[Doug, Suresh]

   We replaced the diode laser unit in HAM2 oplev yesterday ( Sl no 197 replace by Sl no 122-1 ) and observed it for the last 24 hours. It required several power adjustments before it reached glitch free operation.   However the power is still dropping and has not stabilised.  The laser may require the power to be reset to around 50000 counts if it drifts into a unstable region.

The power trend and spectrogram showing glitch free operation are attached.  As the unit 122-1 puts out much greater power than the 197 we had to readjust the analog gain.  The new switch state is also attached.