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Re: [Discuss-gnuradio] Same File Size

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] Same File Size
Date: Wed, 29 Sep 2010 13:20:41 -0700
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Sep 29, 2010 at 04:14:18PM -0400, Justin Bracken wrote:
> Hello All,
> I am expecting to see a similiar file size in a simple test file that im
> running and I don't get that. Is there something Im missing?
> USRP2->FileSink
> SignalSource->Throttle->FileSink
> I have checked obvious things. The USRP2 block is set to a decimation of
> 400. Given the 100MS/s rate of the USRP2 I expect the stream to be 250e3
> MS/s. So I set the overall sample rate to 250e3. I have also set the
> datatypes of all the blocks to floats. The Throttle is set to 250e3.
> If it matters the  signal source is set to a saw tooth,1Hz.
> Im more interested in knowing that samples read back out of the files are
> synchronized. So I guess it doesn't matter if they are the same length if
> all this mean is that I need to trim the files to the same length.
> Thanks,
> Justin

If you want a particular number of samples in a file, etc., 
use gr.head.

Generally you SHOULD NOT be using throttle.

throttle causes so much confusion, I'm of the opinion that we should
remove it from the code base.


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