On 2025-07-30 02:45, gech...@gmail.com wrote:

Hello,

I’m using USRP X310 devices on both the transmitting and receiving ends to handle a data stream. During transmission, I run the following command:

/usr/lib/uhd/examples/tx_samples_from_file --freq 2484e6 --rate 20e6 --gain 10 --wirefmt sc16 --ref=internal --file /home/ubuntutx/uhd/examples/tx_transmit_data.dat --repeat

I encounter consistent underflow issues (indicated by "U" messages in the console), regardless of the sample rate used. Could you please advise how to modify my setup or code to enable stable transmission and reception without these underflow errors?

Thank you,

Getaneh Berie


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I'll note that 20msps is 80Mbyte/second.   If your disk subsystem cannot sustain this rate, you'll get under-runs.

If your file can fit on ram-disk, move it there.

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