Stanford Research Systems SR865A, Operation Manual

Page: 7 / 221

Contents v
SR865A DSP Lock-in Amplifier
Contents
Safety and Preparation for Use i
Contents v
SR865A Specifications vii
SR865A Command List x
SR865A Status Bytes xv
Chapter 1
Getting Started 1
Introduction 1
SR865A Front Panel 2
SR865A Touchscreen 4
The Basic Lock-in 9
Using Displays 13
Sensitivity, Offset and Expand 20
Saving and Recalling Setups 25
Aux Outputs and Inputs 28
Scanning 30
Chapter 2
Lock-in Amplifier Basics 37
What is a Lock-in Amplifier? 37
What Does a Lock-in Measure? 40
Block diagram 41
The Reference Oscillator 42
The Phase Sensitive Detectors 43
Time Constants and Sensitivity 44
Outputs and Scales 46
What is Dynamic Reserve Really? 48
The Input Amplifier 50
Input Connections 51
Intrinsic (Random) Noise Sources 54
External Noise Sources 55
Noise Measurements 58
Chapter 3
Operation 61
Introduction 61
Standard Settings 64
Signal Input 65
CH1 and CH2 Outputs: Offset, Ratio and Expand 71
Reference 74
Display 81
Cursor 83