LimeSDR Mini Test LNAW Fail


I have a LimeSDR Mini, with the QuickTest i have this output:

->Start time: Sun Feb 10 10:41:00 2019

->Device: LimeSDR Mini, media=USB 3, module=FT601, serial=1D40F7476890F5, index=0
Serial Number: 1D40F7476890F5

[ Clock Network Test ]
->REF clock test
Test results: 3787; 16984; 30181 - PASSED
->VCTCXO test
Results : 6711019 (min); 6711174 (max) - PASSED
->Clock Network Test PASSED

data: 18 06 29 18 06 29 2

[ LMS7002M Test ]
->Perform Registers Test
->External Reset line test
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD
Reg 0x20: value after reset 0x0FFFF
->LMS7002M Test PASSED

[ RF Loopback Test ]
->Configure LMS
->Run Tests (TX_2 -> LNA_W):
->On board loopback test:
Test 1:(SXR=1000.0MHz, SXT=1005.0MHz, TXPAD=8): Result:(-28.5 dBFS, 5.00 MHz) - FAILED
->Configure LMS
->Run Tests (TX_1 -> LNA_H):
->On board loopback test:
Test 1:(SXR=2100.0MHz, SXT=2105.0MHz, TXPAD=8): Result:(-16.8 dBFS, 5.00 MHz) - PASSED
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 4.93 seconds

Screen IMG

Is it normal??


I made this test both with Windows 10 than Ubuntu 18.04.
I don’t know if internal LNA is broken.
Anyone can suggest to me some test for verify that is all ok?

Thank You


It looks as though there has been damage to the TX_2 > LNA_W path, hence the reduced level. This could be physical damage or overload on input.


What could i do? Can i fix it?


It’s unlikely that this is something you could fix yourself, unless you can see physical damage and are confident in repairing this.


But i didn’t do anything strange… I ever used a simply dipole antenna. If is a damage on the board, like a capacitor, or resistor i can try to do something.
Otherwise i can’t do anything…