Re: [Discuss-gnuradio] Not recording it all

[Paul B. Huter]

Thanks, Tom. Just to clarify, the 1Msps comes from the sample rate of 50M and the decimation of 50, correct? Also, is this going to record 10 seconds of "real-time" data? I was having issues with real-time, due to the large data stream, so will this record data from t=0 to t=10, just not in real-time?

Paul B. Huter

On Nov 23, 2013 9:54 AM, "Tom Rondeau" <address@hidden> wrote:

On Sat, Nov 23, 2013 at 10:44 AM, Paul B. Huter <address@hidden> wrote:
> I ran my "record" setup for over 10 seconds, but when I run the data file
> back through my "playback" I only get about two seconds (if that) of result.
> What happened to all the data, and how can I change things next time to get
> all the data?
>
> My record setup is as follows:
>
> Rate: 50M
> USRP Source
> Low Pass Filter
>      Decimation: 50
>      Cutoff Freq: 15M
>      Transition Width: 5M
> File Sink
>
> Paul B. Huter


Try this. You only want to capture for a certain length of time, which
means a certain number of samples. So put a gr::blocks::head block
between the filter and file sink. The number of items you'll want is
going to be samp_rate (samps/sec) * time (secs) (and we know samp_rate
here is 1 Msps). That will store exactly that many samples and then
shut down the application.

Tom