Re: [Discuss-gnuradio] Unexpected issue with file source and USRP source

[Martin Braun (CEL)]

On Thu, Dec 12, 2013 at 03:54:29PM +0500, Maria Stevens wrote:
> So, Only case 1 is working for me. I am not using any custom gnuradio-block in
> my receiver. Major blocks in my demodulator chain consists of FIR filters,
> gr_pfb_clock_sync_ccf and packet decoder along with some adders subtractors
> etc. what is the difference caused by the same demodulator chain when reading
> data directly from usrp source and from file source? is it because some of the
> demodulator chain blocks are causing back pressure due to taking too much time
> in processing but when run in real time it causes data loss during exchange of
> samples between blocks.  I am confused if in real time the
> gr_pfb_clock_sync_ccf block or any other major block stucks in processing
> during which samples are lost due to new incoming samples.

Are you observing overflows? If so, have you tried reducing the
bandwidth and see if that helps?

MB
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