Re: [Discuss-gnuradio] RA:FFT

[Marcus D. Leech]

On 12/29/2015 01:01 PM, Simon Olvhammar wrote:
> Hi,
>
> I have a question regarding the block RA:FFT in the RA Blocks package.
> If I set, for example, the decimation at 100 does this mean that only 
> 1 in 100 items will be kept?
> In that case it would occur to me if, I do say a measurement of 100 
> minutes at a signal, I only get 1 minute of data?
>
> Best regards
> Simon
>
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No, the decimation is applied to FFT *output* frames, after 
integration.   It is typically the case that in radio astronomy spectrometry
  that you integrate spectra over some time period, since the SNR is 
typically quite poor.