This page describes the system requirements before we can install the
DC readout and OMC.
----------------------

 1.  Vacuum compatible shutter -   (Uniblitz?  Tip/Tilt fast shutter?  JPL chen/hochberg/moore
       fast shutter?)

 1.  REFL port pick off?

 1.  Beam block for OMC DC diode reflection

 1.  In-vacuum connectorization of tip/tilt pigtails, OMC L PZT, and OMMT picomotor
     *   Maybe 9pin D's per axis for the tip/tilts. 

 1.  A complete parts list of all in-vacuum parts,  including cabling
    a.  OMC,  OMMT, tip/tilt,  and pickoff parts list:  [[OMCparts]]
    a.  In vacuum cabling:  [[cables]]

 1. The baked out hardware.

 1.  OMC PZT driver
    a.  Minimum:  Thorlabs PZT driver plus SRS 830
    a.  Maximum:  LIGO PZT driver plus digital mod/demod and servo

 1.  Alignment PZT drivers
    a. tip/tilt for 2 mirrors - 4 DOF
    a.  Minimum:  DC complementary control of 0-150 V for 4 DOF
                   (8 voltages, 2 per DOF)
    a.  Maximum:  LIGO PZT driver plus digital mod/demod,  
                  input/output matrices and servo filters

 1.  CDS hardware
    a.  Minimum:  interface from vacuum flanges and satellite box to BNC
    a.  Maximum:  dual CPU PCI computer with:
                  i.    local frame builder
                  i.   bridge to 40m frame builder for selected channels
                  i.  ADC, DAC, and reflective memory boards
                  i.   wiring from ADC/DAC to cross connects
                  i.    wiring from cross connects to PZT and 
                        photodiode hardware
                  i.   length and angle servo software