We are experiencing some problems with horizontal high frequency banding
across our image screen when running the confocal.  The banding is a
series of light and dark bands which cut across the screen from one end
to the other.  It doesn't seem to be a result of vibration.  It could
possibly be line noise or from the laser power supply or other
electrical noise.  We have a small surge protector on the electrical
line.
 
Has anyone else experienced these problems?
 
Paul Anderson
Thomas Jefferson University
 
          YES!  We experienced lines of equal distance apart and found
          that to be a laser alignment problem - not inside the scan
          head but in the laser itself.  We also had problems with
          lines of very erratic widths and brightnesses which appears
          to have gotten better since we put the scanhead and
          computer on separate line conditioners.  We were told that
          it was and electrical problem with the building.  Small
          surge protectors didn't seem to eleviate the problem.
 
          Sue DeMaggio
          Developmental Biology Center
          UC Irvine