Hello,

I've been looking for the most efficient way of "bandpass" filtering
bins in a fsig for a realtime instrument. What I want to do is to be
able to split an fsig into different fsigs containing diferent bin
sections (for independent processing). I guess I could use the pvsftr
and pvsftw opcodes together with the vectorial opcodes to alter the
table, but I was wondering if I'm missing any other way of doing it
more CPU efficient without having to rewrite tables (I want to be able
to change the ranges realtime). Also I thought about using pvstencil
but again it requires rewriting tables. What about pvsbufread? Would
it work without adding any delay? (setting the read pointer to equal
the write pointer?)... I know, I should just experiment myself and
find out the best way, but I just wanted to make sure I'm not missing
an obvious way of efficiently doing this.

On the request side: It could be nice to have an opcode for doing
this, one that simply takes a fsig and two k-rate parameters for the
lowest and highest bin and outputs another fsig containing only those
bins with the rest zeroed.


Thanks!


Hector