Multi-Channel Electronics (MCE) 

Introduction

• Functional Description of the Multi-Channel Electronics  [PDF]  (Sep. 27, 2003)
• MCE Getting Started Manual  [PDF]  (SC2_ELE_S580_520) 
• MCE Interface (SCUBA-2) [PDF]  (SC2_ELE_S580_005) (Jun 27, 2006)
• MCE-Cryostat Diagram - cartoons of squid chain setup, servo loop calculations, and word-sizes   [PDF]  
• Output Drive Calculations  [xls]  
• MCE Power Estimate [xls] and Measurements [xls]
• Visit MCE/MAS Wiki for latest MCE Acquisition Software! 

Design Description

MCE Hardware

Description	Block Diagram	Schematics	Revision
Clock Card  [PDF*]  (S581)	[PDF]	[PDF]	B5
Readout Card  [PDF*]  (S582)	[PDF]	[PDF] [PDF]	B9 D0
Address Card  [PDF*]  (S584)	[PDF]	[PDF] [PDF]	C4 D0
Bias Card  [PDF*]  (S583)	[PDF]	[PDF] [PDF] [PDF]	D6 D7/8 E0
Power Supply Unit Assembly (S585) [doc]      Power Supply Unit Board (S585-103)      Power Supply Unit Controller (S585-102)      Power Supply Unit Wiring (S585-104)	[ ]	[PDF] [PDF] [PDF]	B G8 B
Bus Backplane MCEv1  [PDF*]  (S586)	[PDF] (SC2-ELE-563-100)	[PDF]	C
Instrument Backplane MCEv1 [PDF*]  (S587-101)	[ ]	[PDF] [PDF]	C3 C5
Bus Backplane MCEv2 (C586)	-	[PDF]	A
Instrument Backplane MCEv2 (C587-101) 3 MDM                                                (C587-201) 5 MDM	[PDF]	[PDF] [PDF]	B
Filter Board MCEv1 (S587-111)		[PDF]	B2
Filter Board MCEv2 (C587-111) - 3 MDM                                                     - 5 MDM	-	[PDF] [PDF]	A
MDM Breakout Test Board MCEv1	[XLS]	-	-

          * Note: Block diagram documents are not updated since early design stages.

• Clock Card Dual-Configuration Technical Note  [PDF]  (SC2-ELE-S8xx-xxx) (Oct. 01, 2003) 
• FPGA Configuration Block Diagram  [PDF]  (SC2-ELE-S560-003) 
• Multi-channel Electronics FPGA Configuration Scheme  [PDF]  (SC2-ELE-S8xx-xxx) (Oct. 03, 2003)
• Subrack Mounting Instructions  [doc]  (SC2-MEC-S580-504) 
• Cryostat Mounting Test Results  [PDF]

External Hardware and Accessories

Description	Block Diagram	Schematics	Revision
24V Power Supply and Power Distribution  [PDF]	[PDF]	[ ]	Obsolete
AC-DC Converter Unit and Power Distribution [doc]       S588-103-101 Rectifier Board        S588-104-101 Controller Board        S588-105-101 Wiring	-	[PDF] [PDF] [PDF]	A A A
Synchronizer Box  [PDF]  (S589)     Internal Wiring (S589-102)     Cable Wiring (S589-103)	[PDF ]	[PDF] [PDF] [PDF]	A
SDSU PCI Interface Board (San Diego State University)	-	[PDF]	5A
Extender Card  [PDF*]  (SC2-ELE-S565-008-003)	-	[PDF]	-
Instrument Bus Tester	-	-	B
2-slot Backplnae	-	[PDF]	-

            Firmware Documentation            Download sof/pof 

• Fibre Protocol between RTL PC and MCE  [xls]
• Bus Backplane Protocol  [doc]
• Communication Protocol between Clock Card and Power-Supply Controller [PDF]
• Data Rate Estimate  [xls]

MAS (MCE Acquisition Software)

• SCUBA-2 Data-Acquisition Software Overview - Part 2 Protocols  [sc2-sof-s200-014-v4.pdf]  (Nov. 04, 2005) (ATC)
• MCE Command Description [PDF]  (SC2-ELE-S580-515) 
• MCE File Formats: [Rev. 2] [Rev. 3.3]  (For MAS file formats check the Wiki)
• Sample auto-tune plots:  
• biasing_ac_sq2fb_switching
• biasing_ac_not_switching

Application Notes

• Characterization and Locking SQUIDs with Multi-Channel Electronics [PDF]  (Jun. 07, 2005) 
• "Functional Description of Read-out Electronics for Time-Domain Multiplexed Bolometers for Millimeter and Sub-millimeter Astronomy" [PDF] (vol. 151, no. 3-4, J. Low-Temp Phys, May 2008)
• "Automated SQUID tuning procedure for kilo-pixel arrays of TES bolometers on the Atacama Cosmology Telescope" [PDF] (SPIE Astronomical Instrumentation Conf, Jun. 2008)
• Tuning Algorithm for ACT SQUIDs - poster [PDF]
• Monitoring MCE Status [doc](Nov. 9, 2006)

Design Analysis 

• Monitoring Voltages/Currents of PSU [xls]
• Main Concerns for the MCE  [PDF]  (Oct. 02, 2003)
• Address Card DAC Bus Scheme  [PDF]
• Analysis of Digital Filters for the Readout Card  [PDF]
• Data Rates for the SCUBA2 Arrays  [PDF]
• Fiber Optics Interface Analysis  [PDF]
• FPGA Asynchronous Communication  [PDF]
• Readout Card Pre-Amplifier settling time tests  [PDF]
• Bias Card Heater and Bolometer Driver Output Noise [PDF]
• Analysis of Readout Card Amplifier Voltage and Current Noise  [PDF]
• Bias Card Heater and Bolometer Driver Output Noise  [PDF]
• Timing Jitter in SCUBA2 Array Readout  [PDF]
• Timing  and Response to Data-Valid Pulses [PDF]

System

• MCE Grounding Diagram  [PDF]  (SC2-ELE-S580-102)
• Data Rates for the SCUBA2 Arrays  [PDF]
• Is MCE Rad tolerant? [doc]

Design Reference Documents

• SCUBA-2 Servo loop Analysis [PDF](SC2-SOF-S200-049)(ATC)
• A calculation of required noise and current swings on the SCUBA-2 MUX wafer leads.  [PDF]  (NIST) 
• SCUBA-2 Data File Format  [PDF]  (ATC)
• SCUBA-2 Digitisation Scheme   [PDF]  (SC2-ANA-S100-041) (ATC)
• SCUBA-2 Architectural Design  [PDF]  (SC2-ANA-S100-045) (ATC)
• SCUBA-2 Data Acquisition to Data Processing Interface  [PDF]  (SC2-SOF-S200-008) (ATC)
• SCUBA-2 and JCMT Secondary Mirror  [PDF]  (SC2-ANA-S100-039) (ATC)
• Time-division SQUID multiplexer for Transition Edge Sensors.  [PDF]  (NIST)
• A Prototype System for SQUID Multiplexing of Large Format Transition Edge Sensor Arrays.  [PDF]  (NIST)
• Bias conditions of dc SQUIDs for a Time Domain SQUID Multiplexer.  [PDF]  (NIST)