA-F specific C# application that was promised at launch has still not been delivered. Thankfully Rune was able to convince them to modify their command line prompt so that the majority of the NanoVNA-Saver commands work with the NanoVNA-F.

Maybe hugen, edy555, QRP and the rest of the fine NanoVNA-H firmware developers have spoiled me.

- Herb

Herb,

You might like to post questions about the NanoVNA-F in its own group:

/g/nanovna-f

I'm sure the developers would appreciate your suggestion for new firmware features and extended frequency range. I expect many users would appreciate these features!

Cheers,
David
--
SatSignal Software - Quality software for you
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Email: david-taylor@...
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On Fri, Dec 27, 2019 at 02:42 AM, David J Taylor wrote:

You might like to post questions about the NanoVNA-F in its own group:

I'm sure the developers would appreciate your suggestion for new firmware features and extended frequency range. I expect many users would appreciate
these features!
==================================================================================

Hi David,
After Dr. Kirby was banned by the NanoVNA-F group's owner for expressing negative opinions about the connectors used on the Demo board , I try to only offer assistance to other user's on that group. This group is by users for users and freely accepts the exchange of ideas. When a group is created by a retailer, as is the NanoVNA-F group, it can tend to be less receptive to any perceived criticism of its product. Dr. Kirby was eventually re-instated after other members complained about the quick yank, but the initial response was to me un-democratic.

Hopefully the NanoVNA-F's production team will start pouring more of its resources into fulfilling its promises on the software and firmware side. We all want to see products like the NanoVNA-F become successful, but we also want to see continued after market contributions such as hugen has done with the NanoVNA-H. So far I've seen words, but not action.

Happy holidays.

- Herb

He wasn't just banned because his criticising the connectors, he was banned also because of his obnoxious and overbearing posts.He seems to have his own agenda besides shamelessly promoting his own business.
I often wondered why he had not been banned for good long before that episode.

-Bilbo

You are entitled to your opinion of course. But I would like to know who you actually are? On this occasion I do not totally agree with you. I am sure that you don't reside at Bag End so who are you? How do we know that you are not a business rival?

David does make excellent cal kits and is very knowledgeable, I think his agenda is to try and stop people getting carried away with what these products we are discussing actually are. Convenient, cheap, remarkable value for money. However they are not professional pieces of equipment and have short comings. That seems to be David's agenda, he seems to put the brakes on and try to stop folklore becoming fact. That is a useful contribution in my opinion.

Obnoxious and over bearing? At times, yes!

Regards

Conrad Farlow, PA5Y

I started this topic because I advised my ham club that in purchasing the NanoVNA-F they would be getting the same NanoVNA-H unit that some of our members have embraced, but with a larger screen, case, and bigger battery. We approved its purchase over additional NanoVNA-H's for our youth group. When the NanoVNA-F arrived I didn't realize how far behind the NanoVNA-H it was in terms of firmware enhancements, and also surprised that errors such as the 0.4dB s21 offset after OSLT calibration was just being reported by some users.

My hope was to give other group members information that I didn't have when I made my recommendation. I hope this topic continues in that vein and not veer off topic regarding Dr. Kirby's popularity. I only brought that incident up to point out that this group was created by a user for users, and is widely open to discussion. Whereas the NanoVNA-F group was created by the manufacturer and; therefore, has not enjoyed the same user contribution to documentation, NanoVNA-F specific software, and firmware that the NanoVNA-H has.

In retrospect, I would have advised holding off on the purchase until the promised NanoVNA-F firmware enhancements have been delivered and shaken out, or wait for Gabriel's 3GHZ offering with larger display option.

- Herb

Thanks to the work of AA6KL，the 4-inch version of NanoVNA-H is coming soon. Like NanoVNA-H Rev3.4, it can work well up to 1.5GHz.

/g/nanovna-users/message/8708

hugen

Hello everyone, we just released firmware 0.0.5, and sorry for coming so late :-)
NanoVNA-F firmware 0.0.5 released ! up to 1.5GHz, bug fix, REAL IMAG R X trace format, the new PCB has arrived.
1. support measurable frequency to 1.5 GHz, default setting 1 GHz, accurate measurement up to 1.35GHz.
2. fix: unexpected 0.3dB offset of s21 in thru
3. fix: mark all off bug
4. fix: clutter display when standing wave ratio is infinite
5. add version & info command
6. add REAL IMAG R X trace format
more detail:

Thanks ! And the next version will be released in January 2020.

Can someone please tell me if the case dimensions are different on the F model than the H model ? I have to arrange a case for both and want to know if I can use my H model case on my f model NANO.