Hi All.
I purchased a LimeSDR back in April and it was working pretty well other than occasional calibration issues. Yesterday, I noticed transmission power to be well down and I could no longer calibrate the unit after many tries. I plugged the unit into my LimeRFE device and thats when it decided to fail. I tested the LimeRFE with a Lime Mini I have and there was no issues. I ran several board tests afterward and the RF tests fail. Is anyone able to offer advise?
[ TESTING STARTED ]
->Start time: Tue Aug 11 18:04:33 2026
->LimeSuite version: 20.10.0-g1480bfea
->Device: LimeSDR-USB, media=USB 3.0, module=FX3, serial=0009083401881A29, index=0, HW=4, GW=2.23
Serial Number: 0009083401881A29
Chip temperature: 39 C
[ Clock Network Test ]
->FX3 GPIF clock test
Test results: 18729; 22485; 26241 - PASSED
->Si5351C test
CLK0: 17554 / 17554 - PASSED
CLK1: 17554 / 17554 - PASSED
CLK2: 17554 / 17554 - PASSED
CLK3: 17554 / 17554 - PASSED
CLK4: 17554 / 17554 - PASSED
CLK5: 17554 / 17554 - PASSED
CLK6: 17554 / 17554 - PASSED
->ADF4002 Test
Result: 10 - PASSED
->VCTCXO test
Results : 5112967 (min); 5113105 (max) - PASSED
->Clock Network Test PASSED
[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 19 01 15 19 01 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 ]
Note: The test should be run without anything connected to RF ports
->Configure LMS
->Run Tests (TX_2-> LNA_L):
CH0 (SXR=800.0MHz, SXT=805.0MHz): Result:(-15.4 dBFS, 5.00 MHz) - PASSED
CH1 (SXR=800.0MHz, SXT=805.0MHz): Result:(-17.3 dBFS, 5.00 MHz) - PASSED
->Run Tests (TX_1 → LNA_W):
CH0 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-44.0 dBFS, -20.00 MHz) - FAILED
CH1 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-18.4 dBFS, 5.00 MHz) - PASSED
->Run Tests (TX_2-> LNA_H):
CH0 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-19.5 dBFS, 5.00 MHz) - PASSED
CH1 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-14.9 dBFS, 5.00 MHz) - PASSED
->RF Loopback Test FAILED
=> Board tests FAILED <=
Elapsed time: 4.63 seconds
The only other odd thing is that the Mini also fails some of the tests, but appears to work fine.
Shane.