= Analog Electronics for Interferometer Control =
== Upcoming Request for AEL ==
Quantities (without spare) for chassis (not boards) we have to additionally make by the specified time are shown. Request from IOO+MIF(+IMC suspension?).
||Name ||by 2016.10 <<BR>>(for IMC WFS) ||by 2017.2 <<BR>>(for green PLL, ISS) ||by 2017.5 <<BR>>(for PRMI initial alignment) ||by 2017.7 <<BR>>(for PRMI LSC/ASC) ||by full bKAGRA ||Produced ||
||High Power Coil Driver || || || || ||3? (only for IMC included) ||? ||
||Quad IQ Demodulator LSC || || || || ||7 ||5 ||
||Quad IQ Demodulator ASC ||+2 || || ||+4 ||22 ||0 ||
||RF Distribution Amplifier ||+1 || || ||+2 ||10 ||1(handmade) ||
||Common Mode Servo Board || || || ||+1 ||4 ||0 ||
||Frequency Doubler || || || ||+1 ||2 ||0 ||
||ISS Board || ||+1? || || ||1 ||0 ||
||Phase Frequency Discreminator || ||+1? || || ||1 ||0 ||
||VCO with PLL || ||+2? || || ||2 ||0 ||


== Low noise VCOs ==
[[/LowNoiseVCOs]]


== Electronics ==
Red rows: To be designed (or selected). Yellow rows: Not yet purchased, short of stock, or in production. Green rows: Ready for bKAGRA Phase 1. White rows: Ready for bKAGRA. Pink rows: taken cared by ToyamaU

Last update: Sept 11, 2017 (Added electronics for RF AM, updated status)
||Name ||Height ||Schematics ||Power ||Description ||Needed<<BR>>(bKAGRA Phase 1) ||Needed<<BR>>(bKAGRA) ||Produced ||Status ||
||||||||||||||||||<style="text-align:center">for PSL ||
||<#66ff00>RF Oscillator Source ||2U ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6762|JGW-T1706762]], [[https://www.keysight.com/ja/pdx-x201911-pn-N5181B/mxg-x-series-rf-analog-signal-generator-9-khz-to-6-ghz?cc=JP&lc=jpn|Agilent N5181B]] ||AC ||for the time being (for auxiliary modulations like fPMC, fIMC, fALS, we should use cheaper fixed oscillator) ||5 ||7 ||6 ||Stored in ICRR, Hongo, and Toyama ||
||RF PD ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1280|JGW-D1201280]] ||+-18V ||has RF HI, RF LOW outputs(BNC), and DC output(Dsub 9pin, which includes +-18V) ||6 ||18 ||3+20+20 ||3 handmaking done; 40 arrived with diodes(20 for MIF, 20 without resonances); [[KAGRA/Subgroups/MIF/AEL/Photodetectors/RFPDList|List]] ||
||DC PD ||- ||[[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA100A|Thorlabs PDA100A]] ||+-12V ||has DC output(BNC), needs power cable [[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA-C-72|PDA-C-72]] ||7 ||9 ||6+5 ||At Kamioka Branch ||
||TTFSS ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1823|JGW-D1301823]] ||from Interface || ||1 ||1 ||1 ||At the site ||
||TTFSS Interface ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1831|JGW-D1301831]] ||+-17V,+-24V,+-200V || ||1 ||1 ||1 ||At the site ||
||AOM Driver ||- ||Crystal Technology 1110AF-AEFO-1.5 ||+28V || ||1 ||1 ||1 ||At the site, for reference cavity ||
||PZT Driver ||- ||? ||AC ||for periscope PZTs, 2ch ||1 ||1 ||1 ||At the site?? ||
||PMC Servo Board ||- ||([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1823|JGW-D1301823]]) ||from Interface || ||1 ||1 ||1 ||At the site (basically copy of TTFSS) ||
||PMC Servo Board Interface ||- ||([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1831|JGW-D1301831]]) ||+-17V,+-24V,+-200V || ||1 ||1 ||1 ||At the site (basically copy of TTFSS Interface) ||
||||||||||||||||||<style="text-align:center">for IMC LSC ||
||<#66ff00>Quad IQ Demodulator LSC ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2412|JGW-D1402412]] ||+-18V ||4 LOs for 4 demodulation channels ||1 ||7 ||5 ||At Kamioka Branch, additional requested to AEL ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5487|JGW-T1605487]]) ||
||<#ffff00>Dual IQ Demodulator ||1U ||([[https://dcc.ligo.org/LIGO-E1100044/public|LIGO-E1100044]]) ||+-18V ||2 LOs for 2 demodulation channels, fast verison ||3 ||3 || ||use QuadIQ for now ||
||Common Mode Servo Board ||2U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3705|JGW-D1503705]] ||+-17V,+-24V ||2 inputs, slow and fast outputs ||2 ||4 ||5 ||At Kamioka Branch [[KAGRA/Subgroups/MIF/AEL/CMSB|List]]||
||RF PD Interface Board ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3818|JGW-D1503818]] ||+-18V ||for ribbon cables from 4 RF PDs, with whitening filter ||3 ||6 ||10 ||At Kamioka Branch ||
||||||||||||||||||<style="text-align:center">for IMC ASC, better PSL ||
||RF QPD ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3812|JGW-D1403812]],[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3813|JGW-D1403813]] ||+-18V ||should have 4 RF outputs, 4 DC outputs ||8 ||14 ||5+15 ||5 for IMC, 15 for IFO at Kamioka Branch; [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/MIF/AEL/Photodetectors/RFQPDList|List]] ||
||RF QPD Interface Board ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3814|JGW-D1503814]] ||+- 18V ||for ribbon cables from 4 RF QPDs, without whitening filter ||3 ||4 ||5 ||At Kamioka Branch ||
||DC QPD ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2411|JGW-D1402411]] ||+-15V ||has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being ||10 ||12 ||40 ||(including ones for oplevs, ones for green) ||
||DC QPD Interface Board ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2087|JGW-D1302087]] ||+-18V ||for ribbon cables from 2 DC QPDs, with whitening filter ||5 ||8 ||20 ||At Kamioka Branch (including ones for oplevs) ||
||<#ffff00>Quad IQ Demodulator ASC ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2412|JGW-D1402412]] ||+-18V ||1 LO for 4 demodulation channels ||8 ||22 ||0 ||Requested to AEL ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5488|JGW-T1605488]]) ||
||<#ffff00>RF Distribution Amplifier ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4460|JGW-D1504460]] ||+-24V ||split into 8 ||4 ||10 ||1 ||Requested to AEL ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5490|JGW-T1605490]]) ||
||<#ff0000>Delay Line Phase Shifter ||1U ||([[https://dcc.ligo.org/LIGO-D0900128/public|LIGO-D0900128]]) ||+15V? ||for 2 channels ||3 ||3 || || ||
||<#ff0000>DC PD Interface Board ||- ||([[https://dcc.ligo.org/LIGO-D1002932|LIGO-D1002932]]) ||+-12V ||for 4 DC PDs, without whitening filter, on output tables ||5 ||6 || || ||
||||||||||||||||||<style="text-align:center">for DRFPMI ||
||<#ffff00>Frequency Doubler ||1U ||([[https://dcc.ligo.org/LIGO-D1002178/public|LIGO-D1002178]]) ||+-17V,+-24V ||for sideband power monitor ||1 ||2 || ||Requested to AEL ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5492|JGW-T1605492]]) ||
||<#ff0000>Difference Frequency Generator ||1U? || || ||for nonresonant sidebands, 2 channels ||0 ||1 || || ||
||||||||||||||||||<style="text-align:center">for ALS ||
||<#ff0000>RF PD for green ||- ||([[https://dcc.ligo.org/LIGO-D1002969/public|LIGO-D1002969]]) || ||use IR circuit but change PD? ||2? ||2 || || ||
||<#ff0000>BB PD for IR ||- ||([[https://dcc.ligo.org/LIGO-D1002969/public|LIGO-D1002969]]) || ||for ALS PLL (we use IR beat for KAGRA, while aLIGO uses green beat) ||2? ||2 || || ||
||<#ff0000>BB PD Interface Board ||1U? ||([[https://dcc.ligo.org/LIGO-D1102079/public|LIGO-D1102079]]) || ||same for RF PD Interface? ||1? ||1 || || ||
||<#ff0000>DC PD for green ||- ||[[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA100A|Thorlabs PDA100A]] ||+-12V ||has DC output, needs power cable [[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA-C-72|PDA-C-72]] ||2? ||2 || || ||
||DC QPD for green ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2411|JGW-D1402411]] ||+-15V ||has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being ||4? ||4 ||40 ||(including ones for oplevs, ones for IR) ||
||<#ff00ff>Phase Frequency Discriminator ||1U ||([[https://dcc.ligo.org/LIGO-D1002476/public|LIGO-D1002476]]) ||+-17V,+-24V ||for ALS, 2 channels ||2? ||1 || ||Made by ToyamaU? ||
||<#ff00ff>VCO with PLL ||2U ||([[https://dcc.ligo.org/LIGO-D0900605/public|LIGO-D0900605]],[[https://dcc.ligo.org/LIGO-D1300812/public|LIGO-D1300812]]) ||+-17V,+-24V ||for PLL VCO, we will use [[https://www.keysight.com/ja/pdx-x201773-pn-E8663D/psg-rf-analog-signal-generator-100-khz-to-9-ghz?cc=JP&lc=jpn|E8663D]] ||2? ||2 || ||Made by ToyamaU? ||
||||||||||||||||||<style="text-align:center">for better sensitivity ||
||<#ff0000>DC PD in vacuum ||- ||([[https://dcc.ligo.org/LIGO-D1101059|LIGO-D1101059]]) || ||for ISS and OMCTVAC ||0 ||3 || || ||
||<#ff0000>DC QPD in vacuum ||- ||([[https://dcc.ligo.org/LIGO-T0900423/public|LIGO-T0900423]]); also see [[https://dcc.ligo.org/public/0070/G1100950/001/QPD_test_status.pdf|this]] for the explanation of the 5th diode. || ||bare QPD without amplifier ||0 ||10 || || ||
||<#ff0000>DC QPD in vacuum for green ||- ||([[https://dcc.ligo.org/LIGO-T0900423/public|LIGO-T0900423]]) || ||bare QPD without amplifier ||0 ||4 || || ||
||<#ff0000>DC PD Amplifier ||? || ||+-18V ||for DC PD in vacuum ||0 ||2 || || ||
||<#ff0000>DC QPD Amplifier ||1U ||([[https://dcc.ligo.org/LIGO-D1002481/public|LIGO-D1002481]]) ||+-18V ||for ribbon cables from 2 DC QPDs in vacuum ||0 ||7 || || ||
||<#ff00ff>ISS Board ||? ||([[https://dcc.ligo.org/LIGO-D1001985|LIGO-D1001985]], [[https://dcc.ligo.org/LIGO-D1300439|LIGO-D1300439]]) || || ||1? ||1 || ||Made by ToyamaU? ||
||<#ff0000>OMC Servo Board ||? || || || ||0 ||1 || || ||
||<#ff0000>RF Oscillator Source(Wenzel OCXO) ||2U ||([[https://dcc.ligo.org/LIGO-D080702/public|LIGO-D080702]]) || || ||0 ||7 || || ||
||<#ff0000>EOM/AOM Driver ||? ||([[https://dcc.ligo.org/LIGO-E1400445/public|LIGO-E1400445]]) || ||for RF AM stabilization, modulation amplitude adjustment ||0 ||3 || || ||




 * References: [[https://awiki.ligo-wa.caltech.edu/aLIGO/RfDesign|awiki/RfDesign]], [[https://awiki.ligo-wa.caltech.edu/aLIGO/LSC_Photodetectors|awiki/LSC_Photodetectors]], [[https://dcc.ligo.org/LIGO-D1200666|Cabling LIGO-D1200666]]

=== TO DO ===
 * Details of ISS, ALS, OMC servo are uncertain at this point

== Photodetector list ==
 * [[KAGRA/Subgroups/MIF/AEL/Photodetectors|Photodetectors]]
 * (Original) List of the Interferometer Detection Ports [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2982|JGW-T1402982]]

== Cable list ==
 * List of the ISC cables is available at [[https://docs.google.com/spreadsheets/d/1VPkv64gDrbhSX4LiO5aNc-miSf3h3pl1dRQPKUhnuCs/|this Google Spreadsheet]].

== System diagram ==
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8394 | JGW-D1808394]]
 * As-built rack diagram maintained by GDS group [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9427 | JGW-D1809427]]

== For each rack ==
 * KAGRA ISC Electrical Components Layout [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2986|JGW-D1402986]]
 * Position of digital system racks [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=425|JGW-D1100425]]
 * What's inside the digital system racks [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2831|JGW-D1402831]]
 * Also see the followings for the latest design:
  * IOO rack: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6814| JGW-D1706814]]
  * IMC rack: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7021| JGW-D1707021]]
  * ALS0 and 1 racks: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8696| JGW-D1808696]]
  * LSC rack: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9052| JGW-D1809052]]
  * OMC0 and 1 racks: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9823| JGW-D1909823]] [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9844| JGW-D1909844]]
  * TMSX rack: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9074| JGW-D1809074 ]]
  * TMSY rack: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10293| JGW-G1910293 ]]


=== PSL ===
See [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2984|JGW-D1402984]] for cabling.
||Name ||Height ||Description ||to ADC ||from DAC ||bKAGRAp1? ||
||RF Oscillator Source ||2U ||for fPMC sideband || || ||yes ||
||(RF splitter) ||- ||split fPMC into 2 for PSL EOM, PMCR LO || || ||yes ||
||PMC Servo Board ||- ||for PMC servo, receives PMCR, needs fPMC LO || || ||yes ||
||PMC Servo Board Interface ||- ||for PMC　Servo Board || || ||yes ||
||TTFSS ||- ||for Refcav servo, receives REFCAVR, needs fIMC LO from IO rack || || ||yes ||
||TTFSS Interface ||- ||for TTFSS ||?? ||?? ||yes ||
||DC PD Interface Board ||- ||for PMCT, REFCAVT, RFAMR, RFAMT || || ||yes ||
||PZT Driver ||- ||for periscope PZTs || ||BNCx2 ||yes ||




=== Output Tables ===
Interface boxes for Thorlabs DC PDs are located at the respective output tables.
||Name ||Height ||Description ||Location ||to ADC ||from DAC ||bKAGRAp1? ||
||DC PD Interface Board ||- ||for IMCT, (3ch left) ||IMC TRANS table -> IO rack ||Dsubx1(no whitening) || ||yes ||
||DC PD Interface Board ||- ||for IMMT1T, (3ch left) ||IMMT1T pylon -> MMT rack ||Dsubx1(no whitening) || ||yes ||
||DC PD Interface Board ||- ||for TRX, TRX_GR, (2ch left) ||TRX table -> EX4 rack ||Dsubx1(no whitening) || ||yes ||
||DC PD Interface Board ||- ||for TRY, TRY_GR, (2ch left) ||TRY table -> EY4 rack ||Dsubx1(no whitening) || ||yes ||
||DC PD Interface Board ||- ||for OMCT, (3ch left) ||AS table -> AS rack? ||Dsubx1(no whitening) || || ||




=== IO racks ===
Located between PSL and MCF chamber. Generates RF for fIMC, f1, f2, f3, 2*f1, 2*f2, f3-f1, f3-f2, fALSX, and fALSY. Has servo circuits for FRC, IMC, and ISS. Takes care of PD/QPDs on PSL, IMC REFL, and IMC TRANS tables. Also takes care of equivalent PD/QPDs in vacuum.
||Name ||Height ||Description ||to ADC ||from DAC ||bKAGRAp1? ||
||||||||||||<style="text-align:center">PD/QPD ||
||Dual IQ Demodulator ||1U ||for IMCR(fIMC), RFAMDLINE(fIMC) ||Dsubx1(no whitening) || ||yes ||
||RF PD Interface Board ||1U ||for PMCR, REFCAVR, IMCR, (1ch left) ||Dsubx1(no whitening) || ||yes ||
||RF QPD Interface Board ||1U ||for IMCR_A/B, (2ch left) ||Dsubx2(no whitening) || ||yes ||
||DC QPD Interface Board ||1U ||for IP_A/B ||Dsubx2(whitened) || ||yes ||
||DC QPD Interface Board ||1U ||for IMCT_A/B ||Dsubx2(whitened) || ||yes ||
||DC QPD Amplifier ||1U ||for IMCTVAC_A/B ||Dsubx2(whitening) || || ||
||||||||||||<style="text-align:center">fIMC ||
||RF Oscillator Source ||2U ||for fIMC sideband (also for Refcav) || || ||yes ||
||RF Distribution Amplifier ||1U ||for fIMC. to PSL EOM, to Delay Line for Refcav, to Delay Line for IMC LSC, to IQ Demod ASC x 2, (3ch left) || || ||yes (by 2016.10) ||
||Delay Line Phase Shifter ||1U ||for TTFSS LO(Refcav lock), IMCR LO(IMC LSC) || || ||yes ||
||Common Mode Servo Board ||2U ||for IMC servo ||Dsubx3(no whitening) ||Dsubx1 ||yes ||
||Quad IQ Demodulator ASC ||1U ||for IMCR_A QPD(fIMC) ||Dsubx2(whitening) || ||yes (by 2016.10) ||
||Quad IQ Demodulator ASC ||1U ||for IMCR_B QPD(fIMC) ||Dsubx2(whitening) || ||yes (by 2016.10) ||
||||||||||||<style="text-align:center">f1 ||
||RF Oscillator Source ||2U ||for f1 sideband || || ||yes ||
||RF Distribution Amplifier ||1U ||for f1. to PSL EOM, to PSL EOAM, to MMT rack, to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, (2ch left) || || ||yes ||
||Frequency Doubler ||1U ||f1 to 2*f1 for ISC racks || || ||yes (by 2017.7) ||
||||||||||||<style="text-align:center">f2 ||
||RF Oscillator Source ||2U ||for f2 sideband || || || ||
||RF Distribution Amplifier ||1U ||for f2. to PSL EOM, to MMT rack to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, (3ch left) || || || ||
||Frequency Doubler ||1U ||f1 to 2*f1 for ISC racks || || || ||
||||||||||||<style="text-align:center">f3 ||
||RF Oscillator Source ||2U ||for f3 to splitter || || || ||
||(RF splitter) ||- ||split f3 into 2 for Diff. Freq. Generator || || || ||
||Diff. Freq. Generator ||1U? ||make f3-f1 for ISC racks, make f3-f2 for ISC racks || || || ||
||||||||||<style="text-align:center">fALSX,fALSY ||
||RF Oscillator Source ||2U ||for fALSX sideband for ISC racks || || ||(by 2017.2) ||
||RF Oscillator Source ||2U ||for fALSY sideband for ISC racks || || ||(by 2017.2) ||
||||||||||||<style="text-align:center">Others ||
||ISS Board ||?? || ||?? ||?? ||(by 2017.2) ||




=== MMT rack ===
Located near PRM chamber. Takes care of PD/QPDs on IMMT1 and IMMT2 tables. Also takes care of equivalent PD/QPDs in vacuum.
||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? ||
||||||||||||<style="text-align:center">PD/QPD ||
||Quad IQ Demodulator LSC ||1U ||for IMMT2T(f1), IMMT2T(f2), (2ch left) ||Dsubx1(whitening) || || ||
||RF PD Interface Board ||1U ||for IMMT2T, (3ch left) ||Dsubx1(no whitening) || ||yes ||
||DC PD Amplifier ||1U ||for IMMT1TVAC, IMMT2TVAC, (2ch left) ||Dsubx1(whitening) || || ||
||DC QPD Interface Board ||1U ||for IMMT2T_A/B ||Dsubx2(whitened) || ||yes ||
||DC QPD Amplifier ||1U ||for IMMT2TVAC_A/B ||Dsubx2(whitening) || || ||




=== ISC racks ===
Stands for LSC, ASC1, ASC2 and AUX racks located between PR3 and PR2 chambers. Has servo circuits for CARM, ALSX, and ALSY. Takes care of PD/QPDs on REFL, POP, POS, POX, POY, and AS tables. Also takes care of equivalent PD/QPDs in vacuum.
||Name ||Height ||Description ||to ADC ||from DAC ||bKAGRAp1? ||
||||||||||||<style="text-align:center">PD/QPD ||
||Dual IQ Demodulator ||1U ||for REFL(f1), REFL(f2) ||Dsubx1(no whitening) || ||yes ||
||Dual IQ Demodulator ||1U ||for POP_GR(fALSY), POS_GR(fALSX) ||Dsubx1(no whitening) || ||(by 2017.2) ||
||Quad IQ Demodulator LSC ||1U ||for REFLNRSB(f3-f1), REFLNRSB(f3-f2), AS(f1), ASVAC(f1) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator LSC ||1U ||for POP(f1), POP(f2), SPOP(2*f1), SPOP(2*f2) ||Dsubx2(whitening) || ||yes ||
||Quad IQ Demodulator LSC ||1U ||for SPOS(2*f1), SPOS(2*f2), (2ch left) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator LSC ||1U ||for POX(f1), POX(f2), POY(f1), POY(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator LSC ||1U ||for REFLVAC(f1), REFLVAC(f2), POPVAC(f1), POPVAC(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator LSC ||1U ||for POXVAC(f1), POXVAC(f2), POYVAC(f1), POYVAC(f2) ||Dsubx2(whitening) || || ||
||RF PD Interface Board ||1U ||for REFL, REFLNRSB, AS, SPOS ||Dsubx1(no whitening) || ||yes ||
||RF PD Interface Board ||1U ||for POX, POY, POP, SPOP ||Dsubx1(no whitening) || || ||
||RF PD Interface Board ||1U ||for POP_GR, POS_GR, POXVAC, POYVAC ||Dsubx1(no whitening) || || ||
||RF PD Interface Board ||1U ||for REFLVAC, POPVAC, ASVAC, (1ch left) ||Dsubx1(no whitening) || || ||
||BB PD Interface Board ||1U ||for PLLX, PLLY, (2ch left?) ||Dsubx1(no whitening) || || ||
||RF QPD Interface Board ||1U ||for REFL_A/B, POP_A/B ||Dsubx4(no whitening) || ||yes ||
||RF QPD Interface Board ||1U ||for AS_A/B, ASVAC_A/B ||Dsubx4(no whitening) || ||yes ||
||RF QPD Interface Board ||1U ||for REFLVAC_A/B, POPVAC_A/B ||Dsubx4(no whitening) || || ||
||||||||||||<style="text-align:center">f1 ||
||RF Distribution Amplifier ||1U ||for f1. to Delay Line for CARM, POP LO, POX LO, POY LO, AS LO, REFLVAC LO, ASVAC LO, to RF Dist. || || ||yes (by 2017.7) ||
||RF Distribution Amplifier ||1U ||for f1. to POPVAC LO, POXVAC LO, POYVAC LO, IQ Demod ASC x 3, to RF Dist. || || || ||
||RF Distribution Amplifier ||1U ||for f1. IQ Demod ASC x 7, to RF Dist. || || ||yes (by 2017.7) ||
||RF Distribution Amplifier ||1U ||for f1. IQ Demod ASC x 2, (6ch left) || || || ||
||Delay Line Phase Shifter ||1U ||for REFL LO(f1, CARM), REFL LO(f2, CARM) || || ||yes ||
||Common Mode Servo Board ||2U ||for CARM servo ||Dsubx3(no whitening) ||Dsubx1 ||yes ||
||Quad IQ Demodulator ASC ||1U ||for REFL_A QPD(f1) ||Dsubx2(whitening) || ||yes (by 2017.7) ||
||Quad IQ Demodulator ASC ||1U ||for REFL_B QPD(f1) ||Dsubx2(whitening) || ||yes (by 2017.7) ||
||Quad IQ Demodulator ASC ||1U ||for POP_A QPD(f1) ||Dsubx2(whitening) || ||yes (by 2017.7) ||
||Quad IQ Demodulator ASC ||1U ||for POP_B QPD(f1) ||Dsubx2(whitening) || ||yes (by 2017.7) ||
||Quad IQ Demodulator ASC ||1U ||for AS_A QPD(f1) ||Dsubx2(whitening) || ||yes (by 2017.7) ||
||Quad IQ Demodulator ASC ||1U ||for AS_B QPD(f1) ||Dsubx2(whitening) || ||yes (by 2017.7) ||
||Quad IQ Demodulator ASC ||1U ||for REFLVAC_A QPD(f1) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for REFLVAC_B QPD(f1) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for POPVAC_A QPD(f1) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for POPVAC_B QPD(f1) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for ASVAC_A QPD(f1) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for ASVAC_B QPD(f1) ||Dsubx2(whitening) || || ||
||||||||||||<style="text-align:center">f2 ||
||RF Distribution Amplifier ||1U ||for f2. to Delay Line for CARM, POP LO, POX LO, POY LO, REFLVAC LO, POPVAC LO, POXVAC LO, RF Dist. || || || ||
||RF Distribution Amplifier ||1U ||for f2. to POYVAC LO, RF Dist., (6ch left) || || || ||
||RF Distribution Amplifier ||1U ||for f2. IQ Demod ASC x 8 || || || ||
||Quad IQ Demodulator ASC ||1U ||for REFL_A QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for REFL_B QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for POP_A QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for POP_B QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for REFLVAC_A QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for REFLVAC_B QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for POPVAC_A QPD(f2) ||Dsubx2(whitening) || || ||
||Quad IQ Demodulator ASC ||1U ||for POPVAC_B QPD(f2) ||Dsubx2(whitening) || || ||
||||||||||<style="text-align:center">2*f1,2*f2 ||
||(RF splitter) ||- ||split 2*f1 into 2 for SPOP LO, SPOS LO || || || ||
||(RF splitter) ||- ||split 2*f2 into 2 for SPOP LO, SPOS LO || || || ||
||||||||||||<style="text-align:center">f3-f1,f3-f2 ||
||||||||||||<style="text-align:center"> ||
||||||||||||<style="text-align:center">fALSX,fALSY ||
||(RF splitter) ||- ||split fALSX into 2 for POP EOM, Delay Line for ALSX || || ||(by 2017.2) ||
||Delay Line Phase Shifter ||1U ||for POP_GR LO(ALSX), POS_GR LO(ALSY) || || ||(by 2017.2) ||
||Common Mode Servo Board ||2U ||for ALSX servo ||Dsubx3(no whitening) ||Dsubx1 || ||
||(RF splitter) ||- ||split fALSY into 2 for POS EOM, Delay Line for ALSY || || || ||
||Common Mode Servo Board ||2U ||for ALSY servo ||Dsubx3(no whitening) ||Dsubx1 || ||
||Phase Frequency Discriminator ||1U ||for ALSX, ALSY ||?? ||?? ||(by 2017.2) ||
||VCO with PLL ||2U ||for ALSX ||?? ||?? ||(by 2017.2) ||
||VCO with PLL ||2U ||for ALSY ||?? ||?? ||(by 2017.2) ||




=== EX4 rack ===
Located close to EXC chamber. Takes care of PD/QPDs on TRX table. Also takes care of equivalent PD/QPDs in vacuum.
||Name ||Height ||Description ||to ADC ||from DAC ||bKAGRAp1? ||
||||||||||||<style="text-align:center">PD/QPD ||
||DC QPD Interface Board ||1U ||for TRX_A/B ||Dsubx2(whitened) || ||yes ||
||DC QPD Interface Board ||1U ||for TRX_GR_A/B ||Dsubx2(whitened) || ||yes ||
||DC QPD Amplifier ||1U ||for TRXVAC_A/B ||Dsubx2(whitening) || || ||
||DC QPD Amplifier ||1U ||for TRXVAC_GR_A/B ||Dsubx2(whitening) || || ||




=== EY4 rack ===
Located close to EYC chamber. Components should be the same as those in EX4.

=== AS rack ===
Should be located close to OMM chamber. Takes care of PD/QPDs for OMC servo.
||Name ||Height ||Description ||to ADC ||from DAC ||bKAGRAp1? ||
||||||||||||<style="text-align:center">PD/QPD ||
||DC PD Amplifier ||- ||for OMCTVAC, (3ch left) ||Dsubx1(whitening) || || ||
||DC QPD Interface Board ||1U ||for OMCT_A/B ||Dsubx2(whitened) || || ||
||DC QPD Amplifier ||1U ||for OMCTVAC_A/B ||Dsubx2(whitening) || || ||
||||||||||||<style="text-align:center">Others ||
||OMC Servo board ||?? ||for OMC lock ||?? ||?? || ||




----
== Plan (as of 2012-08) ==
 * Test fabrication of RF PD (by the end of September ?, test in October)
 * Compile other analog circuit designs from LIGO into KAGRA spec. (by the end of October)
 * Design frequency stabilization related circuits with NAOJ group (by the end of FY2012)

[[KAGRA/Subgroups/MIF/AEL/RFPD|RFPD]]