For the record and completeness I tried again with just the complex
int16 USRP Source and File Sink, setting "Unbuffered = off", and it
still bahaved the same. It may matter but it is not enough to make a
noticeable difference in this case.

- John

On Thu, May 7, 2015 at 2:27 PM,  <mle...@ripnet.com> wrote:
> Leave "unbuffered" = OFF.   This flag was added for "slow" file-sinks, when,
> for example, you're writing slow data to an external process via somehthing
> like FIFO, and you don't want the default stdio buffering to get in the way.
> The default, if you leave it off, is to use stdio buffering.

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