The measurements continued. 1 swiping cycle of source took 1000 seconds.
Accumulated 4 cycles:

Thank you. I seem to have missed this thread.
There was a question on correction. Is it worth using the previously recorded correction factors in the new firmware?

коррекция низкая 0 10000 14,2? ? ? ? ? ? ?

коррекция низкая 1 40000 9,5? ? ? ? ? ? ??

коррекция низкая 2 100000 7,6? ? ? ? ? ? ?

коррекция низкая 3 300000 3,8? ? ? ? ? ? ?

коррекция низкая 4 500000 1,5? ? ? ? ? ? ?

коррекция низкая 5 900000 0,1? ? ? ? ? ? ?

коррекция низкая 6 4000000 0,3? ? ? ? ? ??

коррекция низкая 7 6000000 0.0? ? ? ? ? ??

коррекция низкая 8 30000000 0.0? ? ? ? ? ?

коррекция низкая 9 90000000 -0,8? ? ? ? ??

коррекция низкая 10 210000000 0,7? ? ? ? ?

коррекция низкая 11 300000000 0,4? ? ? ? ?

коррекция низкая 12 380000000 1,4? ? ? ? ?

коррекция низкая 13 510000000 1,0? ? ? ? ?

коррекция низкая 14 600000000 0,8? ? ? ? ?

коррекция низкая 15 690000000 0,7? ? ? ? ?

коррекция низкая 16 780000000 2,6? ? ? ? ?

коррекция низкая 17 810000000 5.2? ? ? ? ?

коррекция низкая 18 820000000 6,9? ? ? ? ?

коррекция низкая 19 830000000 9,5? ? ? ? ?
Does it make sense to keep it?
these corrections changed with the latest firmware, I tried to change the correction to the previously saved one, I did not notice any difference in the readings.

Bit better, but:

What means: DEPTH ERROR?
Modulation works but writes this error
this error was at the time of purchase.
you said that the device is calibrated and corrected in production.
but as soon as I received the device, I saved the correction and also made a dump.
here I met a faulty LNA in the topic there the same correction values ??\u200b\u200bthat I had.

Can you test the tnySA Basic with setting display/sweep accuracy/presice

Thanks for the quick explanation.
If I understood correctly, then this is not the actual problem, but the consequence of the problem.
There is another difference between these two devices, clearly visible in the following screenshots:
??
The signal in both cases is exactly the same without any spikes. What can cause such large amplitude changes in a problematic device? The SMA is tightened well in both cases, the source, RF cable, USB cable and PC are the same.

Eric,
In the wiki this link:??For Ultra owners, there is a different??that provides an overview of getting started with the Ultra model...... does not link to the video but a different wiki page.

John

U13 was reserved for a solution for a problem that went away with the latest layout.
--

tinysa ultra, what did you plan to put the u13 chip on the board?

The red "AM" warning signals a signal above a certain level that has large amplitude changes as these can confuse the level detector
Once active a user action? or display status panel update, such as the notification of a ref level change in automatic mode, is needed to remove the warning again.
--

I have this problem on tinysa ultra.

I have 2 tinySA2.8. One works fine, and the second often lights up the indication of the red letters "AM".
In this case, the measurement mode is DISABLED.
From observations:
In the absence of a signal, "AM" does not indicate.
When a signal is applied with a level of -25 dBm (35.6mVp-p), the red "AM" appears when the menu is called and does not turn off until the input signal is removed.
Without calling the menu, this indication appears when the amplitude is sharply increased to the upper edge of the display.
After removing the signal from the input, the red "AM" continues to be displayed until any menu call.
The same is true when a signal is applied with a level of -30dBm (20.1mVp-p).
What does this mean and how to solve it?
I attach screenshots from normal and problematic devices in the same conditions:
??

I recently purchased the Ultra for installing an OTA TV antenna for a neighbor.? I set two ranges in memory, one for high VHF and the other for UHF OTA frequencies.? After installing the antenna I attached the Ultra to the antenna with a short cable and rotated the antenna until I saw the greatest number of signals.? This was done while on top of a 25 ft ladder which was only possible with an instrument of the Ultra's size.. I plan other uses as others have mentioned for my ham radio equipment.

73
W6JAK

开云体育

There are such a lot small and cheap frequency counters out there, yes it is nice if a SA can also be used as a counter, but in most cases when working with a SA a rough estimation is enough, and the markers show this very nice and fast.

It should maybe be possible to do higher resolution markers with the trade of of a slower scan.

My Anritsu SAs can do this, I use it very seldom because most of the times a counter is easier.

The TInyPFA is a very great tool, and I am lucky that I have one. It brings the observation of my rubidium oscs to? anew level for me.

But I don't see the use as a counter. The unit is setup? and wired to do long term observations of reference oscs. So I would have to buy a second one as a counter.

OK, to be honest, I have two older simple Philips counters, some handheld and two working EIP counters. But to check a HT or things like this I use usually my old, but carefully repaired, Marconi 2955 Radio Communication Analyzer.

One important point to mention. A typical counter cant handle dirty signals, because it is simly counting the zero crossings, so a mix out of more then one signal gives false readings. this is one reason why I always use a SA with the counter together. No need to do this on the high band of the EIP counters, they have a YIG preselector.

All the Best,

Isidro

On Sat, Mar 4, 2023 at 01:43 AM, brac321d wrote:

You can use TinyPFA as frq. counter??

? ?The tinyPFA is a very high accuracy phase analyzer.? Erik mused that 0.1-300MHz frequency counter capability could be added to the tinyPFA,??, but implementation turned out to be more work than he expected.? No firmware with frequency counter capability is expected.?

? ?"The main obstacle with the tinyPFA is its inability to measure low frequencies. Anything below 50kHz is difficult at least, if not impossible."

Indeed indeed.? Thank you Erik.

On 04/03/2023 06:31, MirekD via groups.io wrote:

Erik's support is excellent, it greatly improves the usefulness of this
instrument!
Mirek

Couldn't have put that better myself!

Thanks, Erik.
David
--
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