I have taken 2 fills, 10364 (March 13, 2009) and 10375 (March 16, 2009), and plotted the stability of the ADC pedestals and gains for all of the SMD slats as a function of time during the fill.  The goal is to note any significant variations in time. 

   The pedestal plots for fill 10364 for the four SMD planes, East Vertical, West Vertical, East Horizontal, and West Horizontal, are attached, and note that the error bars are smaller than the point size.  The time scale starts at run 10072078, the first useful run, and continues through 10072112.

   Likewise, the pedestal plots for fill 10375 are also attached for fill 10375, which occurred 3 days later.  The pedestals values are nearly the same as for fill 10364. 

   Comparing the average pedestal values between the two fills, the largest difference in the average values is less than 0.25 channel.  This brief study shows that the pedestals are stable to less than 0.25 channel.