Does anyone know if a device such as this would work between the NanoVNA and a computer running NanoVNA Saver?

I would like to connect the VNA to the feedpoint of an antenna and hoist it to height, then see the behavior on the computer from the ground. I'm hoping that the USB Bluetooth dongle would connect the VNA to the computer in place of a USB cable.

https://tinyurl.com/Bluetooth-Dongle-eBay

Yes it can be done with a low cost Bluetooth module. Search past messages in this group.

Hello,
As far as a NanoVNA H or H4, yes, a Bluetooth module can be installed inside the H or H4 as I have done in both mine.
But not the type you referred to.
It would have to be the type shown in the attached photos.
Clyde KC7BJE

For some reason the photos appear to have not been included. So I will try again.

If you calibrate using short , open and load at the coax end where it feeds the antenna and then hoist that cable end and reattach it to the antenna the same thing is accomplished. But if you were in your attic adjusting an antenna and you wanted to view the results of your adjustments on the NanoVNA in the basement the bluetooth interface could be a time saver if the bluetooth path allowed a good signal, the path would be 25 feet in my house. In a park with bright sunlight the Saver display would be easier to read. Avoiding hand capacitance is another plus. I worry that me trying to add bluetooth to my old H version would not turn out well.

Personally, I do NOT need yet another RF source in my measurements when I'm
making RF measurements. NOT for me!

Dave - WØLEV

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On Mon, Jul 1, 2024 at 4:49 AM Jerry - AE0MY via groups.io <ae0mygcabrad=
gmail.com@groups.io> wrote:

If you calibrate using short , open and load at the coax end where it
feeds the antenna and then hoist that cable end and reattach it to the
antenna the same thing is accomplished. But if you were in your attic
adjusting an antenna and you wanted to view the results of your adjustments
on the NanoVNA in the basement the bluetooth interface could be a time
saver if the bluetooth path allowed a good signal, the path would be 25
feet in my house. In a park with bright sunlight the Saver display would be
easier to read. Avoiding hand capacitance is another plus. I worry that me
trying to add bluetooth to my old H version would not turn out well.

--

*Dave - WØLEV*


--
Dave - WØLEV

Since I am working with 1-30 MHz and/or 144-450 MHZ, I don't think that Bluetooth signals should be a problem.

Not so. The front end of the VNA is wide open with no filters.

Dave - WØLEV

On Tue, Jul 2, 2024 at 5:17 PM Neil Preston W0NRP via groups.io <w0nrp=
yahoo.com@groups.io> wrote:

Since I am working with 1-30 MHz and/or 144-450 MHZ, I don't think that
Bluetooth signals should be a problem.

--

*Dave - WØLEV*


--
Dave - WØLEV

On Tue, Jul 2, 2024 at 11:19 AM, W0LEV wrote:

Not so. The front end of the VNA is wide open with no filters.

Dave, do you have any evidence that installing a Bluetooth module causes interference with NanoVNA measurement?

Brian

No. However any strong RF source close to the input of the NanoVNAs may
cause nonlinearities in the mixer and / or compression within the mixer if
the RF port input is stronger than the LO port. I've worked with all
kinds of frequency mixers for at least 4+ decades.

You might try holding a BT source very close to the NanoVNA while looking
at S11, return loss, or SWR of a small network and look for changes between
closeby BT source and no or far BT source.

Dave - WØLEV

On Tue, Jul 2, 2024 at 6:33 PM Brian Beezley via groups.io <k6sti=
att.net@groups.io> wrote:

On Tue, Jul 2, 2024 at 11:19 AM, W0LEV wrote:

Not so. The front end of the VNA is wide open with no filters.

Dave, do you have any evidence that installing a Bluetooth module causes
interference with NanoVNA measurement?

Brian

--

*Dave - WØLEV*


--
Dave - WØLEV

Perhaps someone who has installed a Bluetooth module in a NanoVNA can tell us whether they have noticed any interference, especially when measuring an antenna. That provides an opportunity for the Bluetooth signal to enter the NanoVNA in a way that measuring a small network would not.

Bluetooth solves not only Neil's remote measurement problem but also tricky measurements at ground level. Some antenna impedance measurements are so sensitive that your body can affect them simply by being in the near field. Not holding the VNA isn't enough. With Bluetooth you can connect the VNA directly to the antenna with an adapter to eliminate the stray current path a VNA cable creates and then walk far away to take a measurement. The only alternatives that have occurred to me are to set some screen markers and view the VNA from a distance with binoculars, perhaps fitting a sunshield over it. You could also try mounting a camera near the VNA, start recording a video, and then walk away. Bluetooth sounds a lot better than either of these alternatives.

Brian

Here's a better idea: implement delayed recording. You press the VNA button and recording to the SD card begins sometime later. Neil might need a few minutes to haul the antenna with VNA to the desired height. Someone testing on the ground might need 30 seconds to walk far away. I'll bet this would be easy to implement.

Brian

Personally I find it a bit counterproductive to even think of putting a transmitter near a unit recording weak signals.       If it transmits during a sweep, it will corrupt all the sweep data.
This is NO frequency selectivity in the Nano's RF power detectors.

He doesn't. It's obvious nonsense.

On Tue, 2 Jul 2024 at 20:32, Brian Beezley via groups.io
<k6sti@...> wrote:

On Tue, Jul 2, 2024 at 11:19 AM, W0LEV wrote:

Not so. The front end of the VNA is wide open with no filters.

Dave, do you have any evidence that installing a Bluetooth module causes interference with NanoVNA measurement?

Brian

No, it isn't. It is called fundamental overload and it happens. It's not rocket science, but it *is* radio science.

73

-Jim
NU0C

On Wed, 3 Jul 2024 00:55:16 +0200
"Dragan Milivojevic via groups.io" <d.milivojevic@...> wrote:

He doesn't. It's obvious nonsense.

On Tue, 2 Jul 2024 at 20:32, Brian Beezley via groups.io
<k6sti@...> wrote:

On Tue, Jul 2, 2024 at 11:19 AM, W0LEV wrote:

Not so. The front end of the VNA is wide open with no filters.

Dave, do you have any evidence that installing a Bluetooth module causes interference with NanoVNA measurement?

Brian

--

73

-Jim
NU0C

Who doesn't? Why is it total nonsense?

Dave - WØLEV

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On Tue, Jul 2, 2024 at 10:55 PM Dragan Milivojevic via groups.io
<d.milivojevic@...> wrote:

He doesn't. It's obvious nonsense.

On Tue, 2 Jul 2024 at 20:32, Brian Beezley via groups.io
<k6sti@...> wrote:

On Tue, Jul 2, 2024 at 11:19 AM, W0LEV wrote:

Not so. The front end of the VNA is wide open with no filters.

Dave, do you have any evidence that installing a Bluetooth module causes

interference with NanoVNA measurement?

Brian

--

*Dave - WØLEV*


--
Dave - WØLEV

The tenor of recent interchanges suggests our civilized group entering the combat zone, not unlike those involving DJ I’m Perfect, Cecil, and those similarly earnest but technically unaware, or conflicted by their employment, an unable to gracefully accommodate other opinions.

Perhaps time to change the channel, or at least turn down the gain.

Sigi, Serge and others have experience in theses matters, hooking Bluetooth onto gizmos. Take a peek.

Take a breath.

Wishing you just enough Zcmc to do the job,


73
AG6CX
Sausalito CA

Sure, prove me wrong.

On Wed, 3 Jul 2024 at 03:31, Jim Shorney via groups.io
<jimNU0C@...> wrote:

No, it isn't. It is called fundamental overload and it happens. It's not rocket science, but it *is* radio science.

73

-Jim
NU0C

On Wed, 3 Jul 2024 00:55:16 +0200
"Dragan Milivojevic via groups.io" <d.milivojevic@...> wrote:

He doesn't. It's obvious nonsense.

Basic examination of the architecture shows that there is no way that
a 2.4GHz signal is going to
influence the measurement.

Alternatively you can setup a simple test using the BT module or a
common WiFi antenna close to a
router.

On Wed, 3 Jul 2024 at 03:42, W0LEV via groups.io
<davearea51a@...> wrote:

Who doesn't? Why is it total nonsense?

Dave - WØLEV

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On Tue, Jul 2, 2024 at 10:55 PM Dragan Milivojevic via groups.io
<d.milivojevic@...> wrote:

He doesn't. It's obvious nonsense.

On Tue, 2 Jul 2024 at 20:32, Brian Beezley via groups.io
<k6sti@...> wrote:

On Tue, Jul 2, 2024 at 11:19 AM, W0LEV wrote:

Not so. The front end of the VNA is wide open with no filters.

Dave, do you have any evidence that installing a Bluetooth module causes

interference with NanoVNA measurement?

Brian

--

*Dave - WØLEV*


--
Dave - WØLEV

Hi.

Starting the recording with NO delay might bring evidence that walking away causes a change to the readings ... or not at all.

Jean-Louis