Same File Size

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

On Wed, Sep 29, 2010 at 04:14:18PM -0400, Justin B. wrote:

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.

Eric

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