Demodulation Boards

• Name	S/N	Rev.	LPF	Splitter	Amplitude Imbalance [dB]	Phase difference [deg]	Notes
  AS11	121			PSCQ-2-51W
  REFL11	021			PSCQ-2-51W
  POY11	119			PSCQ-2-32
  POX11				PSCQ-2-51W
  AS55	029			PSCQ-2-51W
  REFL55	118			PQW-2-90
  POP55				-
  POP22	020			PSCQ-2-32
  POP110	120			PSCQ-2-120

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Board Arrangement on 1Y2 Rack

== Diagram needs to be updated ! =

• The latest version is available on the 40m svn:

• [https://nodus.ligo.caltech.edu:30889/svn/trunk/suresh/40m_RF_upgrade/1Y2%20Rack%20Layout.pdf] attachment:1Y2_demod.png

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2-Step Upgrading

We are currently at the intermediate state

• attachment:upgrade_demod.png