Look at the Head and Tail blocks.
Dne 18.3.2014 14:27, Michael Dilmore napsal(a):
> Hello all,
>
> I'm new to GNU Radio and have a question that I hope more experienced users
> will find straightforward.
>
> I've successfully managed to create a flow graph that accepts an
> *infinite *stream
> of complex samples from an RTL-SDR source block. However, I only require
> 32,768 samples in total. Once the required number of samples have been
> received, the flow graph should write these samples (and only this number
> of samples, no more, no less) to a binary file.
>
> Is there an easy way to restrict the number of samples received in this
> way? I've looked at the documentation for the Message Passing and Stream
> Tagging APIs, but I'm not sure if they can be used to achieve the desired
> behaviour. As mentioned above, I'm using the RTL-SDR source block, but I'm
> guessing the same could be applied to any source block?
>
> Thanks in advance for you help!
>
> Michael Dilmore
>
