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Re: Spur at 4.275 GHz on ZS-407

 

OK, let me try to improve the situation at 4.3 GHz
Just to be sure, there is nothing wrong with the HW.
--
Designer of the tinySA
For more info go to

Re: WinSpectrum III spectrum analyzer question

 

I think that’s the general idea! There’s way too much traffic on this forum IMHO. Peter
Re: WinSpectrum III spectrum analyzer question

 

A separate group?? I believe you'd miss a lot of good traffic.??

Dave - W?LEV

Virus-free.


On Tue, Mar 25, 2025 at 6:27?AM Erik Kaashoek via <erik=[email protected]> wrote:
Would it be possible to create a separate WinSpectrum support group on ?
No problem to point people to that separate group from here.
--
Designer of the tinySA
For more info go to



--
Dave - W?LEV
Re: Spur at 4.275 GHz on ZS-407

 

Do the spurs increase in level when you attach the telescopic antenna?
No, it remains the same. And it is present even when the RF input is short-circuited with the VNA calibration "S" cap.
?
Can you check if you see similar spurs at 1069 MHz, 2138 MHz and 4276 MHz?
Not exactly at those frequencies (or that is just a measurement error), but some of them are there with Spur Removal turned off. When I set it to On or Auto, they are gone, except for the one at 4.276 GHz.?
Re: Spur at 4.275 GHz on ZS-407

 

Can you check if you see similar spurs at 1069 MHz, 2138 MHz and 4276 MHz?
I assumed these where solved but if you still see them I have to do some more work.
--
Designer of the tinySA
For more info go to

Re: Spur at 4.275 GHz on ZS-407

 

Do the spurs increase in level when you attach the telescopic antenna?
--
Designer of the tinySA
For more info go to

Spur at 4.275 GHz on ZS-407

 

Hello Erik and everyone.

I've recently purchased a TinySA Ultra+ from a local vendor and the unit has an issue.
It is a ZS-407 with HW version V0.5.4 and S/N SU-407-25011571.
It has a spur at ~4.275 GHz that is present regardless of the Spur Removal or Sample Rep settings:?
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?
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When I narrow the frequency bandwidth to 100kHz and turn off Spur Removal, I see that the "spur" is actually five pulses:?
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The instrument passes the self test and calibration successfully.
This issue was present in the factory firmware (I believe it was V1.4-195) and is still present after upgrading to the latest V1.4-197.

The vendor has checked a few other units they have in stock and they show the same spur:
?
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The vendor assures me that the units are genuine and that they get them directly from ZeenKo.
I also have an older TinySA Ultra (up to 5.3 GHz, ZS-405 maybe, it has no model number on it) and it has no such anomalies.

So my questions are:

- Is this device really genuine?
- Is this a known issue?
- Is it faulty hardware?
- How can this be fixed (if it's possible)?
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Thank you!
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Best wishes,
Andrew
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PS: This is the device in question:
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Re: WinSpectrum III spectrum analyzer question

 

Thank you for the suggestion to create a dedicated group for WinSpectrum III.
Unfortunately, we don’t have the time required to maintain a separate support group.
However, anyone interested in WinSpectrum III (both 32-bit and 64-bit versions) is welcome to visit:

?

There you’ll find the latest versions and updates, as well as a way to contact us if needed.

We greatly appreciate all the feedback and suggestions shared by the members of groups.io/g/tinysa.

Kind Regards

Xavier Junqué

Juan M0WWA
Re: WinSpectrum III spectrum analyzer question

 

Would it be possible to create a separate WinSpectrum support group on groups.io?
No problem to point people to that separate group from here.
--
Designer of the tinySA
For more info go to

WinSpectrum III spectrum analyzer question

 

Hi,

I'm beginning to use WinSpectrum III and I don't know how to switch
inputs from the application. I works ok if I switch them in the tiny.

Best regards,

Ignacio


--
Este correo electrónico ha sido analizado en busca de virus por el software antivirus de Avast.
www.avast.com
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

Fair enough, least not vulnerable being kept off the internet. I believe Win10 support finishes up soon.
Cheers Dave

On Mon, 24 Mar 2025, 1:45?pm John Cunliffe W7ZQ via , <w7zq=[email protected]> wrote:
Dave, some do some don't, unfortunately some of the old R&S and HP do not work. I don't mind using an older OS in the shop,I do not need the newest, after all that computer never goes out to the internet it is on its own network without internet connectivity.
?
John
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

Dave, some do some don't, unfortunately some of the old R&S and HP do not work. I don't mind using an older OS in the shop,I do not need the newest, after all that computer never goes out to the internet it is on its own network without internet connectivity.
?
John
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

Hi John, Have you tried?running?the old apps in Compatibility mode under win10/11,?I had a similar?prob?and?worked?fine in?compatibility mode.

Dave?

On Mon, 24 Mar 2025 at 02:13, John Cunliffe W7ZQ via <w7zq=[email protected]> wrote:
Dave, there are two versions, one for WIN 10/11 and one for legacy devices like WIN7 and XP. Since most of my gear in my hobby shop needs WIN7, XP and in a few cases DOS I am maintaining the shop computer at that level. WIN10/11 just throw up trying to run those old programs.
?
John
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

? Tested on Windows XP (Virtual Machine)
Just a quick note to confirm that the current 32-bit version of WinSpectrum III has been successfully tested on a Windows XP virtual machine (VirtualBox).
The application runs smoothly, including full USB communication with the tinySA analyzer, real-time plotting, and logging features.

If you're working in a legacy environment or testing on older systems, this version should work without issues.

? The required STMicroelectronics VCP driver (VID_0483, PID_5740) is already included in the ZIP package.
This is the same driver used for Windows 7 (32-bit), and it installs without problems on XP.
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

Dave, there are two versions, one for WIN 10/11 and one for legacy devices like WIN7 and XP. Since most of my gear in my hobby shop needs WIN7, XP and in a few cases DOS I am maintaining the shop computer at that level. WIN10/11 just throw up trying to run those old programs.
?
John
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

The developers may have more qf an idea but I wouldn't expect recently developed S/W to reliably function on a OS less than Win10.

Dave
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

I played around with a win7 computer in XP mode the 32bit version and my original ultra.
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Markers do not work at all, no matter what information entered.
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The curser does not stay hidden and shows up every time there is a change, to fix it one has to uncheck the curser and? then re-check it.
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The points seem to be fixed at 460 or less? no matter if it is single sweep or continues sweep.
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I could not get the waterfall to work, activating the function just freezes everything.
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There have been a few strange disconnects during the testing that I have not yet associated with a special combination of commands.
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That said, I like the large display it is easy on my old eyes given time, this could evolve into something nice and useful.
?
John
Re: WinSpectrum III spectrum analyzer application designed for Windows users working with Tiny SA Ultra+

 

Well done developing WinSpectrum, easy to use. The only very minor issue I've found is when selecting the Marker tab, the Accept and Cancel options are in Spanish, tested with 64bit Win11,? WinSpectrum version 3.0.1.2??
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Keep up the good work
Cheers Dave VK3DPM
Re: Output impedance of RF sinewave generator (Tiny Ultra)

 

Using an external attenuator is the preferred method with any RF generator.
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Some measure the output and use it as feedback to control the RF level, so that it is consistent over a large frequency range.
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This can be messed up when feeding highly reactive loads, so by adding an attenuator into the path, it helps ensure the generator always sees something close to 50 ohms, regardless of the actual load.
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Don't consider modifying the Ultra, you will just add a whole load of additional problems.
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Regards,
?
Martin
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On Fri, Mar 21, 2025 at 10:24 AM, R. Maris wrote:

I'll order a 50 ohms BNC attenuator
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