RF loopback failure - LimeSDR USB

#1

Hello
I am new to LimeSDR And I was following the Quick-start procedure and it worked fine.
But after limesuite suggested an update “LimeSuite --update” I had a loopback failure.

These are some details that might help to solve the issue:

$ LimeUtil --find

  • [LimeSDR-USB, media=USB 2.0, module=FX3, addr=1d50:6108, serial=00090726074F311E]

$ LimeUtil --info
######################################################

LimeSuite information summary

######################################################

Version information:
Library version: v19.04.0-myriadrf1~bionic
Build timestamp: 2019-05-13
Interface version: v2019.1.0
Binary interface: 19.04-1

System resources:
Installation root: /usr
User home directory: /home/nechi
App data directory: /home/nechi/.local/share/LimeSuite
Config directory: /home/nechi/.limesuite
Image search paths:
- /home/nechi/.local/share/LimeSuite/images
- /usr/share/LimeSuite/images

Supported connections:

  • FT601
  • FX3
  • PCIEXillybus

----------------------------------------------------

$ LimeUtil --update
Connected to [LimeSDR-USB [USB 2.0] 90726074F311E]
Existing firmware is same as update (4)
Existing gateware is same as update (2.21)
Firmware and Gateware update is not required.

Programming update complete!

And bellow you find the Quick test result

$ LimeQuickTest --no-gui
[ TESTING STARTED ]
->Start time: Fri May 31 17:55:18 2019

->Device: LimeSDR-USB, media=USB 2.0, module=FX3, addr=1d50:6108, serial=00090726074F311E
Warning: USB3 not available
Serial Number: 00090726074F311E

[ Clock Network Test ]
->FX3 GPIF clock test
Test results: 36995; 40751; 44507 - 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 : 5112913 (min); 5113045 (max) - PASSED
->Clock Network Test PASSED

[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 12 08 07 12 08 07 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
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
LML RX phase search FAIL
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
LML TX phase search FAIL
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
LML RX phase search FAIL
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
SetPllFrequency: error configuring phase
LML TX phase search FAIL
Failed to set sample rate
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 3.32 seconds

Please tell me what to do to fix the problem, Because I dont think that it is a HW issue

Thank you

#2

Hi @nechi,

Use USB3 instead of USB2, please.

#3

I am already using it. and seemed weird to me.
Could that be the problem? if yes how can I fix it please?

#4

It reports USB2. Check/try another USB cable, try another USB3 port.