Equipment information

SRS Stanford Research Systems SR810 Amplifier
Manufacturer:
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.

show more

User Manual
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

show more