[srslte-users] Problems with LimeSDR Mini

[Ernesto Xload]

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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