Re: [time-nuts] 1/f^2 noise

2014-11-25 Thread Magnus Danielson
Jim, I assume from your previous comments that you went the FFT way. As I was flying I had some time to kill, so I read some papers. You should be reading FFT-Based Methods for Simulating Flicker FM by Charles A. Greenhall of JPL. If you read it carefully enough you will find several methods

[time-nuts] 1/f^2 noise

2014-11-24 Thread Jim Lux
Started plotting some sampled data from my experimental system, and interestingly, it seems to have a 1/f^2 slope, rather than a 1/f slope. I had expected the amplifier noise to dominate, but perhaps one of the myriad other noise sources is contributing as well (e.g. sample clock jitter, ADC