Summary of Demodulation Boards

• Name	S/N	Rev.	LPF	Splitter	Amp. Imbalance [dB]	Phase difference [deg]	Notes
  AS11	121		SCLF-10.7	PSCQ-2-51W			w/ amp board
  REFL11	021		SCLF-10.7	PSCQ-2-51W
  POY11	119		SCLF-10.7	PSCQ-2-32
  POX11			SCLF-10.7	PSCQ-2-51W
  POP11			SCLF-10.7
  POP22	020		SCLF-21.4	PSCQ-2-32
  REFL33			SCLF-33+
  AS55	029		SCLF-65	PSCQ-2-51W
  REFL55	118		SCLF-65	PQW-2-90
  POP55			SCLF-65+	-			w/ amp board
  POP110	120		SCLF-135	PSCQ-2-120
  REFL165			SCLF-190
  AS165			SCLF-190
  POP165			SCLF-190

References

• [1] Ordering Low pass filters 40m elog #4459

• [2] Low pass filters and the old name convention 40m elog #4511

• [3] Power splitter Upgrade 40m elog #4538

• [4] How to replace the splitter 40m elog #4554

• [5] Replacement of the splitters 40m elog #4698

• [6] Replacement of the splitters part II 40m elog #4714

• [7] I/Q imbalance tests 40m elog #4736

• [8] 1Y2 rack pictures Electronics/1Y2

• [9] Circuit schematic LIGO D990511-x0

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

  

Upgrading of Demodulation Boards

We are currently at the intermediate state

Links

• Whitening filters for the LSC demod signals