I recall that that was what you had mentioned yesterday, but could you
explain why setting it to 15M will allow me to grab 30M?


On Tue, Nov 19, 2013 at 6:17 PM, Tom Rondeau <[email protected]> wrote:

> On Tue, Nov 19, 2013 at 6:35 PM, Paul B. Huter <[email protected]>
> wrote:
> > I am trying to deploy my radio application (using GRC), and I am running
> > into a problem. I am sampling at 50MHz and trying to pare things down to
> > 30MHz using a Low Pass Filter, defined as follows:
> >
> > Decimation = 50
> > Gain = 1
> > Sample Rate = samp_rate (50M)
> > Cutoff Freq = 30000000 (30M)
> > Transition Width = 1000 (1k)
> >
> > I get an error telling me cutoff frequency is greater than sample rate /
> 2
> > (30 > 50/2).
> >
> > How can I get down to 30MHz? I do intend to look at smaller "chunks" of
> data
> > at a time, so I am perfectly okay with taking data at 50MHz and cutting
> it
> > down later, I just wanted to avoid gather unnecessary data.
> >
> > Thanks!
>
> Set the cutoff freq to 15M, not 30M.
>
> Tom
>
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