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Re: [Discuss-gnuradio] Why does increased Samples per Symbol result in


From: Mir M. Ali
Subject: Re: [Discuss-gnuradio] Why does increased Samples per Symbol result in underruns?
Date: Mon, 20 Jul 2009 21:10:07 -0500

Does that mean that the data being sent is lost or is it just that USRP is waiting for it to arrive?

On Mon, Jul 20, 2009 at 6:30 PM, Eric Blossom <address@hidden> wrote:
On Mon, Jul 20, 2009 at 05:29:02PM -0500, Mir M. Ali wrote:
> Hi,
> I used benchmark_tx.py with dbpsk modulation with Samples per symbol=7 and
> higher. I found that this resulted in lots of USRP underruns(uU). Why is it
> so?

You're doing more work per symbol.  The uU indicates that the host is
not sending data to the USRP fast enough.

Eric


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