Hi, the Lime SDR mini on GB3CT's transmitter appears to have ceased functioning as there is no RF output from it. It has been working ok, but stopped transmitting last week. The SDR LEDs are flashing and the Pi is communicating OK with it as I have tried the Lime diagnostic function in the menu which talks to the Lime OK. It reports a board failure on the loopback test, which I assume is due to no loopback connection between the SMA ports?
Can anyone advise upon any further diagnostic steps to take to find where the problem is?
Thanks, G7KPM
Lime SDR Mini problem - no RF output
Forum rules
This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.
Thank you
This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.
Thank you
Re: Lime SDR Mini problem - no RF output
Hi Jason
If you go to the ssh prompt and run Then post the resulting text here and we can see what the failure is.
Marginal test failures are normal. Here's one that I use all the time:
Dave
If you go to the ssh prompt and run
Code: Select all
LimeQuickTest
Marginal test failures are normal. Here's one that I use all the time:
Code: Select all
pi@raspberrypi:~/rpidatv $ LimeQuickTest
[ TESTING STARTED ]
->Start time: Tue Aug 17 21:41:43 2021
->LimeSuite version: 20.10.0-unknown
->Device: LimeSDR Mini, media=USB 3.0, module=FT601, addr=24607:1027, serial=1D4C2CAE8C28A4, HW=2, GW=1.30
Serial Number: 1D4C2CAE8C28A4
Chip temperature: 25 C
[ Clock Network Test ]
->REF clock test
Test results: 36657; 49854; 63051 - PASSED
->VCTCXO test
Results : 6711006 (min); 6711164 (max) - PASSED
->Clock Network Test PASSED
[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 13 02 0C 13 02 0C 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:(-18.6 dBFS, 5.00 MHz) - PASSED
->Run Tests (TX_1 -> LNA_H):
CH0 (SXR=2100.0MHz, SXT=2105.0MHz): Result:(-20.2 dBFS, 5.00 MHz) - FAILED
->RF Loopback Test FAILED
=> Board tests FAILED <=
Elapsed time: 2.79 seconds
Re: Lime SDR Mini problem - no RF output
Have you tried re flash 1.30 or re upload dvb firmware.
Rob
Rob
Re: Lime SDR Mini problem - no RF output
Thanks for the replies. A Lime firmware reflash appears to have solved the problem, so not sure what has happened there!
Panic over!
Thanks again,
Jason G7KPM
Panic over!
Thanks again,
Jason G7KPM