We noticed some curious jumps in the CLF power as measured by the CLF REFL PD. These jumps are also visible in CLF launch and rejected monitors. They are not visible in any of the other PDs on ISCT6 that are not associated with the CLF. See attached plot 1. We see coherent jumps in the RF output power readback of the 200MHz AOM driver. See plot 2.
The jumps in the CLF power are as large as 20%, whereas the RF power to the AOM only jumps by 5% or less.
These jumps are not visible in the RF chain of generating the 200MHz signal and leading to the green AOM driver. In any case, the observed RF power jumps cannot explain the observed light power changes.
80MHz RF source -►
80 MHz distribution amp -►
40 MHz divider -►
40 MHz distribution amp -►
200 MHz multiplier -►
200 MHz distribution amp -►
Green AOM driver
