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Tnx for replaying,
it is not because of that as I was using the same cable, just in case.
So I first did test with that cable and that device failed, then put cable on second device that has passed the test...
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Please show the screen of the failing selftests, each failing step and the final screen --
Designer of the tinySA
For more info go to https://tinysa.org/wiki/
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Hi Erik, selftest screen looks like this 
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Either the input attenuator or the input switch is bad. Let it continue to the last test and post a picture of the selftests end screen --
Designer of the tinySA
For more info go to https://tinysa.org/wiki/
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It was not possible to go to next screen, at the screen where it stopped ( test 3 )? - once I touch screen it just exited test.
But somehow I did manage to calibrate it.
As before I did RESET CALIBRATION
Then did calibration but it has failed.
After that I have turned on internal 30MHz calibration adjusted level in settings to that value - I think it is -38dBm
I have also checked with generated signal like -30dBm from other tiny and it was OK.
Then I started calibration and all went OK
Now self test is passing all tests.
Then I RESET and redo calibration on second device and got same problem with calibration failed and just did everything as on first device, and got it calibrated.
In any way I have solved my problem so it does not look as HW fault.
Many thanks for replays...
Goran
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Hello,I bought my tinysa ultra from zeenko store in 2023.. When I tried to make selftest with 1.4.175 version i had "test 3" failing.. My cable is a 18 ghz test cable so I dont think it is a cable issue, so when I tried to make some level changes, now I have fail 3,4,14 signal level critical. I have a power sensor down to -30 db so I dont have much chance to measure exact values and recalibrate.. I'd be glad if somebody can point me to right direction.. So why did i run selftest/cal at the first place.. I was measureing NF of a working LNA and I was seeing some very weird values like -5 -6dB (should be poisitive right?) on PGA103 so I thought it might be something about calibration  
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This hints at a blown input switch. Could you check with your power detector if the output in signal generator mode is also 10 dB low? E.g. maximum -28 dBm instead of the indicated -18 dBm? The wiki contains the type number and location of the input switch, it is user replaceable with some expertise in SMD soldering. --
Designer of the tinySA
For more info go to
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When I enable LO mode I get about -9.7dB from CAL port.
On signal generator mode,
when I set 2.4 GHz, -18.5 dB output (cant?go higher than this) I measure -26.5? dB
Erik Kaashoek via <erik= [email protected]>, 14 Tem 2024 Paz, 17:46 tarihinde ?unu yazd?:
This hints at a blown input switch.
Could you check with your power detector if the output in signal generator mode is also 10 dB low?
E.g. maximum -28 dBm instead of the indicated -18 dBm?
The wiki contains the type number and location of the input switch, it is user replaceable with some expertise in SMD soldering.
--
Designer of the tinySA
For more info go to
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On Sun, Jul 14, 2024 at 08:22 AM, Oguzhan Kayhan wrote:
when I set 2.4 GHz, -18.5 dB output (cant?go higher than this)
I measure -26.5? dB
This is consistent with a faulty switch at the input ? --
Designer of the tinySA
For more info go to
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14 Tem 2024 Paz 19:54 tarihinde Erik Kaashoek via <erik= [email protected]> ?unu yazd?:
On Sun, Jul 14, 2024 at 08:22 AM, Oguzhan Kayhan wrote:
when I set 2.4 GHz, -18.5 dB output (cant?go higher than this)
I measure -26.5? dB
This is consistent with a faulty switch at the input
?
--
Designer of the tinySA
For more info go to
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Hi, I hope reply to top msg is the right way to put a post in here.
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My beloved TinySA Ultra is suddenly failing self-test #14.
Error message is: "Test 14: Signal level critical".
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Also, Level Calibration (100kHz - 5,340GHz) fails with "Signal level incorrect". I've tried both supplied cables. Same error.
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Unit was purchased from Eleshop.
Firmware is: tinySA4_v1.4-177-g1687fbc.bin
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Please advise.
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Best wishes,
Henrik, Denmark.
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Can you post a screenshot of the failing test?
--
Designer of the tinySA
For more info go to
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Thanks for your prompt response, Erik. Below are screenshots (photos) of the TinySA Ultra failures. I hope the images are good enough.
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Failing self-test #14
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Failing level-calibration:
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PS: The text on the back of the TinySA incl. serial# is unfortunately rubbed out from being taken everywhere in my backpack, but I have the invoice from Eleshop.
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Best wishes,
Henrik
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Can you do a CONFIG/MORE/CLEAR CONFIG 1234
Hope this helps the calibration to succeed
--
Designer of the tinySA
For more info go to
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Hi Henrik, if you still can't get past selftest after executing CLEAR CONFIG, the input RF switch and LNA may be damaged.
This is usually damage caused by an over-limited signal being fed into the RF port.
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input RF switch U22:AS179-92LF
LNA U14:BGA2817
You can try replacing them.
?
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Hi Hugen, thanks for your detailed reply.
No, my TinySA doesn't pass self-test 14 even after config->more->clear config.
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Thanks for listing the replacement component parts.
I think I found them on Mouser. Could you kindly take a look and verify that the below links represent the correct parts?
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RF Switch
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BGA2817,115
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Best wishes,
Henrik, Denmark
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PS: Don't know if its relevant, but my TinySA passed the attenuator-test as described in the wiki: https://tinysa.org/wiki/pmwiki.php?n=Main.CheckTheAttenuator
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On Wed, Aug 14, 2024 at 01:11 AM, <tinysa@...> wrote:
PS: Don't know if its relevant, but my TinySA passed the attenuator-test as described in the wiki:
? ?Erik's original design put the LNA behind the attenuator so that the attenuator could protect the LNA. Unfortunately, he had to change the design due to the large number of spurious signals this resulted in during testing. The current design eliminated the spurious, but since the RF switch and LNA are connected directly to the SMA port, they are susceptible to damage from excessive input signals.? The LNA should only be used when measuring very low-level signals and after ensuring there are no other high-level signals in the passband.
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? The current version is a trade-off between performance, reliability and cost, and as a test instrument, Erik prioritized performance.
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Herb
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This test checks all attenuator steps, not the absolute level of the input signal
--
Designer of the tinySA
For more info go to
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Hello, it also happened to me after updating the firmware on TinySA that it weakened the signal on the low port, and it didn't pass the calibration test or the self-test.. attenuator fail.. (I immediately thought it was a clone but it doesn't seem to be) when I tested the attenuator, the line was flat but with a weakened signal -90db. I opened TinySA and took the oscilloscope in my hands to find where the 30 mhz signal weakens or breaks. it turned out behind L12 and C34 in parallel, (L12 in interruption).. while struggling, he soldered one of the 330 nH inductors, I didn't have a smaller one and I don't know what the values ??are, and tiny and calibration and selftest worked, it just seems to me that it's not a sinusoid at low output, the best.. I would ask you Erik to send me the inductance and capacitance values ??of LPF HW = v0.3.1_E thanks in advance.. :)
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