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TABLE OF CONTENTS
Condensed Information
SAFETY and Preparation for use 1
Symbols 2
Specifications 3
Front Panel Summary 5
Abridged Command List 6
Status Byte Definition 7
Configuration Switches 7
Guide to Operation
Front Panel 8
Signal Inputs 8
Signal Filters 8
Sensitivity 8
Dynamic Reserve 9
Status Indicators 9
Display Select 9
Output 9
Expand Function 9
Rel Function 9
Offset 10
Time Constants 10
Noise Measurements 10
Reference Input and Trigger Levels 11
Phase Controls 11
Power Switch 12
Local/Remote Operation 12
Default Settings 12
Rear Panel 13
AC Power 13
GPIB (IEEE-488) Connector 13
RS232 Interface 13
Signal Monitor Output 13
Pre-Amp Connector 13
A/D Inputs and D/A Outputs 13
Ratio Feature 13
Internal Oscillator 13
Guide to Programming
Communications 15
Command Syntax 15
Status LED's 15
RS232 Echo Feature 16
Try-out with an ASCII Terminal 16
Command List 17
Status Byte 20
Errors 20
Reset Command 20
Trouble-Shooting Interface Problems 21
Common Hardware Problems 21
Common Software Problems 21
RS232 Interface
Introduction to the RS232 21
Data Communications Equipment 22
Wait Command 22
Termination Sequence 22
GPIB (IEEE-488) Interface
Introduction to the GPIB 22
GPIB Capabilities 22
Response to Special GPIB commands 22
Serial Polls and SRQ's 23
Echo Mode using the RS232 23
Using Both the RS232 & GPIB 23
Lock-in Technique
Introduction to Lock-in Amplifiers 24
Measurement Example 24
Understanding the Specifications 25
Shielding and Ground Loops 25
Dynamic Reserve 26
Current Input 26
Auto-Tracking Bandpass Filter 26
Notch Filters 27
Frequency Range 27
Noise Measurements 27
Output Filters 27
Ratio Capability 27
Computer Interface 27
Internal Oscillator 27
SR510 Block Diagram
Block Diagram 28
Signal Channel 29
Reference Channel 29
Phase-Sensitive Detector 29
DC Amplifier and System Gain 29
Microprocessor System 29
Circuit Description
Introduction 30
Signal Amplifier 30
Current Amplifier 30
Notch Filters 30
Bandpass Filter 30
Reference Oscillator 31
PSD, LP Filters and DC Amplifier 31
Analog Output 31
A/D's 31
D/A's 32
Expand 32
Front Panel 32
Microprocessor Control 32