Re: [Discuss-gnuradio] Synchronization issue with multiple USRPs

[Marcus D. Leech]

On 25/05/2011 12:01 PM, Marc Epard wrote:
> On May 25, 2011, at 9:14 AM, Josh Blum wrote:
>
> > 2) Calibrate the setup. After you tune, the daughterboard LOs will have
> > different constant phase offsets.
> In my experience (with a WBX in a USRP2 and a DBSRX2 in an N210), the phase 
> offsets can change between bursts, not just when you retune. Is this not 
> supposed to be the case?
>
> -Marc
I think Josh had separately observed that the CORDIC phase accumulator 
gets reset between bursts, so the DDC phase isn't
  continuous, and thus offsets would be different.

An interesting test would be to do continuous streaming, and see that 
the phase offsets remain constant across a single tuning with
  a continuous stream.