[Discuss-gnuradio] Comb filter generation

[Marcus Leech]

I have a non-sinusoidal signal at frequency X, which is sampled at 
exactly 100X, and I want to filter
 it so that only X, and its harmonics are present in the output 
signal.  That sounds to me like
 a comb filter--what's the most efficient way to express such using 
gr_fir_filter_fff() ?

[For the curious, this is part of my pulsar monitoring/detection software].

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