SRS Labs Lock-In Amplifier, SR530 manual Demodulator, Gpib

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Acquisition Time

25 Sec at 1 Hz

 

 

6 Sec at 10 Hz

 

 

2 Sec at 10 kHz

 

Slew Rate

1 decade per 10 S at 1 kHz

 

Phase Control

90° shifts

 

 

 

Fine shifts in 0.025° steps

 

Phase Noise

0.01° rms at 1 kHz, 100 msec, 12 dB TC

Phase Drift

0.1°/°C

 

 

 

Phase Error

Less than 1° above 10Hz

 

Orthogonality

90° ± 1°

 

 

Demodulator

 

 

 

 

Stability

5 ppm/°C on LOW dynamic reserve

 

50 ppm/°C on NORM dynamic reserve

 

500 ppm/°C on HIGH dynamic reserve

Time Constants

Pre:

1msec to 100 sec (6 dB/Octave)

 

Post:

1sec, 0.1 sec, none (6 dB/Octave) or none

Offset

Up to 1X full scale (10X on expand)

 

Both channels may be offset

 

Harmonic Rej

-55 dB (bandpass filter in)

 

Outputs & Interfaces

 

 

 

 

Channel 1 Outputs

X (RcosØ), X Offset, R (magnitude), R Offset, X Noise, X5 (external D/A)

Channel 2 Outputs

Y (RsinØ), Y Offset, Ø (phase shift of signal), Y Noise, X6 (external D/A)

Output Meters

2% Precision mirrored analog meter

Output LCD's

Four digit auto-ranging LCD display shows same values as the analog meters

Output BNC's

±10 V output corresponds to full scale input, <1Ω output impedance

X Output

X (RcosØ), ±10 V full scale, < 1 Ω

output impedance

Y Output

Y (RsinØ), ±10 V full scale, < 1 Ω

output impedance

Reference LCD

Four digit LCD display for reference phase shift or frequency

RS232

Interface controls all functions. Baud rates from 300 to 19.2 K

GPIB

Interface controls all functions. ( IEEE-488 Std )

A/D

4 BNC inputs with 13 bit resolution (±10.24 V)

D/A

2 BNC outputs with 13 bit resolution (±10.24 V)

Ratio

Ratio output equals 10X Channel 1 output divided by the Denominator input.

Internal Oscillator

Range:

 

1 Hz to 100 kHz, 1% accuracy

 

Stability:

150 ppm/°C

 

 

Distortion:

2% THD

 

Amplitude: 1% accuracy, 500 ppm/°C stability

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Contents Model SR530 Page Table of Contents Appendix C Gpib Operating NON-OPERATINGPage SR530 Specification Summary Demodulator GpibFront Panel Summary Enbw Abridged Command List Configuration Switches Status Byte DefinitionSignal Inputs Signal FiltersSR510 Guide to Operation Front Panel SensitivityDynamic Reserve StatusDisplay Select Channel 1 DisplayOutput Output ChannelRel Channel Offset ChannelChannel 2 Display Expand ChannelRcosø Output Auto Phase Trigger Level Rsinø OutputReference Input Reference Mode Phase ControlsReference Display Time ConstantLocal and Remote PowerDefaults SR530 Guide to Operation Rear Panel Page Command Syntax SR530 Guide to ProgrammingCommunicating with the SR530 Front Panel Status LEDsRS232 Echo and No Echo Operation Try-Out with an Ascii TerminalSR530 Command List LOW Norm HighN1,n2,n3,n4 Page Bit ErrorsStatus Byte Reset Trouble-Shooting Interface ProblemsCommon Hardware Problems include Common Software Problems includeSR530 with the RS232 Interface SR530 with the Gpib InterfaceSR530 with Both Interfaces Serial Polls and Service RequestsGpib with RS232 Echo Mode Lock-in Technique Measurement ExampleUnderstanding the Specifications Shielding and Ground LoopsPage Page SR530 Block Diagram Signal Channel Phase Sensitive DetectorsReference Channel DC Amplifiers and System GainCircuit Description Reference Oscillator Demodulator and Low Pass AmplifierAnalog Output and Control ExpandFront Panel Microprocessor ControlGpib Interface Power SuppliesRS232 Interface Calibration and Repair Multiplier AdjustmentsAmplifier and Filter Adjustments Notch Filters Replacing the Front-End TransistorsAppendix a Noise Sources and Cures Non-Essential Noise SourcesPage Page Case 1 The Simplest Configuration Appendix B Introduction to the RS232Baud Rate Case 2 RS232 with Control LinesStop Bits ParityVoltage Levels Final TipAppendix C Introduction to the Gpib Bus DescriptionAppendix D Program Examples Program Example IBM PC, Basic, via RS232Program Example IBM PC, Microsoft Fortran v3.3, via RS232 Page Program Example IBM PC, Microsoft C v3.0, via RS232 #include stdio.hPage Program Example 4 IBM PC,Microsoft Basic, via Gpib ′INCREMENT X6 Output by 2.5 MV Program Example HP85 via Gpib Documentation Oscillator Board Parts List PC1SW1 DpdtMain Board Parts List BR1BR2 BT1SR530 Component Parts List SR530 Component Parts List 22U MIN PIN DGpib Shielded CX1MPSA18 CY1FU1 SR530 Component Parts List SR530 Component Parts List SR530 Component Parts List SR530 Component Parts List SR530 Component Parts List SR513 Assy SPSTX84PDT SR530 Component Parts List Z80A-CPU Static RAM, I.CTIE Anchor TranscoverMica #4 FlatFront Panel Board Parts List RED LD3 LD1LD2 Quad Board Parts List SR530 Component Parts List PC1 SR530 Component Parts List Miscellaneous Parts List SR530 Component Parts List

SR530, Lock-In Amplifier specifications

The SRS Labs Lock-In Amplifier, model SR530, is a powerful tool designed for high-precision measurements in the realm of scientific research and industrial applications. This state-of-the-art instrument excels in extracting small signals from noisy environments, making it an invaluable asset for experiments in fields such as physics, engineering, and materials science.

One of the main features of the SR530 is its ability to perform synchronous detection, which is key to improving signal-to-noise ratios. By utilizing a reference signal, the device correlates the incoming signal with the reference to effectively filter out noise, allowing for the accurate measurement of weak signals that might otherwise be obscured. This process of phase-sensitive detection is fundamental to the operation of the Lock-In Amplifier.

The SR530 offers a wide frequency range, covering from 0.1 Hz to 100 kHz. This broad frequency response allows it to handle a diverse array of signals, making it suitable for various applications including optical detection, capacitance measurements, and in many cases, voltammetry. The device is also equipped with multiple inputs and outputs, facilitating the integration with other laboratory equipment and enabling complex experimental setups.

Precision is further enhanced with its adjustable time constant, which allows users to optimize the response time based on experimental needs. The user can choose time constants from 10 microseconds to 10 seconds, accommodating fast dynamic measurements as well as those requiring stability over longer durations.

Another remarkable characteristic of the SR530 is its digital processing capabilities. The device features a highly accurate digital voltage measurement system, minimizing drift and ensuring long-term stability. Additionally, the use of microprocessors enhances data handling and allows for features such as programmable settings, facilitating automated measurements.

Moreover, the SR530 includes a range of output options, including analog outputs, which can be used for direct signal processing, as well as digital interfaces for integration with computers. This ensures that users can not only capture high-fidelity data but also analyze and display it efficiently.

In conclusion, the SRS Labs SR530 Lock-In Amplifier stands out due to its sophisticated technology, versatile features, and robust performance. Its precision, flexibility, and ease of use make it an ideal choice for researchers and engineers looking to unlock the potential of weak signal measurement in complex environments.
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