Gain Notes for Revolution 33 JEM-X1: No data or gain history for this unit JEM-X2: A quite normal and quiet revolution with fine gain smoothing, all the data from this revolution should be useable. This is equally true for the arc/rev_2 001 processing and the 002 processing. Many small glitches are clearly visible thanks to the generally low noise level. especially on sources 2 (yellow/pink) and 3 (blue/green) which are always the least noisy sources. Source 4 is (purple/orange) already demonstrating relatively high noise. Later the position of this source becomes so unstable that it becomes unuseable. The first 5-7 points on each curve belong to the partial switch on period at the beginning of the revolution where the unit is switched on initially at three steps below the nominal high voltage (HV) setting. This was done to protect the unit from the very high gain seen after activation at the begining of the mission. This revolution reprocessed with latest software March 2006. CAO 14/03/2006