[srslte-users] ERROR when using LimeSDR-USB

Tue Mar 2 08:50:04 UTC 2021

Hi everyone，

I was trying to connect two LimeSDR-USB(one uesd by UE, the other one used by ENB) but something went wrong with one of them. When used by the UE, it seemed to be working well but unable to connect: 

linux; GNU C++ version 5.4.0 20160609; Boost_105800; UHD_003.010.000.HEAD-0-g6e1ac3fc

Reading configuration file /home/hadoop/.config/srslte/ue.conf...
WARNING: cpu0 scaling governor is not set to performance mode. Realtime processing could be compromised. Consider setting it to performance mode before running the application.

Built in Release mode using commit fd5cde5 on branch master.

Opening 1 channels in RF device=default with args=default
Opening USRP channels=1, args: 
/home/hadoop/Bjz_workplace/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.712: USRP reported the following error: LookupError: KeyError: No devices found for ----->
Empty Device Address

Soapy has found device #0: addr=1d50:6108, driver=lime, label=LimeSDR-USB [USB 2.0] 908340187222F, media=USB 2.0, module=FX3, name=LimeSDR-USB, serial=000908340187222F, 
Selecting Soapy device: 0
[INFO] Make connection: 'LimeSDR-USB [USB 2.0] 908340187222F'
[INFO] Reference clock 30.72 MHz
[INFO] Device name: LimeSDR-USB
[INFO] Reference: 30.72 MHz
[INFO] LMS7002M register cache: Disabled
Setting up Rx stream with 1 channel(s)
Setting up Tx stream with 1 channel(s)
[INFO] RX LPF configured
[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
Available device sensors: 
 - clock_locked
 - lms7_temp
Available sensors for Rx channel 0: 
 - lo_locked
State of gain elements for Rx channel 0 (AGC not supported):
 - TIA: 9.00 dB
 - LNA: 30.00 dB
 - PGA: -7.00 dB
State of gain elements for Tx channel 0 (AGC not supported):
 - PAD: 0.00 dB
 - IAMP: 0.00 dB
Rx antenna set to LNAL
Tx antenna set to BAND1
Waiting PHY to initialize ... done!
Attaching UE...
[INFO] Tx calibration finished
[INFO] Rx calibration finished
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-1.5 KHz
[INFO] RX LPF configured
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 11.52 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
RF status: O=0, U=0, L=2
[INFO] RX LPF configured
[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
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-1.7 KHz
[INFO] RX LPF configured
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 11.52 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
RF status: O=0, U=0, L=3
[INFO] RX LPF configured
[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
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-1.5 KHz
[INFO] RX LPF configured
RF status: O=0, U=0, L=1
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 11.52 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
Found PLMN:  Id=00101, TAC=7
[INFO] RX LPF configured
[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
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-1.4 KHz
[INFO] RX LPF configured
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 11.52 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
Stopping ..
^C---  exiting  ---

When used by the ENB, it showed ERROR:

linux; GNU C++ version 5.4.0 20160609; Boost_105800; UHD_003.010.000.HEAD-0-g6e1ac3fc

---  Software Radio Systems LTE eNodeB  ---

Reading configuration file /home/hadoop/.config/srslte/enb.conf...
WARNING: cpu0 scaling governor is not set to performance mode. Realtime processing could be compromised. Consider setting it to performance mode before running the application.

Built in Release mode using commit fd5cde5 on branch master.

/home/hadoop/Bjz_workplace/srsLTE/srsenb/src/enb_cfg_parser.cc.890: Force DL EARFCN for cell PCI=1 to 3400

Opening 1 channels in RF device=default with args=default
Opening USRP channels=1, args: 
/home/hadoop/Bjz_workplace/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.712: USRP reported the following error: LookupError: KeyError: No devices found for ----->
Empty Device Address

Soapy has found device #0: addr=1d50:6108, driver=lime, label=LimeSDR-USB [USB 2.0] 908340187222F, media=USB 2.0, module=FX3, name=LimeSDR-USB, serial=000908340187222F, 
Selecting Soapy device: 0
[INFO] Make connection: 'LimeSDR-USB [USB 2.0] 908340187222F'
[INFO] Reference clock 30.72 MHz
[INFO] Device name: LimeSDR-USB
[INFO] Reference: 30.72 MHz
[INFO] LMS7002M register cache: Disabled
Setting up Rx stream with 1 channel(s)
Setting up Tx stream with 1 channel(s)
[INFO] RX LPF configured
[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
Available device sensors: 
 - clock_locked
 - lms7_temp
Available sensors for Rx channel 0: 
 - lo_locked
State of gain elements for Rx channel 0 (AGC not supported):
 - TIA: 9.00 dB
 - LNA: 30.00 dB
 - PGA: -7.00 dB
State of gain elements for Tx channel 0 (AGC not supported):
 - PAD: 0.00 dB
 - IAMP: 0.00 dB
Rx antenna set to LNAL
Tx antenna set to BAND1

==== eNodeB started ===
Type <t> to view trace
[INFO] RX LPF configured
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 11.52 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
Setting frequency: DL=2685.0 Mhz, UL=2565.0 MHz for cc_idx=0
[ERROR] Tx Calibration: MCU error 5 (Loopback signal weak: not connected/insufficient gain?)
[INFO] Rx calibration finished

So how should I solve it? Thanks a lot!!!

Bao Jiazhong.