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[[Category:Block Docs]]
 
[[Category:Block Docs]]
This is a hier block, consisting of a [[FFT Filter]] block and a [[Rotator]] block.  It performs the same function as the [[Frequency Xlating FIR Filter]], except using an [[FFT Filter]]. See [[Frequency Xlating FIR Filter]] for more information.
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This is a hier block, consisting of a [[FFT Filter]] block and a [[Rotator]] block.  It performs a frequency translation on the signal, as well as downsamples the signal by running a decimating FIR filter on it.  It can be used as a channelizer, to pull out a narrowband portion of a wideband signal, without that narrowband portion having to be centered in frequency. 
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[[File:freq-xlating-filter.png|250px]]
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(note- taken from http://blog.sdr.hu/grblocks/xlating-fir.html)
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See [http://blog.sdr.hu/grblocks/xlating-fir.html this page] or [http://www.andrej-mohar.com/frequency-xlating-fir-filter-and-channeling-basics-in-gnuradio this page] for more details.
  
 
== Parameters ==
 
== Parameters ==

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