SRS Labs SR850 User Manual
Page 3
TABLE OF CONTENTS
1-1
GENERAL INFORMATION
Safety and Preparation for Use
1-3
Specifications
1-5
Abridged Command List
1-7
GETTING STARTED
Your First Measurements
2-1
The Basic Lock-in
2-3
Displays and Traces
2-7
Outputs, Offsets and Expands
2-13
Scans and Sweeps
2-17
Using the Disk Drive
2-23
Aux Outputs and Inputs
2-31
Trace
Math
2-35
SR850 BASICS
What is a Lock-in Amplifier?
3-1
What Does a Lock-in Measure?
3-3
The SR850 Functional Diagram
3-5
Reference
Channel
3-7
Phase Sensitive Detectors
3-9
Time Constants and DC Gain
3-11
DC Outputs and Scaling
3-13
Dynamic
Reserve
3-17
Signal Input Amplifier and Filters
3-19
Input
Connections
3-21
Intrinsic (Random) Noise Sources
3-23
External Noise Sources
3-25
Noise
Measurements
3-27
OPERATION
FRONT PANEL
4-1
Power On/Off and Power On Tests
4-1
Video
Display
4-1
Soft
Keys
4-2
Keypad
4-2
Spin
Knob
4-2
Disk
Drive
4-2
Front Panel BNC Connectors
4-2
SCREEN DISPLAY 4-5
Default
Display
4-5
Data
Traces
4-6
Single/Dual Trace Displays
4-7
Bar
Graphs
4-9
Polar
Graphs
4-10
Strip
Charts
4-11
Trace Scans, Sweeps and Aliasing
4-13
Settings and Input/Output Monitor
4-15
Menu
Display
4-15
Status
Indicators
4-16
KEYPAD 4-19
Normal and Alternate Keys
4-19
Menu
Keys
4-19
Additional
Menus
4-20
Entry
Keys
4-20
START/CONT and PAUSE/RESET
4-20
CURSOR
4-21
ACTIVE
DISPLAY
4-21
MARK
4-21
CURSOR
MAX/MIN
4-22
AUTO
RESERVE
4-22
AUTO
GAIN
4-22
AUTO
PHASE
4-22
AUTO
SETUP
4-22
AUTOSCALE
4-22
PRINT to a PRINTER
4-23
PRINT to a FILE
4-23
HELP
4-23
LOCAL
4-23
REAR PANEL
4-25
Power Entry Module
4-25
IEEE-488
Connector
4-25
RS232
Connector
4-25
Parallel Printer Connector
4-25
PC Keyboard Connector
4-25
Rear Panel BNC Connectors
4-26
Aux Inputs (A/D Inputs)
4-26
Aux Outputs (D/A Outputs)
4-26
X and Y Outputs
4-26
Signal Monitor Output
4-26
Trigger
Input
4-27
TTL Sync Output
4-27
Preamp
Connector
4-27
USING SRS PREAMPS 4-27
MENUS
Menu
Guide
5-1
Default
Settings
5-2
Reference and Phase Menu
5-3
Input and Filters Menu
5-7
Gain and Time Constant Menu
5-9
Output and Offset Menu
5-15
Trace and Scan Menu
5-17
Display and Scale Menu
5-21
Aux Outputs Menu
5-25
Cursor Setup Menu
5-29
Edit Mark Menu
5-31
Math
Menu
5-33
Disk
Menu
5-41
System Setup Menu
5-49
PROGRAMMING
GPIB
Communications
6-1
RS232
Communications
6-1
Status Indicators and Queues
6-1
Command
Syntax
6-1