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Audio Precision ATS-1 Access User Manual
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ATS-1
Acc
ess
User’s
Manual
Firmware V
ersion 3.10
October
1998
Audio
Precision Part No.
821
1.0043
1
3
Table of Contents
Table of Contents
4
Safety Symbols
8
Safety Information
9
Scope of this Manual
10
Description
10
Related Documentation
11
Introducing the ATS-1 Access
11
Filter Shapes
15
Identification of Features and Options
17
IMD Option
17
Connector Panel Options
17
Optional Filters
17
Options Label
18
Block Diagrams
19
Overall Block Diagram
19
Generator Output Circuit
21
Analyzer Input Circuit
23
Getting Started
25
Connecting Mains Supply Voltage
25
Rackmounting
26
Concepts and Terminology
26
Analog Vs. Digital
26
Balanced Vs. Unbalanced
27
Self Test
28
Operational Overview
33
Front Panel Controls and Connectors
33
FUNCTION Keys
33
FREQUENCY Controls
34
AMPLITUDE Controls
34
INPUT Keys
35
OUTPUT Keys
35
INSTRUMENT MODE Keys
36
RECALL/SAVE Key
36
Soft Keys
36
LCD Display
36
Dbr Zero Key
37
GPIB Status Indicators
37
CONTRAST Control
37
MONITOR Operation
38
POWER Switch
38
Setup Panel
42
Screen Saver
43
Controlling the Generator
44
Generator Overview
44
Generator Loading
46
Controlling the Analyzer
47
Analyzer Overview
47
Input Selection Keys
48
FUNCTION Keys
48
Units
49
Is It Dbm or Dbu
52
Power Units
53
Time and Frequency Units
54
Phase Units
55
Generator Output and Analyzer Input Connectors
56
Rear Panel Connectors
57
Trigger Output
57
Monitor Outputs
58
Printer Connector
58
GPIB Interface
59
Power Cord Connector and Line Voltage Selector
59
External Connections
60
Analog Inputs and Outputs
60
Input and Output Cables
62
BNC Connector Panel
62
Unbalanced Connections with the XLR Connector Panel
65
Unbalanced Stereo Connections
67
FUNCTION Descriptions
70
Amplitude
70
Noise
72
Level
73
THD+N (Total Harmonic Distortion Plus Noise)
75
Understanding THD+N
79
Surprises and Pitfalls in THD+N Measurements
81
What Signal Is Dominant
81
Selecting Bandwidth
82
Changes with Frequency
85
Changes with Amplitude
86
THD+N at 100% (or 0 Db)
87
Isolating Sources of THD+N
88
Sinad
90
Phase
93
IMD
95
Ratio
97
W+F (Wow and Flutter)
100
W+F (Wow and Flutter)
101
XTALK (Crosstalk)
102
AC Mains (Power Line Monitor)
104
Gen Load
106
Bargraphs
108
Sweeps
110
Starting the Sweep
113
Continuous Sweeps
113
External Sweeps
114
Printing
114
Saving and Recalling Setups
119
Saving and Recalling Setups
120
Printing Saved Data
121
Applications
123
Frequency Response of Amplifiers, Mixing Consoles, Etc
123
Audio Transmission Link Testing
123
Analog Tape Recorder Alignment and Performance Verification
124
Record-Reproduce Mode
125
Compact Disc Players
127
Appendix A - Changing Mains Voltage Selection
129
Checking the Selected Line Voltage
129
Changing the Line Voltage Selection
130
Checking the Fuse Block Orientation
131
Changing the Fuse Block Orientation
132
Checking the Fuses
133
Appendix B - Rackmounting
135
Fixed Rack Mount
136
Appendix C - Performing Internal Changes
139
Opening the Case
139
Changing to Alternate Connector Panels
140
Swapping Speaker and Connector Panels
141
Option Filter Installation
144
Monitor Source Selection
145
Appendix D - Specifications
147
Index
160
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Audio Precision ATS-1 Access Specifications
General
Brand
Audio Precision
Model
ATS-1 Access
Category
Test Equipment
Language
English
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