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Audio Precision Portable One Plus Access User Manual

Audio Precision Portable One Plus Access
169 pages
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Table of Contents

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Audio Precision Portable One Plus Access Specifications

General IconGeneral
TypeAudio Analyzer
Audio Analyzer TypePortable
Input Channels2
Output Channels2
Analog Generator Outputs2
InterfaceUSB
Dynamic Range120 dB
Power SupplyInternal battery or external power
Weight2.5 kg
Supported Operating SystemsWindows
Digital Generator OutputsAES/SPDIF

Summary

Safety Information

Safety Symbols

Explains symbols for warnings and identification on equipment panels.

Introduction to this Manual

Introducing the Portable One Plus Access

Measurement Functions

Lists the core measurement capabilities of the audio test instrument.

Getting Started

Front Cover and Tilt Bail

Instructions on how to remove the front cover and use the tilt bail for positioning.

Connecting Mains Supply Voltage

Front Panel Overview

Rear Panel Overview

Options Label

Typical Connections

External Connections

Concepts and Terminology: Balanced vs. Unbalanced

Defines and differentiates between balanced and unbalanced audio connection types.

Analyzer Inputs and Generator Outputs

Describes how to connect analyzer inputs and generator outputs to external devices.

Trigger Output

Explains the function and use of the trigger output connector for external synchronization.

Monitor Outputs

Details the two available monitor outputs for listening to audio signals.

Printer Port

GPIB Interface

Operation Overview

Instrument Controls: Contrast, Modes, and Navigation

Adjusting display contrast, navigating instrument modes, and panel selection.

Panels: Main, Bargraph, Print, and Sweep

Understanding the layout and display modes of instrument panels for measurements and printing.

Setup and Management Keys: Recall/Save, Soft Keys, Function Keys

Managing test setups, using soft keys, and selecting measurement functions.

Generator and Analyzer Controls: Input, Output, Frequency, Amplitude

Controlling generator and analyzer parameters like input/output, frequency, and amplitude.

Instrument Settings and Monitoring

dBr Zero Key, Monitor Operation, and Setup Panel

Setting reference levels, monitoring audio signals, and configuring instrument settings.

Screen Saver

Details the instrument's screen saver feature to conserve backlight life.

Controlling the Generator

Generator Overview

General introduction to the generator capabilities and output configurations.

Generator Controls

Explanation of the front panel controls for managing generator functions.

Generator Loading

How generator output impedance affects measurements and calculations.

Controlling the Analyzer

Analyzer Overview

Introduction to the analyzer's measurement functions and capabilities.

Input Selection and Function Keys

Selecting input channels and measurement functions for the analyzer.

Measurement Functions: Amplitude, Noise, Level

Measuring signal amplitude, noise, and level with filter and unit options.

Measurement Functions: THD+N, SINAD, Phase

Measuring distortion, SINAD, and phase shift between signals.

Advanced Measurement Functions

IMD, W+F, Ratio, and Crosstalk

Measuring IMD, Wow/Flutter, Ratio, and Crosstalk.

AC Mains, Gen Load, and Auxiliary Signals

Monitoring AC mains, measuring input impedance, and auxiliary signal specs.

Bargraphs, Sweeps, and External Sweeps

Using bargraphs, creating sweep graphs, and performing external sweeps.

Printing and Setup Management

Printing Instrument Data

Procedures and options for printing instrument data, graphs, and screen dumps.

Saving and Recalling Test Setups

Storing and retrieving instrument configurations and test data.

Printing Saved Data

Procedures for printing previously saved test setup data.

Units Reference

Amplitude Units

Details the various units available for measuring amplitude.

dBm vs. dBu Units

Explains the difference and correct usage of dBm vs. dBu units.

Power and Frequency Units

Describes units for power (Watts, dBm) and frequency (Hz, %).

Phase Units

Defines the unit for phase measurement (degrees).

Applications

Frequency Response and Link Testing

Testing frequency response of audio equipment and audio transmission links.

Analog Tape Recorder Alignment

Guide for aligning and testing analog tape recorders using various functions.

Compact Disc Players Testing

Methods for testing CD players using sweep tones and THD+N measurements.

Detailed Technical Diagrams

Block Diagram

A simplified overview of the instrument's internal circuitry.

Generator and Analyzer Circuit Diagrams

Diagrams illustrating generator output and analyzer input circuitry.

Cable Diagrams

Examples and wiring for balanced, unbalanced, and stereo audio cable connections.

Appendix A - Units Quick Reference

Appendix B - Option Filter Installation

Appendix C - Monitor Source Selection

Appendix D - Line Voltage and Fuse Selection

Checking and Changing Line Voltage

Procedures for checking and changing the instrument's input voltage setting.

Fuse Block and Fuse Checks

Verifying fuse block orientation and checking fuse values.

Appendix E - Filter Shapes

Appendix F - Self Test

Appendix G - Specifications

Analog Signal Outputs

Technical specifications for sine wave, IMD signals, and output characteristics.

Analog Analyzer Specifications

Detailed specs for analyzer inputs, level/frequency meters, phase, noise, filters, and detection.

General and Environmental Specifications

Overall power, temperature, humidity, altitude, EMC, safety, dimensions, and weight.

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