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--[[User:Zjsimmons|Zjsimmons]] ([[User talk:Zjsimmons|talk]]) 19:07, 4 December 2014 (CST)
Have not been able to get the slow feedback working. Hmm.. Tried a variety of things:
-Scrutinized the switching
-Tried locking with slow feedback by itself inverted, didn't see any evidence of locking.
-I know the LM399s seem to be mysterious noise generators. Tried putting some caps across their heaters, as i've seen this in some circuit drawings, didn't seem to help with error signal issue, not sure if it helped with rail noise.
Perhpas:
-circuit power supply could be better?
-try inverting slow branch
-too much/little gain - change cap and resistor values in fb branch
-bad component? but the ramp works fine, most all of that is working
-some strange coupling? it is weird we can see discontinuities on the error signal that correspond to the square pulse, do we see those in the other lock box?
--[[User:Zjsimmons|Zjsimmons]] ([[User talk:Zjsimmons|talk]]) 19:36, 3 December 2014 (CST)
Made a little bit of headway today with the PDH.
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