Re: [Discuss-gnuradio] Delay

[Eric Blossom]

On Tue, Mar 04, 2008 at 11:32:46AM +0100, Per Zetterberg wrote:
> Dear All,
> 
> 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.

Eric