LIGO Document E1201036-x0

DCN for schematic changes to aLIGO HAM Auxilary and Tip/Tilt SUS Coil Driver

Document #:
Document type:
E - Engineering documents
A change to a schematic from revision v2 to v3
Files in Document:
Notes and Changes:
The existing aLIGO boards are manufactured using v2 PCB's. Revison v3 includes a change in value of the series resistors R11 and R33 from 100 Ohms to 1.2K Ohm.

The 100 Ohm resistor provide an actuation range factor of 10 larger than which can be observed by the OSEMs. It can contribute to the noise.

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