[Uchiyama, Ushiba]

Since MNV OpLev SUM values were less than 400 in this morning, we increased laser output of MNV OpLev at EY.
Initially, displayed laser power was 0.75 W (fig1).
First, we turned off the laser and turn it on again to see if the laser power comes back by turning off/on the laser.
Unforetunately, the laser power was not recovered, so we increased the displayed laser output to 2.5 W (fig2).

Figure 3 shows the opLev values during the work.
T cursors show the time when we started and finished our work.
Laser power was increased but no significant difference can be observed in the MNV signals, so we can still use the MNV signals as a height reference.