Dichroic Control
to take the dichroic out (from https://www.keck.hawaii.edu/twiki/bin/view/Main/PyWfsOpsRevert):
m obdbnmdm=home
or
m obdb=0
check with s obdb
must be ~0.mm for home
to put the dichroic in as pwfs@vm-pwfsserver
prtcInsertDichroic
Modulator:
must be between 0 and 1V
so the position must be 0< | center + amplitude| < 1
scale is ~ 1V/arcsec