Stanford Research Systems SR844, User Manual

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SR844 RF Lock-In Amplifier
Contents
General Information
Safety and Preparation For Use
i
Contents iii
Specifications v
Chapter 1 Getting Started
Quick Start
1-3
The Basic Lock-In 1-5
X, Y, R, θ and dBm 1-9
Outputs, Offsets and Expands 1-12
Storing and Recalling Setups 1-18
Aux Outputs and Inputs 1-19
Chapter 2 SR844 Basics
What is a Lock-In Amplifier?
2-3
The Functional SR844 2-8
RF Signal Input Path 2-9
Reference Channel 2-10
I.F. Section 2-11
Inside the DSP 2-12
Analog Outputs and Scaling 2-15
What is Dynamic Reserve ? 2-17
Sources of Error 2-19
Using the SR844 as a Double Lock-In 2-22
Noise Measurements 2-23
Intrinsic (Random) Noise Sources 2-24
External Noise Sources 2-25
Chapter 3 Operation
Overview
3-3
Signal Input 3-8
Time Constants 3-11
Sensitivity 3-13
CH1 Display and Output 3-15
CH2 Display and Output 3-20
Reference Section 3-26
Save and Recall 3-30
Interface 3-31
Scan and Rel 3-33
Auto Functions 3-40
Shift Functions 3-41