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Signal level too low #ultra


 

Hello,

I've got a tinySA Ultra in December 2022 and all was good (tests & calibration at least). I also have a tinySA non-ultra.
Yesterday while playing around, I've noticed that the signal level indicated by the Ultra is lower by about 10dB compared to the other.

I tried to do a self-test and level calibration and both failed (pictures attached).

I've cleared configuration and disabled "save config" in "presets" turned off and on (after a while as instructed by the seller) and measured the 30MHz CAL output signal which stays at ~-45dBm compared to the expected -35dBm. Measured the CAL signal with the other tinySA and it is around -35dBm so the output is good. Third picture is the CAL signal as measured by Ultra.
Is there anything else that can be done in terms of software/configuration or something is broken in hardware?
The system itself kinda works, but all signals are lower.


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