[srsran-users] Sampling Rate Issue on N3xx

[Ofori Boateng, Joshua [E CPE]]

Hello Ismael,

Passing "type=n3xx,master_clock_rate=245.76e6" as "device_args" in the "rf_driver" section and setting the desired sampling rate [122.88e6] solved the issue. Thank you.


Best,
Joshua

Graduate Research Assistant
Department of Electrical and Computer Engineering
Iowa State University
Ames, IA.
________________________________
From: Ismael Gomez <ismael.gomez at srs.io>
Sent: Monday, February 27, 2023 2:12 PM
To: Ofori Boateng, Joshua [E CPE] <jboateng at iastate.edu>
Cc: srsran-users at lists.srsran.com <srsran-users at lists.srsran.com>
Subject: Re: [srsran-users] Sampling Rate Issue on N3xx

I just realized you will also need to set a different master_clock_rate for the N320, just pass: "type=n3xx,master_clock_rate=245.76e6" as "device_args" in the "rf_driver" section and the desired sampling rate.

On Mon, 27 Feb 2023 at 21:08, Ismael Gomez <ismael at srs.io<mailto:ismael at srs.io>> wrote:
Hi Joshua,

Have you tried using "srate" option in "rf_section"? You should use it to set a sampling rate supported by your radio. In this version you don't need to set any lte_sample_rate option.

On Mon, 27 Feb 2023 at 09:38, Ofori Boateng, Joshua [E CPE] <jboateng at iastate.edu<mailto:jboateng at iastate.edu>> wrote:
Hello folks,

I am running the new srsRAN project with N320 and I keep having the sampling rate issue below. On the 4G srsRAN code I used the expert.lte_sample_rates=true tag and works. Anyone knows how to enable this in the new code? Thank you.


Available radio types: uhd.

--== srsRAN gNB (commit 77be7d339) ==--

[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.0.0.HEAD-0-g90ce6062
Making USRP object with args 'type=n3xx,master_clock_rate=122.88e6'
[ERROR] [RPC] Invalid master clock rate: 122.88 MHz
[ERROR] [MPM.RPCServer] init() failed with error: Invalid master clock rate: 122.88 MHz
Failed to open device with address 'type=n3xx': RuntimeError: Error during RPC call to `init'. Error message: Invalid master clock rate: 122.88 MHz
srsGNB ERROR: Unable to create radio session.



Best,
Joshua

Graduate Research Assistant
Department of Electrical and Computer Engineering
Iowa State University
Ames, IA.
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