Thanks Jason.

On Wed, May 20, 2009 at 10:16 AM, Jason Uher <[email protected]> wrote:

> >  I don't understand why is it that the
> > usrp_source writes some junk data to the file_sink even when I am not
> > transmitting from the other USRP. Is it possible that it might be picking
> up
> > some stray signals at 2.4GHz?
>
> The USRP receiver has no idea when the transmitter is sending, all it
> does it step down the signal and spread it out.  If there is nothing
> there you will still get junk, especially if you are using some form
> of agc which will make your amplitudes constant even if there is very
> little power.
>
> You can try to record only when the transmitter is on through
> judicious use of gr.pwr_squelch_cc with the gating turned on.
>
> Jason
>
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