Quick update, more detailed update to follow.

• Laser is working
• Photodiode sweep with the Keithley shows a sensible dark Current v Voltage plot (when laser is off) - indicating that PD wiring is still intact
• Laser was aligned onto photodiode (although it took a while aligning to find the signal)
• Ran a sweep with the Keithley and the laser on - saw another sensible bright Current v Voltage plot (more current than in the dark case)
• DAQ control still works
• DAC output is directly providing (unfiltered) 200mV bias

Still to do:

• Get the SR785 plugged back in
• Get an SR560 inserted between DAC output and PD bias to low pass filter
• Investigate why the laser current set point is so noisy
• Sort out RTD situation inside the chamber
• Miscellaneous stuff