First I tried taking H1:IOP-LSC0_RLF_FREQ_OFS down towards zero but we lost FC lock at  H1:IOP-LSC0_RLF_FREQ_OFS = -8. FC would not re-lock until I brought it back to -15.

Wanted to scan FC de-tuning from -15 to -60 but the command didn't seem to work with negative steps.

Then 5s after moving FC detuning from -15 to -60, the IFO lost lock, 1437146099. The lockloss appears unrelated to the FC detuning change as the FC lost lock after we see  ETMX_L3 start to be unstable, plot. There was slightly increased noise at low frequency but not enough scatter to cause a lockloss.

Ideally would have ran ezcastep H1:IOP-LSC0_RLF_FREQ_OFS -s 30 '+1,45' to get 30sec steps from -60 to -15. We've been at -44 before with no issues, 83526, but wanted to make the low frequency noise worse to be able to fit to the best place.