I tried the antenna setting, None, NC, Hi, Lo and none of those work they just change the background of the waterfall.
LimeQuickTest=
->Device: LimeSDR Mini, media=USB 3.0, module=FT601, addr=24607:1027, serial= , HW=3, GW=1.30
Serial Number:
Chip temperature: 25 C
[ Clock Network Test ]
->REF clock test
Test results: 3051; 16247; 29444 - PASSED
->VCTCXO test
Results : 6711102 (min); 6711261 (max) - PASSED
->Clock Network Test PASSED
[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 13 0A 15 13 0A 15 02
->FPGA EEPROM Test PASSED
[ 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):
CH0 (SXR=1000.0MHz, SXT=1005.0MHz): Result:(-14.0 dBFS, 5.00 MHz) - PASSED
->Run Tests (TX_1 -> LNA_H):
CH0 (SXR=2100.0MHz, SXT=2105.0MHz): Result:(-14.1 dBFS, 5.00 MHz) - PASSED
->RF Loopback Test PASSED
=> Board tests PASSED <=
Elapsed time: 2.52 seconds
I also tried to follow this thread (LimeSDR USB Signal issue) but the links are dead so I did not get to diagnose anything HW related. Should I go to a really old firmware and try that?