Differences between revisions 23 and 24

List of Common Mode Servo Boards

This is a list of Common Mode Servo Boards (JGW-D1503567). Here, several different variants of CMSB are summarized.

Board S/N	Chassis S/N	CMS Board JGW	Assembled Chassis JGW	Use	Version	Additional Changes	Current Place	Confirmed Date	Remarks
	001		S1503859	MZI	Default?	unknown	PSL room
003	002	JGW-S1605803	S1605810	IMC	Default	no changes made in signal path	IOO rack	2018.08.21(Nakano, Enomoto)
004	003	JGW-S1605803	S1605811	CARM (tentative)	CARM ver1		Circuit Room (Mozumi)	2018.08.16 (Enomoto)
005	004	JGW-S1605804	S1605812	PLL X (tentative)	PLL ver1		ALS0 rack	2018.09.28 (Enomoto)
006	005	JGW-S1605805	S1605813	Gr PDH X (tentative)	Gr PDH ver1		LSC0 rack	2018.09.28 (Enomoto)

Block Diagram

CMSB Block Diagram

LIGO-D1002416

List of Variants

Red highlighted part: Exceptional Changes

Default

Common Part

	Common Compensation		Common Boost 1			Common Boost 2			Common Boost 3
pole/zero	40Hz/4kHz		1kHz/20kHz			1kHz/20kHz			300Hz/4.5kHz
Parts	R70:1.2k	C121:33n	R72:1.5k	R77:82	C118:100n	R74:1.5k	R78:82	C119:100n	R76:4.99k	R79:374	C120:100n

Slow Part

	Slow Boost	Slow Compensation	LPF at the last stage
pole/zero	4Hz/400Hz	4Hz pole	100kHz pole --> 500kHz pole in ver2
Parts	C225:330n	C220:330n	C261: 470p --> 100p in ver2

Fast Part

	Fast HPF 1	Fast HPF 2
pole/zero	5Hz High pass	5Hz High pass
Parts	C275:20u	C276:20u

MZI

Common Part

	Common Compensation		Common Boost 1			Common Boost 2			Common Boost 3
pole/zero	40Hz/4kHz		10Hz/400Hz			10Hz/400Hz			1Hz/100Hz
Parts	R70:1.2k	C121:33n	R72:15k	R77:390	C118:1000n	R74:15k	R78:390	C119:1000n	R76:150k	R79:1.5k	C120:1000n

Slow Part

	Slow Boost	Slow Compensation
pole/zero	4Hz/400Hz	4Hz pole
Parts	C225:330n	C220:330n

Fast Part

	Fast HPF 1	Fast HPF 2
pole/zero	5Hz High pass	5Hz High pass
Parts	C275:20u	C276:20u

CARM (ver1)

Common Part

	Common Compensation		Common Boost 1			Common Boost 2			Common Boost 3
pole/zero	40Hz/4kHz		10Hz/1kHz			10Hz/1kHz			300Hz/4.5kHz
Parts	R70:1.2k	C121:33n	R72:15k	R77:165	C118:1000n	R74:15k	R78:165	C119:1000n	R76:4.99k	R79:374	C120:100n

Slow Part

	Slow Boost	Slow Compensation
pole/zero	4Hz/400Hz	4Hz pole
Parts	C225:330n	C220:330n

Fast Part

	Fast HPF 1	Fast HPF 2
pole/zero	5Hz High pass	5Hz High pass
Parts	C275:20u	C276:20u

PLL (ver1)

Common Part

	Common Compensation		Common Boost 1			Common Boost 2			Common Boost 3
pole/zero	40Hz/4kHz		0Hz/10Hz			20Hz/2kHz			20Hz/2kHz
Parts	R70:1.2k	C121:33n	R72:omit	R77:15k	C118:1000n	R74:8.06K	R78:82	C119:1000n	R76:8.06K	R79:82	C120:1000n

Slow Part

	Slow Boost	Slow Compensation	LPF at the last stage
pole/zero	4Hz/400Hz	4Hz pole	100kHz pole --> 500kHz in ver2
Parts	C225:330n	C220:330n	C261: 470p --> 100p in ver2

Fast Part

	Fast HPF 1	Fast HPF 2
pole/zero	5Hz High pass	5Hz High pass
Parts	C275:20u	C276:20u

Gr PDH (ver1)

Common Part

	Common Compensation		Common Boost 1			Common Boost 2			Common Boost 3
pole/zero	40Hz/400Hz		10Hz/1kHz			100Hz/1kHz			300Hz/4.5kHz
Parts	R70:12k	C121:33n	R72:15k	R77:165	C118:1000n	R74:1.5k	R78:165	C119:1000n	R76:4.99k	R79:374	C120:100n

Slow Part

	Slow Boost	Slow Compensation	LPF at the last stage
pole/zero	4Hz/400Hz	4Hz pole	100kHz pole --> 500kHz in ver2
Parts	C225:330n	C220:330n	C261: 470p --> 100p in ver2

Fast Part

	Fast HPF 1	Fast HPF 2
pole/zero	5Hz High pass	5Hz High pass
Parts	C275:20u	C276:20u

Summing Node (ver1)

Common Part

Common Compensation

Common Boost 1

Common Boost 2

Common Boost 3

pole/zero

40Hz/48kHz

10Hz/1kHz

300Hz/4.5kHz

Parts

R68:120k

R70:100

C121:33n

R72:15k

R77:165

C118:1000n

R74:15k

R78:165

C119:1000n

R76:4.99k

R79:374

C120:100n

Slow Part

	Slow Boost	Slow Compensation
pole/zero	4Hz/400Hz	4Hz pole
Parts	C225:330n	C220:330n

Fast Part

	Fast HPF 1	Fast HPF 2
pole/zero	5Hz High pass	5Hz High pass
Parts	C275:20u	C276:20u

Additional Changes

	Common Excitation
pole/zero	Differential Amp
Parts	R82:10k	R91:10k

Summing Node (ver2)

Common Part