Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 6 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
1 Introduction
This Design Report summarises the design features of the Vista Mount Control System for all
contract items subject of this contract. This Design Report addresses every applicable
requirement specified in the AD01 Technical Specification to the item that is the subject of
this Design Report.
2 Acronyms and Abbreviations
ALT Altitude axis
AM Amplitude Modulation
AZ Azimuth axis
AZ/ALT PDU Azimuth/Altitude Power Drive Unit
CASS Cassegrain Rotator axis
CASS PDU Cassegrain Power Drive Unit
CB Circuit Breaker
CCU Central Control Unit
CCW Counter Clockwise
CW Clockwise
CFE Customer Furnished Equipment
DAC Digital to Analogue Converter
DAQ Data Acquisition Unit
DSP Digital Signal Processor
DVM Digital Volt Meter
EMC Electromagnetic Compatibility
EMI Electromagnetic Interference
ESD Electrostatic Discharge
EU European Union
FOG Fiber Optic Gyroscope
LCD Liquid Crystal Display
LCU Local Control Unit
LVD Low Voltage Directive
LVDT Linear Variable Differential Transformer
MCU Mount Control Unit
MCS Mount Control System
MTBF Mean Time Between Failures
PMU Portable Maintenance Unit
PWB Printed Wiring Board
TFT Thin Film Transistor
VER VertexRSI
VIS VISTA
VISTA Visible and Infrared Survey Telescope for Astronomy
VPO VISTA Project Office
TRE Technical Report