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Hello all,

I purchased my SA from Amazon a few months ago and as far as i can tell it's the real deal?
Anyways, it never failed self test until I upgraded firmware to 77 and now it will fail about 1 out of 10 times. I will downgrade and see if I can get it to fail.
I also lined the inside with copper tape to help mitigate any outside noise.?

FWIW I have had no ESD issues with my early TinySA and I don't exactly baby it. It may be because after 30+ years of working with PCs both professionally and as a hobby I have developed ESD-safe habits. Or it could be because I don't shuffle my feet across the carpet and touch the antenna. :)

73

-Jim
NU0C

On Sun, 24 Jan 2021 09:16:53 -0800
"Erik Kaashoek" <erik@...> wrote:

There is some ESD protection when the attenuator is set to manual minimum 10dB.
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For more info on the tinySA go to

There is some ESD protection when the attenuator is set to manual minimum 10dB.
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Test 12 tests the attenuator so it's normal test 12 fails. As the levels are off due to wrong attenuator some other test may be critical . Not a real problem
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Hello All;

Hello:? ?My tinySA appears to have an attenuator issue also... it's a real unit, from R&L. I have also verified the PCB etc.?
My testing shows a large attenuator error pic 1, and pict 2 shows the same for the calibration, it looks to be about 7dB low.?
To be honest, that doesn't bother me that much, the unit works for my needs. I don't need the tinySA to take accurate field strengths or absolute measurements.

However, when I trigger the self test, I get several errors,? Pic 3.? it shows Test 1 Above Critical, Test 10 Signal Level critical. TEst 12 Attenuator Fail.
I know about the display fail, no waterfall, that's not a big deal to me.?
My question is related to the operation, what do Test 1 and Test 10 test for and negative results mean??
Is the SA just uncalibrated, or are these errors critical and will they malfunction the unit in some way??
Is there a list of the test items, and what the errors mean? A TinySA for Dummies??

Cheers!

Steve?

I wonder if there are some static issues. Not having a schematic I wonder if there is ESD protection on the input. An analyzer that can only be used if it is in a static free environment is kinda limited especially with a plastic case.

John

Thanks, as long is you did not have the antenna close to a transmitter antenna it should be ok
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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