Audio Precision ATS-1 Access - Getting Started; Connecting Mains Supply Voltage; Self Test

Audio Precision ATS-1 Access

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ATS-1 Access

User’s Manual

Firmware Version 3.10

October 1998

Audio Precision Part No. 8211.0043

Table of Contents

Table of Contents4
Safety Symbols8
Safety Information9
- Scope of this Manual10
Description10
- Related Documentation11
- Introducing the ATS-1 Access11
- Filter Shapes15
- Identification of Features and Options17
- Block Diagrams19
  - Overall Block Diagram19
- Generator Output Circuit21
- Analyzer Input Circuit23
Getting Started25
- Connecting Mains Supply Voltage25
- Rackmounting26
- Concepts and Terminology26
  - Analog Vs. Digital26
  - Balanced Vs. Unbalanced27
- Self Test28
Operational Overview33
- Front Panel Controls and Connectors33
- LCD Display36
- Dbr Zero Key37
- GPIB Status Indicators37
- CONTRAST Control37
- MONITOR Operation38
- POWER Switch38
Setup Panel42
Screen Saver43
Controlling the Generator44
- Generator Overview44
  - Generator Loading46
Controlling the Analyzer47
- Analyzer Overview47
- Input Selection Keys48
- FUNCTION Keys48
Units49
- Is It Dbm or Dbu52
  - Power Units53
- Time and Frequency Units54
- Phase Units55
Generator Output and Analyzer Input Connectors56
Rear Panel Connectors57
- Trigger Output57
- Monitor Outputs58
- Printer Connector58
- GPIB Interface59
- Power Cord Connector and Line Voltage Selector59
External Connections60
- Analog Inputs and Outputs60
Input and Output Cables62
- BNC Connector Panel62
- Unbalanced Connections with the XLR Connector Panel65
- Unbalanced Stereo Connections67
FUNCTION Descriptions70
- Amplitude70
- Noise72
- Level73
- THD+N (Total Harmonic Distortion Plus Noise)75
- Understanding THD+N79
- Surprises and Pitfalls in THD+N Measurements81
  - What Signal Is Dominant81
  - Selecting Bandwidth82
  - Changes with Frequency85
  - Changes with Amplitude86
  - THD+N at 100% (or 0 Db)87
  - Isolating Sources of THD+N88
- Sinad90
- Phase93
- IMD95
- Ratio97
- W+F (Wow and Flutter)100
- W+F (Wow and Flutter)101
- XTALK (Crosstalk)102
- AC Mains (Power Line Monitor)104
- Gen Load106
- Bargraphs108
- Sweeps110
  - Starting the Sweep113
  - Continuous Sweeps113
  - External Sweeps114
- Printing114
- Saving and Recalling Setups119
- Saving and Recalling Setups120
- Printing Saved Data121
Applications123
- Frequency Response of Amplifiers, Mixing Consoles, Etc123
- Audio Transmission Link Testing123
- Analog Tape Recorder Alignment and Performance Verification124
  - Record-Reproduce Mode125
- Compact Disc Players127
Appendix A - Changing Mains Voltage Selection129
- Checking the Selected Line Voltage129
- Changing the Line Voltage Selection130
- Checking the Fuse Block Orientation131
- Changing the Fuse Block Orientation132
- Checking the Fuses133
Appendix B - Rackmounting135
- Fixed Rack Mount136
Appendix C - Performing Internal Changes139
- Opening the Case139
- Changing to Alternate Connector Panels140
- Swapping Speaker and Connector Panels141
- Option Filter Installation144
- Monitor Source Selection145
Appendix D - Specifications147
Index160

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