## page was renamed from Upgrade 09/GreenLock/November 2010
= goals in this month =

 . '''''  - Do something by using green beat note'''''

 . '''''  - Prepare digital systems '''''

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= to do list =

||{{attachment:green.png}} '''complete'''|| {{attachment:orange.png}} '''intermediate state ''' || {{attachment:red.png}} '''nothing happened''' || {{attachment:black.png}} gave up||

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 . ''' in-vac work '''
   . {{attachment:green.png}} final alignment
   . {{attachment:green.png}} fix a clipped beam   

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 . ''' optics '''
   . {{attachment:green.png}} check the fiber
   . {{attachment:green.png}} preparation for the 1064nm beat note
   . {{attachment:orange.png}} find out the cause of a 20dB missing factor in the beat note detection

<<BR>> 
 . ''' work on some electronics '''
   . {{attachment:green.png}} noise characterization of the RFPD
   . {{attachment:green.png}} VCO check
   . {{attachment:orange.png}} noise characterization of the VCO
   . {{attachment:red.png}} preparation for power line for the PFPDs and VCOs



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 . ''' digital system'''
   . {{attachment:green.png}} prepare the front end machine {{{ c1iscex }}}
   . {{attachment:green.png}} run the realtime code on a Gentoo
   . {{attachment:green.png}} RFM
   . {{attachment:green.png}} recheck the ADCs
   . {{attachment:green.png}} digitally slow feedback to the laser temperature

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 . ''' misc. '''
    . {{attachment:green.png}} power budget 
    . {{attachment:orange.png}} re-check the mode matching of the beam going to the cavity
    . {{attachment:orange.png}} renew some old diagrams

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= considerations =

== How to add an offset to the PLL ==
 . ''' How to do it ? '''
   . How many channels ?


 . ''' What kind of digital control do we need ? '''
   . Using epics slow channels ?
   . Using a realtime control ?

 . ''' What kind of analog circuit do we need ? '''
   . Anti Aliasing ?
   . Dewhitening ?

== Noise requirements for pre-arm stabilization ==
 . ''' what is the actuation coefficient ''' of the ETM OSEMs

 . ''' Noise budget '''