Rahul, Jeff B.   

After relocking found ETM-Y Mode #20 was at 4.40 and climbing. 
At 22:20 (14:20) set the gain from 0.5 to 1.0. The mode continued to ring up. 
At 22:24 (14:24) with the mode up to 4.44 set the gain to 0.0. The mode is slowly coming down. At 23:20 (15:20) it is down to 4.43 and dropping.