[srslte-users] Problems with LimeSDR Mini

[Nils Fürste]

Hi Ernesto,

I had some similar issues. I made it work by upgrading the firmware of 
the LimeSDR Mini to the newest version.

For that you have to build SoapySDR and LimeSuite from source and then 
upgrade the firmware of your LimeSDR. These tutorials may help you out 
if you need assistance:

https://en.dlyang.me/limesdr-mini-on-ubuntu/#method-two

https://wiki.myriadrf.org/LimeSDR_Firmware_Management

The author of the tutorial in the first links says that he has some 
problems with running SoapySDRUtil when it was build from source. This 
problem has been patched already, so don't worry about that.

Hope this helps!

Cheers

Nils

On 2019-12-01 15:16, Ernesto Xload wrote:

> Hello,
>
> I'm trying to make srslte work with limeSDR mini, when I start srsenb 
> I get the following result:
>
> Built in Release mode using commit 0e89fa9f on branch master.
>
> ---  Software Radio Systems LTE eNodeB  ---
>
> Reading configuration file /home/xload/.config/srslte/enb.conf...
> Opening 1 RF devices with 1 RF channels...
> Soapy has found device #0: addr=24607:1027, driver=lime, label=LimeSDR 
> Mini [USB 3.0] 1D3AD50A0B5D7B, media=USB 3.0, module=FT601, 
> name=LimeSDR Mini, serial=1D3AD50A0B5D7B,
> [INFO] Make connection: 'LimeSDR Mini [USB 3.0] 1D3AD50A0B5D7B'
> [INFO] Reference clock 40.00 MHz
> [INFO] Device name: LimeSDR-Mini
> [INFO] Reference: 40 MHz
> [INFO] LMS7002M calibration values caching Disable
> Setting up Rx stream with 1 channel(s)
> Setting up Tx stream with 1 channel(s)
> [INFO] RX LPF configured
> Set Rx bandwidth to 2.50 MHz
> [INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 5 
> MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not 
> active
> [INFO] TX LPF configured
> Set Tx bandwidth to 5.00 MHz
> Available device sensors:
>  - clock_locked
>  - lms7_temp
> Available sensors for Rx channel 0:
>  - lo_locked
> [ERROR] Tx Calibration: MCU error 4 (SXT tune failed)
> [INFO] Rx calibration finished
> State of gain elements for Rx channel 0 (AGC not supported):
>  - TIA: 9.00 dB
>  - LNA: 30.00 dB
>  - PGA: -4.00 dB
> State of gain elements for Tx channel 0 (AGC not supported):
>  - PAD: 45.00 dB
>  - IAMP: 0.00 dB
> Rx antenna set to LNAH
> Tx antenna set to BAND1
>
> Warning burst preamble is not calibrated for device lime_mini. Set a 
> value manually
>
> Setting frequency: DL=2685.0 Mhz, UL=2565.0 MHz
> Setting Sampling frequency 11.52 MHz
>
> ==== eNodeB started ===
> Type <t> to view trace
> [INFO] RX LPF configured
> Set Rx bandwidth to 8.64 MHz
> [INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 
> 8.64 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter 
> not active
> [INFO] TX LPF configured
> Set Tx bandwidth to 8.64 MHz
>
> Warning TX/RX time offset has not been calibrated for device 
> lime_mini. Set a value manually
>
> [INFO] Tx calibration finished
> [INFO] Rx calibration finished
> [WARNING] L
> [WARNING] L
> [WARNING] L
> [WARNING] L
> ...
>
> I calibrated the LimeSDR Mini with LimeSuiteGUI following this steps:
>     Open LimeSuite
>     Go to Options -> ConnectionSettings -> LimeSDR mini -> Connect
>     Go to “Calibrations” Tab.
>     Click “Default”
>     Click “Calibrate RX”
>     Go to the SXT tab
>     Click on “Calculate” in the “Frequency, MHz” section.
>     Click on “Tune” in the “Frequency, MHz” section.
>     Click on “Read” in the “VCO Comparators” section.
>     Go back to "Calibrations’ tab.
>     Click “Calibrate TX”
>
> If I try to calibrate without the SXT step I obtain the same MCU error 4.
>
> Can anybody help me?
>
> A lot of thanks in advance.
>
> _______________________________________________
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