Stanford Research Systems SR780, Operating Manual And Programming Reference

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2-2 Analyzer Basics
SR780 Network Signal Analyzer
The Source 2-33
Sine 2-33
Two Tone 2-33
Chirp 2-33
Noise 2-33
Arbitrary 2-33
Windowing 2-34
Source Trigger 2-34
External Trigger 2-34
Octave Analysis 2-35
What is Octave Analysis? 2-35
Band Center Frequencies 2-35
Full Octave Bands 2-35
1/3 Octave Bands 2-35
1/12 Octave Bands 2-35
Octave Measurements 2-36
Octave 2-36
Capture 2-36
User Function 2-37
Octave Averaging 2-37
Linear Time 2-37
Exponential Time 2-37
Equal Confidence 2-38
Peak Hold 2-38
Sound Level Measurement 2-38
Leq 2-38
Impulse 2-38
Peak 2-39
Total Power 2-39
Settling Time 2-40
Swept Sine Measurements 2-41
Why Use Swept Sine? 2-41
Swept Sine Measurement Setup 2-42
Swept Sine Measurements 2-43
Spectrum 2-43
Cross Spectrum 2-43
Transfer Function 2-43
User Function 2-44
Averaging - Settling and Integration 2-44
Sweep Frequency and Auto Resolution 2-45
Input Auto Ranging
2-46
Source Auto Level and Ramping 2-46
Trace Storage 2-48
User Math Functions 2-49
What is a User Function? 2-49
Measurement Groups and Traces 2-49
Units 2-49
Operands 2-50
X Axis 2-50
Operations 2-51
User Function Limits 2-52
Example Functions 2-53
FFT Group 2-53
Octave Group 2-54
Swept Sine Group 2-54
Signal Inputs 2-55
Manual Range 2-55
Auto Range 2-55
Input Noise 2-55
Input Impedance 2-56
Anti-aliasing Filter 2-56
A-Weighting Filter 2-57
Input Transducer Units 2-57
Input Connections 2-58
Single-Ended Connection (A) 2-58
Differential Connection (A-B) 2-58
Common Mode Signals 2-58
AC vs DC Coupling 2-59
Intrinsic (Random) Noise Sources 2-60
Johnson Noise 2-60
Shot Noise 2-60
1/f Noise 2-60
Total Noise 2-60
External Noise Sources 2-61
Capacitive Coupling 2-61
Inductive Coupling 2-62
Resistive Coupling (Ground Loops) 2-63
Microphonics
2-63
Thermocouple Effects 2-64