(Log on 14th)

I investigated the glitches (Fig.1) in the H2 OSEM of the OMMT1 suspension. When the D-sub cable was disconnected from the feedthrough, the glitches disappeared. The LED's voltage drop in forward bias decreased.

I found the shield lines in the D-sub cables for H2 and H3 disconnected from the satellite box (arrows in Fig.2). Connecting the shield lines reduced the high-frequency noises (Fig.3), but the glitches did not disappear.