[srslte-users] Runtime Error: multiple sampling rates

Thu Jun 3 10:04:58 UTC 2021

Hi, 
I am still getting the following error. The UE is only working with 2.5MHz BW and srate = 3.84.
I am using USRP N321 with Master clock rate = 245.76 MHz. Any idea why?
Thank you.

Best regards
Charbel

-----Original Message-----
From: Andre Puschmann <andre.puschmann at softwareradiosystems.com> On Behalf Of Andre Puschmann
Sent: Wednesday, June 2, 2021 5:42 PM
To: Charbel Lahoud <charbel.lahoud at etit.tu-chemnitz.de>; srslte-users at lists.softwareradiosystems.com
Cc: Brendan McAuliffe <brendan.mcauliffe at softwareradiosystems.com>
Subject: Re: [srslte-users] Runtime Error: multiple sampling rates

Hey,

On 2/6/21 17:23, Charbel Lahoud wrote:
> Hi,
> Thank you for your help. I have specified the srate on both USRPs for the eNB and UE. The eNB side is fixed, no error is shown anymore.
> On the UE side, I am still having different sampling rate even when it is specified. Any suggestions ?

yes, on the UE it's actually the "srate" param in the RF section. See [1] for reference.

The information is a bit spread across various documents it seems. We'll update the sections accordingly. Thanks for raising the issue.

Cheers
Andre

[1]
https://docs.srsran.com/en/latest/app_notes/source/5g_nsa/source/index.html#srsue

> 
> Best regards
> Charbel
> 
> 
> Built in Release mode using commit 45486b6e2 on branch HEAD.
> 
> 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.
> bOpening USRP channels=2, args: type=n3xx,master_clock_rate=245.76e6
> bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb[INFO] [MPMD] Initializing 1 
> device(s) in parallel with args: 
> mgmt_addr=192.168.10.2,type=n3xx,product=n320,serial=31D3A4A,claimed=F
> alse,addr=192.168.10.2,master_clock_rate=245.76e6
> [INFO] [MPM.PeriphManager] init() called with device args `master_clock_rate=245.76e6,product=n320,clock_source=internal,mgmt_addr=192.168.10.2,time_source=internal'.
> [INFO] [MPM.Rhodium-0] init() called with args `master_clock_rate=245.76e6,product=n320,clock_source=internal,mgmt_addr=192.168.10.2,time_source=internal'
> [INFO] [MPM.Rhodium-1] init() called with args `master_clock_rate=245.76e6,product=n320,clock_source=internal,mgmt_addr=192.168.10.2,time_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)
> Waiting PHY to initialize ... done!
> Attaching UE...
> /home/ubuntu18/srsRAN/lib/src/phy/rf/rf_uhd_imp.cc.929: 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.
> 
> /home/ubuntu18/srsRAN/lib/src/phy/rf/rf_uhd_imp.cc.983: 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.
> 
> .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=2, CFO=0.1 KHz .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=2, CFO=0.0 KHz .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=2, CFO=0.1 KHz .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=2, CFO=0.1 KHz
> 
> -----Original Message-----
> From: Andre Puschmann <andre.puschmann at softwareradiosystems.com> On 
> Behalf Of Andre Puschmann
> Sent: Wednesday, June 2, 2021 3:39 PM
> To: Charbel Lahoud <charbel.lahoud at etit.tu-chemnitz.de>; 
> srslte-users at lists.softwareradiosystems.com
> Subject: Re: [srslte-users] Runtime Error: multiple sampling rates
> 
> 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.ht
> ml
> 
> 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=
>> F
>> alse,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
>>
>>
>> _______________________________________________
>> srslte-users mailing list
>> srslte-users at lists.softwareradiosystems.com
>> https://lists.softwareradiosystems.com/mailman/listinfo/srslte-users
>>
> 
> 
> --
> Andre Puschmann
> 
> Software Radio Systems (SRS)
> https://www.srs.io
> andre at srs.io
> 
> PGP/GnuPG key: 7F4858D408EA231B
> fingerprint: 62C4 EE1C 69CE 9086 FB75 168A 7F48 58D4 08EA 231B
> 

--
Andre Puschmann

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

PGP/GnuPG key: 7F4858D408EA231B
fingerprint: 62C4 EE1C 69CE 9086 FB75 168A 7F48 58D4 08EA 231B
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