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Re: [Discuss-gnuradio] Delay

From: Jeff Brower
Subject: Re: [Discuss-gnuradio] Delay
Date: Tue, 04 Mar 2008 08:45:06 -0600


> > I have made my own little program (based on libusrp) that reads data from a
> > file and sends it on the DAC of the USRP (basic db) and simultaneously
> > receives data and saves it on file. All at 2MHz sample-frequency.
> >
> > It seems to work well. But when I connect the DAC directly to the ADC I see
> > a delay of 7.65ms. I know that my program introduces some delay but not that
> > much (I believe). Does anyone know what the minimum delay would be and what
> > the contributing sources are ? Is it varying between different computers ?
> >
> > BR/
> > Per Zetterberg
> To reduce the delay, you'll want to specify the fusb_* parameters to
> the constructor.  This is assuming you're running under GNU/Linux.

After implementing Eric's advice, please post the minimum delay value you 
I'm interested to hear.  Thanks.


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