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pyrpl-fpga / pyrpl

pyrpl turns your RedPitaya into a powerful DSP device, especially suitable as a lockbox in quantum optics experiments.
http://lneuhaus.github.io/pyrpl/
MIT License
139 stars 110 forks source link

IIR module gain has to be set too small #529

Open peteasa opened 4 days ago

peteasa commented 4 days ago

I have been using the IIR module to try and understand how to configure digital filters. I have a demonstration that is easy to read here. And have been exploring resonance here. However I seem to have to set the IIR module gain to rather small values to get a working filter. Being new to pyrpl I would welcome someone who has knowledge of this area of the code to review my findings and give me a hint about how to either debug the IIR module or fix my code!