Application Notes

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Quick Start Software Guide
The Quick Start Software Guide is an overview of the software supplied to support cPCI, PCI and VME products.
Application Note: Encoder/Commutation Option
Detail use and operation discussion of the Encoder/Commutation option for the synchro/resolver measurement modules.
VME Board Addressing Sheet
VME base address configuration for all VME 64xx cards.
Environmental Specifications for cPCI and VME cards
Information regarding Temperature, Humidity, Vibration and Shock for commercial, MIL (Air-cooled) and MIL (Conduction-cooled) cards.
I/O Board Software Reference Guide
This reference matrix provides a guide to determining which software drivers are available in the various Board Platforms / Architectures (VME, VPX, VXI, cPCI, PCI, PC-104, PMC & ISA) offered by North Atlantic Industries.
AC/Synchro/Resolver/Phase Glossary
This glossary provides many definitions for terms used in describing synchro/ resolver or servo system components.
Motion Electronics in Avionic Systems
A white paper describing the theory behind synchros, resolvers, LVDT's and RVDT's
LVDT Four Wire Mode Setup Procedure
The following Application Note provides the necessary steps to configure an LVDT module that measures the position of an LVDT transducer in four wire mode configuration.
Application Note: User Guide for NAI 2nd Generation Digital to Synchro-Resolver Converters
The intent of this application note is to provide a guide to the understanding and maximum utilization of NAI 2nd generation Digital to Synchro – Resolver (D/S-R) converter modules.
Two Speed Measurement Data for Synchro/Resolver
How 2-Speed Measurement Data for Synchro/Resolver is Calculated and Presented
Multifunction VME I/O Board Features Support Flexible System Architectures
A new generation of I/O boards incorporating multifunction I/O, Bus Master function, Ethernet and system processors provide flexibility for implementation of new VME system architectures.
Synchro/Resolver Handbook Chapter 1 & 2
Synchro/Resolver Theory (3 Meg).Topics include: What are Synchros/Resolvers?, Coarse/Fine Synchro/Resolver systems, Synchro/Resolver Parameters, Synchro and Reliability, Scott T transformers, The representation of Angles in Digital Form and Synchro/Resolver connection conventions.
Synchro/Resolver Handbook Chapter 3
Synchro/Resolver to Digital Conversion.(2.3 Meg) Topics include: Tracking Synchro/Resolver to Digital Converters, Advantages of a tracking converter, Data Transfer, Bandwidth and Transfer of Tracking Converters and Velocity Voltage Outputs from Tracking Converters.
Synchro/Resolver Handbook Chapter 4
Digital to Synchro/Resolver Conversion. Theory of Digital to Synchro/Resolver Conversion. (1.7 Meg)Topics include: Principles of operation, variations of accuracy and performance with reference frequency, quadrature errors and reference phase shift.
Synchro/Resolver Handbook Appendix A
Common Synchro Parameters, Synchro Control Differential Transmitters and Synchro Torque Transmitters and Synchro Torque Receivers.
Synchro/Resolver Handbook Appendix C
How reference waveform distortion affects tracking type Synchro to Digital converters. The following analysis shows the way in which reference waveform distortion is of no practical consequence.
Synchro/Resolver Handbook Appendix F
Effects of Quadrature Signals on a Servo System. The Digital to Synchro converter in a control loop and the effects of phase shifted signals on servo systems.
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Application Note I2C on VPX56-6
Application Note I2C
Application Note for I2C on VPX57-3
Application Note I2C
Application Note Status LED on VPX Power Supplies
Application Note for Status LED on NAI VPX Power Supplies
APPLICATION NOTE:Using ENABLE* / INHIBIT* on VPX Power Supplies
Application note describing use of ENABLE* / INHIBIT* to control power states on NAI VPX Power Supply outputs.
APPLICATION NOTE:Ensuring EMI System Compliance
This Application Note gives recommendations for system setup which will help a power supply comply with EMI requirements
APPLICATION NOTE:I2C Communication on VPX55-3 Power Supply
Application note for using I2C communication on a VPX55-3
APPLICATION NOTE:Using Power Supply Remote Sense
This application note explains what the remote sense feature on a power supply is. It also covers the use and connection of the remote sense feature.
Application Note VBAT on NAI VPX Power Supplies
This application note explains what the VBAT feature on a VPX power supply is.
APPLICATION NOTE:Measuring Ripple on a Switching Power Supply
This Application Note shows the recommended method for measuring ripple on a switching power supply
Current Sharing the 56TS1 power supply
Application Note 56TS1
Power Monitor Comparison Matrix
Matrix comparing features of available Power Monitors
Power Conversion Terminology Help Guide
This guide consists of a glossary of commonly used power conversion technology terms. Many of these terms are used in the NAI product specifications. When reviewing NAI product specifications, this guide can be used as a reference for clarification of these specifications.
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DAQ-35CP0G Data Sheet
Data Acquisition Systems Data Sheet
FCT-35CP0D Data Sheet
Fire Control and Targeting system from NAI
VMS-35CP0A Data Sheet
Vehicle Management Systems from NAI
IVHM-35CP0C Data Sheet
Integrated Vehicle Health Management System datasheet
RDC-35CP0B Data Sheet
Remote Data Concentrator
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DDC Instrument Cross Reference
NAI offers Angle Position Indicators which are form, fit and function replacements for the DDC, "AP-306XX" and "AP-307XX" series of Angle Position Indicators; as well as the "SM-312" series of Synchro/Resplver Simulators.
Motion Electronics in Avionics
A white paper describing the theory behind synchros, resolvers, LVDT's and RVDT's
Effects of Quadrature Signals on a Servo System
The Digital to Synchro converter in a control loop and the effects of phase shifted signals on servo systems.
Harmonic distortion of the Reference Waveform
How reference waveform distortion affects tracking type Synchro to Digital converters. The following analysis shows the way in which reference waveform distortion is of no practical consequence.
Measuring LVDT/RVDT Performance
This application note details set-up and test methods commonly used to perform some of the various measurements done on LVDT and RVDT electromagnetic displacement transducers using the versatile and flexible Model 2250 Digital Phase Angle Voltmeter.
AC/Synchro/Resolver/Phase Definitions
This glossary provides many definitions for terms used in describing synchro/ resolver or servo system components.
Synchro/Resolver Handbook Chapter 1 & 2
Synchro/Resolver Theory (3 Meg).Topics include: What are Synchros/Resolvers?, Coarse/Fine Synchro/Resolver systems, Synchro/Resolver Parameters, Synchro and Reliability, Scott T transformers, The representation of Angles in Digital Form and Synchro/Resolver connection conventions.
Synchro/Resolver Handbook Chapter 3
Synchro/Resolver to Digital Conversion.(2.3 Meg) Topics include: Tracking Synchro/Resolver to Digital Converters, Advantages of a tracking converter, Data Transfer, Bandwidth and Transfer of Tracking Converters and Velocity Voltage Outputs from Tracking Converters.
Synchro/Resolver Handbook Chapter 4
Digital to Synchro/Resolver Conversion. Theory of Digital to Synchro/Resolver Conversion. (1.7 Meg)Topics include: Principles of operation, variations of accuracy and performance with reference frequency, quadrature errors and reference phase shift.
Synchro/Resolver Handbook Appendix A
Common Synchro Parameters, Synchro Control Differential Transmitters and Synchro Torque Transmitters and Synchro Torque Receivers.
Synchro/Resolver Handbook Appendix C
How reference waveform distortion affects tracking type Synchro to Digital converters. The following analysis shows the way in which reference waveform distortion is of no practical consequence.
Synchro/Resolver Handbook Appendix F
Effects of Quadrature Signals on a Servo System. The Digital to Synchro converter in a control loop and the effects of phase shifted signals on servo systems.