Re: [casper] Strange leakage effect in high decimation spectrometer in ROACH2

hi sabastian, what are your FFT settings? if you are processing a pure sine wave the signal will grow by a factor of two every stage (there are log2N stages - so if your spectrometer produces 1024 channels, it will have 10 stages). if you are starting the FFT by injecting your ADC at the most

Re: [casper] Strange leakage effect in high decimation spectrometer in ROACH2

That makes total sense, because when I drop the signal to lower values the behaviour disappear but this again reduce my available dynamic range :( I'm going to check every stage looking where the system saturates. Thanks for the idea! El vie., 6 sept. 2019 a las 0:43, Ross Martin () escribió: >

Re: [casper] snap_adc yellow-block behavior

Hi everyone, Short update: Problem is solved and the design is working as expected. I was using the ska-sa/casperfpga repository, when I installed the casper-astro/casperfpga everything start working as expected.