Top plot:
IM2 LR OSEM noise rises above other IM OSEMS around 135Hz.
At 570Hz, IM2 LR OSEM in blue in top plot is ~15x the noise of the IM3 LL, ~60x the noise of IM1 UR, and ~90x the noise of IM4 LR
Bottom Plot:
OSEM noise shows up in pitch signal