On 2022-05-27 07:47, Anabel Almodovar wrote:
Hello,
I am trying to transmit a 200Msps signal with an X310 and a UBX-160
using the example code 'tx_samples_from_file.cpp'. The file contains
complex samples of type double. But I get Underflows constantly.
The host is an HP Z4 running Ubuntu 2020 and UHD 4.0. What could be
the problem? What characteristics should my host have to avoid underflows?
Thanks in advance,
Greetings
Anabel
You're asking your disk subsystem to operate at 1.6Gbyte/second. That's
unlikely to succeed, even with an SSD.
Try copying the file into a ramdisk, if it isn't too large.
I don't know anything about the Z4, but to support high sample rates,
your computer needs to be fast, multi-core, and have the fastest RAM
that can be
used in the system.
This document may also be useful:
https://kb.ettus.com/USRP_Host_Performance_Tuning_Tips_and_Tricks
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