[srslte-users] Runtime Error: multiple sampling rates

[Andre Puschmann]

Hey,

for the N3xx as well as for the X3xx you need to specify the sample rate
for dual channel configs (MIMO, carrier aggregation, etc). See [1] for
reference.

Just add your desired rate, i.e. "sampling_rate=15.36e6" to the device args.


Cheers
Andre


[1] https://docs.srsran.com/en/latest/app_notes/source/2ca/source/index.html

On 2/6/21 13:13, Charbel Lahoud wrote:
> Hi,
> 
>  
> 
> Any suggestions why transmission modes 2-4 aren’t working with my setup
> and how to fix this USRP Error?
> 
> Radio used: USRP N321
> 
> Connection: cables with 30 dB attenuator on each
> 
>  
> 
> Best regards
> 
> Charbel
> 
>  
> 
> Reading configuration file /home/ubuntu18-sdr/.config/srslte/enb.conf...
> 
> Built in Release mode using commit 45486b6e2 on branch HEAD.
> 
> /home/ubuntu18-sdr/srsRAN/srsenb/src/enb_cfg_parser.cc.890: Force DL
> EARFCN for cell PCI=1 to 3350
> 
>  
> 
> Opening 2 channels in RF device=default with args=default
> 
> [INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501;
> UHD_3.15.0.0-62-g7a3f1516
> 
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
> 
> Opening USRP channels=2, args: type=n3xx,master_clock_rate=245.76e6
> 
> [INFO] [MPMD] Initializing 1 device(s) in parallel with args:
> mgmt_addr=192.168.10.2,type=n3xx,product=n320,serial=31EABBA,claimed=False,addr=192.168.10.2,master_clock_rate=245.76e6
> 
> [INFO] [MPM.PeriphManager] init() called with device args
> `mgmt_addr=192.168.10.2,product=n320,time_source=internal,master_clock_rate=245.76e6,clock_source=internal'.
> 
> [INFO] [MPM.Rhodium-0] init() called with args
> `mgmt_addr=192.168.10.2,product=n320,time_source=internal,master_clock_rate=245.76e6,clock_source=internal'
> 
> [INFO] [MPM.Rhodium-1] init() called with args
> `mgmt_addr=192.168.10.2,product=n320,time_source=internal,master_clock_rate=245.76e6,clock_source=internal'
> 
> [INFO] [0/Replay_0] Initializing block control (NOC ID: 0x4E91A00000000004)
> 
> [INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000000320)
> 
> [INFO] [0/Radio_1] Initializing block control (NOC ID: 0x12AD100000000320)
> 
> [INFO] [0/DDC_0] Initializing block control (NOC ID: 0xDDC0000000000001)
> 
> [INFO] [0/DDC_1] Initializing block control (NOC ID: 0xDDC0000000000001)
> 
> [INFO] [0/DUC_0] Initializing block control (NOC ID: 0xD0C0000000000000)
> 
> [INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000)
> 
> [INFO] [0/FIFO_0] Initializing block control (NOC ID: 0xF1F0000000000000)
> 
> [INFO] [0/FIFO_1] Initializing block control (NOC ID: 0xF1F0000000000000)
> 
> [INFO] [MULTI_USRP]     1) catch time transition at pps edge
> 
> [INFO] [MULTI_USRP]     2) set times next pps (synchronously)
> 
> /home/ubuntu18-sdr/srsRAN/lib/src/phy/rf/rf_uhd_imp.cc.928: USRP
> reported the following error: RuntimeError: Multiple sampling rates
> upstream of RX Terminator 0: RuntimeError: Node 0/DDC_0 specifies
> 1.536e+07, node 0/DDC_1 specifies 1.92e+06.
> 
>  
> 
> ==== eNodeB started ===
> 
> Type <t> to view trace
> 
> /home/ubuntu18-sdr/srsRAN/lib/src/phy/rf/rf_uhd_imp.cc.982: USRP
> reported the following error: RuntimeError: Multiple sampling rates
> upstream of RX Terminator 0: RuntimeError: Node 0/DDC_0 specifies
> 1.536e+07, node 0/DDC_1 specifies 1.92e+06.
> 
>  
> 
> Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz for cc_idx=0
> 
> 
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> 


-- 
Andre Puschmann

Software Radio Systems (SRS)
https://www.srs.io
andre at srs.io

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