LimeSDR Mini RMA Request

I have a LimeSDR Mini purchased from Mouser, still within warranty. I have had problems since I first purchased it but have finally worked out what is going wrong:

When it is cold (room temperature), and I am trying to set a receive frequency of 437 MHz, I get the following error from LMS_Init:

SetFrequencySXT(1240.01 MHz) - cannot deliver frequency

Once the LimeSDR warms up, it works OK, so it does not seem to be an application problem. I have swapped out with a friend’s LimeSDR Mini on the same hardware and that works perfectly, cold or hot. USB supply voltage measured on the LimeSDR Mini edge connectors is 5.1v.

LimeQuickTest when cold (and nothing connected to the SMAs) seems to suggest the same fault:

pi@raspberrypi:~ $ LimeQuickTest
->Start time: Wed Mar 30 12:21:46 2022
->LimeSuite version: 20.10.0-unknown
->Device: LimeSDR Mini, media=USB 3.0, module=FT601, addr=24607:1027, serial=1D750851EC1757, HW=3, GW=1.30
  Serial Number: 1D750851EC1757
 Chip temperature: 20 C

[ Clock Network Test ]
->REF clock test
  Test results: 54542; 2203; 15400 - PASSED
->VCTCXO test
  Results : 6711006 (min); 6711162 (max) - PASSED
->Clock Network Test PASSED

->Read data: 15 05 18 15 05 18 02

[ 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
SetFrequencySXT(1240.01 MHz) - cannot deliver frequency
->Run Tests (TX_2 -> LNA_W):
SetFrequencySXT(1005 MHz) - cannot deliver frequency
->Run Tests (TX_1 -> LNA_H):
SetFrequencySXT(2105 MHz) - cannot deliver frequency
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 2.39 seconds

Please could you authorise an RMA so that I can get a refund and wait for a LimeSDR Mini V2?



Just to check, which model of Raspberry Pi are you using?

All the tests have been with various RPI4 model B’s.

@Zack would appreciate it if you could take a look and confirm if RMA is appropriate.

Hi Gareth,

Reach the seller for RMA. Sorry for inconvenience.