I hadn't had it long and hadn't used it with anything other than the included antenna and hooking it up to itself.? I suppose it could have been hit with static, but I was mindful of that when I was using it.

The self test is the diagnostics for the signal path HW and the touch test for the display/touch HW
What else do you need?
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Hello Eric and TNX 4 all the hard work!!!

Have you written any diagnostic firmware to help trouble shoot these little marvels ??

73 N8AUM Vidas

Can you post a photo of the back of the tinySA and photo's of the screen of tests 6 and 8 failing
You may have a bad clone
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Thanks for allowing me to join. I just received my Tiny SA this week and performed the self test diagnostics. Unfortunately there were errors present during this. I'd like to know the issue that I'm seeing and how to correct the errors. Please see attached screen shot and advise.

Thanks
Joe

On Wed, Jan 20, 2021 at 12:25 PM, Nicholas R wrote:

For interest sake, I ran the new test...

Nicholas,
What type of sources have used in combination with the tinySA?
Any sources that generate possibly more than +10dB?
?
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On Thu, Jan 21, 2021 at 08:47 PM, Tom D'Orsay wrote:

Ran 30db test twice and it failed badly 4 to 5 db variation.

Tom?
What type of sources have used in combination with the tinySA?
An sources that generate possibly more than +10dB?
?
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Tom,

This is a very clear failure of the 4dB step of the built in attenuator. Agree you should ask for an exchange. Refer to this measurement as evidence
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? ? ? ? ? ? ?Erik:??

So I upgraded to 1.1-77. Had to manually install drivers from win64 drivers folder.? Ran 30db test twice and it failed badly 4 to 5 db variation. I did a recalibrate after firmware update and had saved reference info and checking found it still the same. Looks like I ned to return this to R&L for exchange. I notified them a few days ago that I was testing further and would advise.

? ? ? ? Tom
? ? ? ? KA1GXR

Good point. Never thought about this. Makes totally good sense.

Thanks Mike. I had the same problem yesterday.

First run unit does nicely in this test

73

-Jim
NU0C

On Tue, 19 Jan 2021 23:53:00 -0800
"Erik Kaashoek" <erik@...> wrote:

New FW released
Version v1.1-77

Changes:
- MEASURE/MORE/LINEAR added

The linearity test requires an input signal between -40dB and -25dB and a single marker positioned on that signal.
Activating the linearity test will step the built-in attenuator through all attenuation values and draw a green line on the screen at the measured signal level.
If all goes well the line should be flat within +/- 1dB with an occasional measurement deviating due to interference/noise

The test also helps in getting confidence about the 1dB compression point of the tinySA. This can be measured by applying a signal of 0dB and activating the MEASURE/MORE/LINEAR test
The compression starts when attenuation is below 5dB and is visible in the green line being curved down a bit at the right side.

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For more info on the tinySA go to

On Tue, Jan 19, 2021 at 03:33 PM, hwalker wrote:

I noticed that 0.5 dB steps can be entered from the on-screen keypad but only only 1 dB steps can be programmed using the 'attenuate' command (i.e. attenuate 15.5 displays Atten: 15dB on the tinySA status display.? Is that an intentional limitation

Herb. I was not sure 0.5dB steps where needed and it is working by accident in the tinySA
?
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This picture is very good evidence of a failing attenuator. Suggest you take this up with your supplier.?
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For interest sake, I ran the new test...

Yes, that is good
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Eric:
The test on my unit seems to start at 29dB of attenuation.

charlie

On Tue, Jan 19, 2021 at 11:53 PM, Erik Kaashoek wrote:

Version v1.1-77

Added some pictures to the wiki page as measurement examples


?
--

New FW released
Version v1.1-77

Changes:
- MEASURE/MORE/LINEAR added

The linearity test requires an input signal between -40dB and -25dB and a single marker positioned on that signal.
Activating the linearity test will step the built-in attenuator through all attenuation values and draw a green line on the screen at the measured signal level.
If all goes well the line should be flat within +/- 1dB with an occasional measurement deviating due to interference/noise

The test also helps in getting confidence about the 1dB compression point of the tinySA. This can be measured by applying a signal of 0dB and activating the MEASURE/MORE/LINEAR test
The compression starts when attenuation is below 5dB and is visible in the green line being curved down a bit at the right side.

--

It would help us if you could install the a new FW. V1.1-77 and run an additional test

Connect high and low with SMA cable
Set CAL OUTPUT to 30MHz
Start MEASURE/MORE/LINEAR

A green line should appear and the attenuation will start at 30dB and step by step decrease till zero
When completed (will take some time) with a good attenuator the screen should look like this
The line does not have to be perfectly flat.


Please post a picture of the screen with your tinySA


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