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SRS Stanford Research Systems SR810 Amplifier
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Model:
SR810
Date:
1993
Category:
Group:
Description:
DSP Lock In-Amplifier
Information
SIGNAL CHANNEL
Voltage Inputs Single-ended (A) or differential (A-B).
Current Input 106 or 108 Volts/Amp.
Full Scale Sensitivity 2 nV to 1 V in a 1-2-5-10 sequence
(expand off). Input Impedance
Voltage: 10 MΩ+25 pF, AC or DC coupled.
Current: 1 kΩ to virtual ground.
Gain Accuracy ±1% from 20°C to 30°C (notch filters off),
±0.2% Typical
Input Noise 6 nV/√Hz at 1 kHz (typical).
Signal Filters 60 (50) Hz and 120(100) Hz notch filters (Q=4).
CMRR 100 dB at 10 kHz (DC Coupled), decreasing by 6
dB/octave above 10 kHz
Dynamic Reserve Greater than 100 dB (with no signal filters).
Harmonic Distortion -80 dB.
REFERENCE CHANNEL
Frequency Range 1 mHz to 102 kHz
Reference Input TTL (rising or falling edge) or Sine.
Sine input is1 MΩ, AC coupled (>1 Hz). 400 mV pk-pk minimum
signal.
Phase Resolution 0.01°
Absolute Phase Error <1°
Relative Phase Error <0.01°
Phase Noise External synthesized reference: 0.005° rms at 1
kHz, 100 ms, 12 dB/oct.
Internal reference: crystal synthesized, <0.0001° rms at 1 kHz.
Phase Drift <0.01°/°C below 10 kHz
<0.1°/°C to 100 kHz
Harmonic Detect Detect at Nxf where N<19999 and Nxf<102 kHz.
Acquisition Time (2 cycles + 5 ms) or 40 ms, whichever is
greater.
DEMODULATOR
Zero Stability Digital display has no zero drift on all
dynamic reserves.
Analog outputs: <5 ppm/°C for all dynamic reserves.
Time Constants 10 μs to 30 s (reference > 200 Hz). 6, 12,
18, 24 dB/oct rolloff.
up to 30000 s (reference < 200 Hz). 6, 12, 18, 24 dB/oct
rolloff.
Synchronous filtering available below 200 Hz.
Harmonic Rejection -80 dB
INTERNAL Oscillator
Frequency 1 mHz to 102 kHz.
Frequency Accuracy 25 ppm + 30 μHz
Frequency Resolution 4 1/2 digits or 0.1 mHz, whichever is
greater.
Distortion f<10 kHz, below -80 dBc. f>10 kHz, below -70
dBc.1 Vrms amplitude.
Output Impedance 50 Ω
Amplitude 4 mVrms to 5 Vrms (into a high impedance load)
with 2 mV resolution.
(2 mVrms to 2.5 Vrms into 50 Ω load). Amplitude Accuracy 1%
Amplitude Stability 50 ppm/°C
Outputs Sine output on front panel. TTL sync output on rear
panel.
When using an external reference, both outputs are phase
locked to the
external reference.
DISPLAYS
Channel 1 4 1/2 digit LED display with 40 segment LED bar graph.
X, R, X Noise, Aux Input 1 or 2. The display can also be any
of these
quantities divided by Aux Input 1 or 2.
(Y and q are available over the Interface only.)
Offset X, Y and R may be offset up to ±105% of full scale.
(Y via Interface only)
Expand X, Y and R may be expanded by 10 or 100. (Y via
Interface only)
Reference 4 1/2 digit LED display.
Display and modify reference frequency or phase, sine output
amplitude,
harmonic detect, offset percentage (Xor R), or Aux Outputs 1-4.
Data Buffer 8k points from Channel 1 display may be stored
internally. The internal data
sample rate ranges from 512 Hz down to 1 point every 16
seconds. Samples
can also be externally triggered. The data buffer is
accessible only over the
computer Interface.
INPUTS AND OUTPUTS
Channel 1 Output Output proportional to Channel 1 display, or X.
Output Voltage: ±10 V full scale. 10 mA max output current.
X and Y Outputs Rear panel outputs of cosine (X) and sine
(Y) components.
Output Voltage: ±10 V full scale. 10 mA max output current.
Aux. Outputs 4 BNC Digital to Analog outputs.
±10.5 V full scale, 1 mV resolution. 10 mA max output current.
Aux. Inputs 4 BNC Analog to Digital inputs.
Differential inputs with1 MΩ input impedance on both shield
and center
conductor. ±10.5 V full scale, 1 mV resolution.
Trigger Input TTL trigger input triggers stored data samples.
Monitor Output Analog output of signal amplifiers (before
the demodulator).
GENERAL
Interfaces IEEE-488 and RS-232 interfaces standard.
All instrument functions can be controlled through the
IEEE-488 and RS-232
interfaces.
Preamp Power Power connector for SR550 and SR552 preamplifiers.
Power 40 Watts, 100/120/220/240 VAC, 50/60 Hz.
Dimensions 17"W x 5.25"H x 19.5"D
Weight 30 lbs.
Warranty One year parts and labor on materials and workmanship.
Manual Type:
User Manual
Pages:
160
Size:
973.98 Kbytes (997359 Bytes)
Language:
english
Revision:
1.8
Manual-ID:
Date:
2005 01 01
Quality:
Electronic document, no scan, very well readable.
Upload date:
2017 01 01
MD5:
b3eb8d491338a32b59e1d26410a2c8ac
Downloads:
1277
Information
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 2-2
X and R 2-5
Outputs, Offsets and Expands 2-7
Storing and Recalling Setups 2-10
Aux Outputs and Inputs 2-11
SR810 BASICS
What is a Lock-in Amplifier? 3-1
What Does a Lock-in Measure? 3-3
The SR810 Functional Diagram 3-4
Reference Channel 3-5
Phase Sensitive Detectors 3-7
Time Constants and DC Gain 3-8
DC Outputs and Scaling 3-10
Dynamic Reserve 3-12
Signal Input Amplifier and Filters 3-14
Input Connections 3-16
Intrinsic (Random) Noise Sources 3-18
External Noise Sources 3-20
Noise Measurements 3-22
OPERATION
Power On/Off and Power On Tests 4-1
Reset 4-1
[Keys] 4-1
Spin Knob 4-1
Local Lockout 4-2
Front Panel BNC Connectors 4-2
Key Click On/Off 4-2
Front Panel Display Test 4-2
Display Off Operation 4-2
Keypad Test 4-3
Standard Settings 4-4
FRONT PANEL
Signal Input and Filters 4-5
Sensitivity, Reserve, Time Constants 4-7
CH1 Display and Output 4-12
Reference 4-15
Auto Functions 4-18
Setup 4-20
Interface 4-21
Warning Messages 4-23
REAR PANEL
Power Entry Module 4-24
IEEE-488 Connector 4-24
RS-232 Connector 4-24
Aux Inputs (A/D Inputs) 4-24
Aux Outputs (D/A Outputs) 4-24
X and Y Outputs 4-24
Signal Monitor Output 4-25
Trigger Input 4-25
TTL Sync Output 4-25
Preamp Connector 4-25
Using SRS Preamps 4-26
PROGRAMMING
GPIB Communications 5-1
RS-232 Communications 5-1
Status Indicators and Queues 5-1
Command Syntax 5-1
Interface Ready and Status 5-2
GET (Group Execute Trigger) 5-2
DETAILED COMMAND LIST 5-3
Reference and Phase 5-4
Input and Filter 5-5
Gain and Time Constant 5-6
Display and Output 5-8
Aux Input and Output 5-9
Setup 5-10
Auto Functions 5-11
Data Storage 5-12
Data Transfer 5-15
Interface 5-20
Status Reporting 5-21
STATUS BYTE DEFINITIONS
Serial Poll Status Byte 5-23
Service Requests 5-24
Standard Event Status Byte 5-24
LIA Status Byte 5-25
Error Status Byte 5-25
PROGRAM EXAMPLES
Microsoft C, Nationall Instr GPIB 5-27
USING SR510 PROGRAMS 5-31
TESTING
Introduction 6-1
Serial Number 6-1
Firmware Revision 6-1
Preset 6-1
Warm Up 6-1
Test Record 6-1
If A Test Fails 6-1
Necessary Equipment 6-1
Front Panel Display Test 6-2
Keypad Test 6-2
PERFORMANCE TESTS
Self Tests 6-3
DC Offset 6-4
Common Mode Rejection 6-5
Amplitude Accuracy and Flatness 6-6
Amplitude Linearity 6-8
Frequency Accuracy 6-9
Phase Accuracy 6-10
Sine Output Amplitude 6-11
DC Outputs and Inputs 6-13
Input Noise 6-15
Performance Test Record 6-17
CIRCUITRY
Circuit Boards 7-1
CPU and Power supply Board 7-3
DSP Logic Board 7-5
Analog Input Board 7-7
PARTS LISTS
CPU and Power supply Board 7-9
DSP Logic Board 7-13
Analog Board 7-20
Front Panel Display Board 7-27
Miscellaneous and
Chassis Assembly 7-32
SCHEMATIC DIAGRAMS
CPU and Power supply Board
Display Board
Keypad Board
DSP Logic Board
Analog Input Board