LimeSuiteNG: Transmitting raw I/Q samples from a file with LimeSDR Mini 2.0

[osqzss]

Thank you for the advice. However, even after commenting out all RX-related functionality, I still see occasional TX data drops at a 12 MHz sampling rate.

I am currently running limeTRX on a Windows 11 system. In the following post, oe1rsa reported stable TX at 40 Msps when running as root:

LimeMini Maximum stable USB3 Rate?

I finally found the root of the problems on my machine: LimeSuiteNG choose a very low batch size, amounting to mRx.packetsToBatch == 1 causing packet losses. As a “work around” I manually force the extra config to strcfg.extraConfig.rx.packetsInBatch = 8; This results in smooth operation with very low CPU utilisation and no data losses. (Tested with 4Msps over a period of 10 minutes, while doing email and internet surfing and no escalated privileges, i.e. as a normal user.) I also tried wi…

This makes me suspect that the issue may be related to the Windows environment. I will try running limeTRX on Ubuntu, using nice to increase its scheduling priority, and see if that improves the stability.