1. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12006 |Half Wave Control for PD power adjustment for IMC/IFO REF PD/QPD]] (T.Yamamoto 191208)
  * Login k1ctr* (* : 1~9).
  * Go to [[http://k1sum0.kagra.icrr.u-tokyo.ac.jp/~controls/Manual/img/sitemap.png|Sitemap]] and Select "SYS", then "HWP motor".
  * Push "FWD" or "REV" In [[http://k1sum0.kagra.icrr.u-tokyo.ac.jp/~controls/Manual/img/SYS/SYS-HWP.png|Controller]] to rotate each HWP. <<BR>>Related EPICS channels are defined in k1grdconfig (K1:SYS-HWP_***).