Sheila, Craig

Today Sheila switched the DARM control from ETMX to ITMX while we were in NOMINAL_LOW_NOISE.  She asked me to take DARM spectra before and after the switch.

The green and brown are from before the switch, when DARM control was on ETMX.  The red and blue are from after.

We have coherence between the EFM and DARM from 2-5 Hz when DARM control is on ETMX, otherwise there are no detectable electric fields below 5 Hz.