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Kinda new to the tinySA Ultra. Is there a way I can have multiple markers active and labeled on the device? I see 3-5 major spikes on my display with a 30in antenna attached and wonder if they are AM/FM broadcast stations.

Bret/N4SRN

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But then, noise sources are easy to build and used externally or bought cheap on the internet. Why bogging down the TinySA with it?

Try TinySA app. If that works contact Vitor.

One more observation is that the VMA frequency axis labels are showing?

1Hz? ? 1Hz? ? 1Hz? ? 1Hz .........

even though the frequency settings are correct and the displayed active spectrum is also correct.

Thanks for your quick reply.
Tried another USB socket on my Thinkpad laptop. No change. same problem.
Cable is original as supplied.

Try a different USB port or cable?
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Just got a brandnew TinySA from the recommended dealer at Ali Express. I use it with VMA TinySA by Vitor.
When I press start, the spectrum display shows a full sweep. However the TinySA keeps on sweeping with the previously used manual settings.
The frequency entry on VMA shows:

Start: 0.1 MHz
Centre: 174950.1 MHz (??)
End: 349.9 MHz

the VMA is clearly live but it freezes after a few minutes.

Probably some trivial problem that I do not see or am no aware of.
Do I need to set the TinySA to USB operation?

Any comment/help is much appreciated.
thanks
Dieter, VK3FFB

Colin, its an interesting idea. To be investigated in case a substantial HW update is planned, which is not the case at the moment.
Space will be a problem, also power and cost.
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Erik
I was just wondering if possible a noise source could be produced from the Cal output
to connect through a dut to look at its spectrum? - even if a bit rough, just to get an idea

regards
Colin

Here some more alternatives of this 18Ghz, blue, "flexible", solid middle conductor cable,
at an affordable price;






(I personally vote for K_02252_D, even the RG-316 also be more than enough for low freq)

滨蝉迟惫á苍

Well, courier came with the parts today and replaced the RF switch (marked S79 instead of A79).
Everything is working again.

Thank you for the guidance, Erik!

Yes, the cable diameter already meets this production tolerance given by them.


I'am not read the chinese characters; - here looks missing the jacket, from the dimension list...


- amazing cable, - branded is not cheap, even on aliexpress;


- in any case, there may be differences



滨蝉迟惫á苍

Thank you Erik for the quick reply. ?I'm glad it's nothing serious. ?Overall, I am very happy with this analyzer.?
Tomasz

Still hoping to get this bug resolved.

To make this even more confusing to figure out, this error is not a simple percentage applied to all amplitudes.? Referring to the example in my previous post:

545762525.000;?????????? -134.809?????????? (marker shows -117.1)
548322611.000;??????????? -69.185??????????? (marker shows -60.094)
655479516.000;?????????? -135.025?????????? (marker shows -117.28)

-134.809 is 115.12297181896% of -117.1
-69.185 is 115.12796618631% of -60.094
-135.025 is 115.13045702592% of -117.28

We are still tuning the criteria for the flatness.
The important part of the pass band, the left side, is good, the criteria for the right side may be a bit too strict.
No need to worry, the next FW version will probably pass test 7.
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Hi
I have TinySA ultra but unfortunately it does not pass its selftest 7. You can see that the filter does not have flat characteristics. ?Is this a serious error? ?The device was purchased from the Zenko store. ?What could be the reason and should I complain about the device?
Tomasz

Istavan,

You might want to look at the data for SS405 from this vendor. It seems to be very close to what you are seeing and what is shipped with the liteVNA 64 I just received.



John

Hi,

A lot of information has been shaken out of the bushes in this thread. I have always been a "forty meter ham" and I get dizzy if I exceed 30MHz! Checking harmonic content at *my* frequencies seems rather trivial compared to what these machines and their cables can do. Thank you everybody for the big boost in confidence using these. I have been considering use of the amateur satellites so I might use some of the higher spectrum capabilities here but not even close to the limits.

73,

Bill KU8H

bark less - wag more