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--[[User:Zjsimmons|Zjsimmons]] ([[User talk:Zjsimmons|talk]]) 13:33, 19 January 2015 (CST)
Came in on Saturday and built a new lock-box circuit with the new board. Just re-hooked it up and it seemed to work! First time i've seen locking via PDH.
Couple of circuit issues to fix:
-need to move the switch that grounds the ramp BEFORE the input resistor to that op-amp
-jumpers that i though would be clever are really unnecessary/wrong, a bnc short at the input does the job.
--[[User:Zjsimmons|Zjsimmons]] ([[User talk:Zjsimmons|talk]]) 11:59, 15 January 2015 (CST)
So it appears that the mirror reflectivity for the invar cavities is so high it is making them hard to work with. Ordered a broadband (lower reflectivity) mirror from thorlabs, we'll see if that helps.
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