SRS Labs SR530, Lock-In Amplifier manual Abridged Command List

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Abridged Command List

AX

Auto offset X

AY

Auto offset Y

AR

Auto offset R

AP

Auto phase

B

Return Bandpass Filter Status

B0

Take out the Bandpass Filter

B1

Put in the Bandpass Filter

C

Return the Reference LCD Status

C0

Display the Reference Frequency

C1

Display the Reference Phase Shift

D

Return Dynamic Reserve Setting

D0

Set DR to LOW range

D1

Set DR to NORM range

D2

Set DR to HIGH range

En

Return Channel n (1 or 2) Expand

 

Status

En,0

Turn Channel n Expand off

En,1

Turn Channel n Expand on

FReturn the Reference Frequency

GReturn the Sensitivity Setting

G1

Select 10 nV Full-Scale

...

(G1-G3 with SRS preamp only)

G24

Select 500 mV Full-Scale

HReturn Preamp Status (1=installed)

IReturn the Remote/Local Status

I0

Select Local: Front panel active

I1

Select Remote: Front panel inactive

I2

Select Remote with full lock-out

J

Set RS232 End-of-Record to <cr>

Jn,m,o,p

Set End-of-record to n,m,o,p

K1

Simulates Key-press of button #1

...

(see un-abridged command list)

K32

Simulates Key-press of button #32

L1

Return Status of Line Notch Filter

L1,0

Remove Line Notch Filter

L1,1

Insert Line Notch Filter

L2

Return Status of 2XLine Filter

L2,0

Remove 2XLine Notch Filter

L2,1

Insert 2XLine Notch Filter

M

Return the f/2f Status

M0

Set reference mode to f

M1

Set reference mode to 2f

N

Return the ENBW setting

N0

Select 1 Hz ENBW

N1

Select 10 Hz ENBW

OX

Return X Offset Status

OX 0

Turn off X Offset

OX 1,v

Turn on X Offset, v = offset

OY

Return Y Offset Status

OY 0

Turn off Y Offset

OY 1,v

Turn on Y Offset, v = offset

OR

Return R Offset Status

OR 0

Turn off R Offset

OR 1,v

Turn on R Offset, v = offset

P

Return the Phase Setting

Pv

Set the Phase to v. Abs(v) <999 deg

Q1

Return the Channel 1 output

Q2

Return the Channel 2 output

QX

Return the X Output

QY

Return the Y Output

R

Return the trigger mode

R0

Set the trigger for rising edge

R1

Set the trigger for + zero crossing

R2

Set the trigger for falling edge

S

Return the display status

S0

Display X and Y

S1

Display X and Y Offsets

S2

Display R and Ø

S3

Display R Offset and Ø

S4

Display X and Y noise

S5

Display X5 and X6 (ext D/A)

T1

Return pre-filter setting

T1,1

Set the pre-filter TC to 1 mS

...

 

T1,11

Set the pre-filter TC to 100 S

T2

Return the post-filter setting

T2,0

Remove post filter

T2,1

Set the post filter TC to 0.1 S

T2,2

Set the post filter TC to 1.0 S

V

Return the value of the SRQ mask

Vn

Set the SRQ Mask to the value n

 

(See the Status Byte definition)

W

Return the RS232 wait interval

Wn

Set RS232 wait interval to nX4mS

Xn

Return the voltage at the rear panel

 

analog port n. (n from 1 to 6)

X5,v

Set analog port 5 to voltage v

X6,v

Set analog port 6 to voltage v

Y

Return the Status Byte value

Yn

Test bit n of the Status Byte

ZReset to default settings and cancel all pending commands.

7

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Contents Model SR530 Page Table of Contents Appendix C Gpib NON-OPERATING OperatingPage SR530 Specification Summary Gpib DemodulatorFront Panel Summary Enbw Abridged Command List Status Byte Definition Configuration SwitchesSensitivity Signal InputsSignal Filters SR510 Guide to Operation Front PanelChannel 1 Display Dynamic ReserveStatus Display SelectOffset Channel OutputOutput Channel Rel ChannelChannel 2 Display Expand ChannelRcosø Output Auto Phase Trigger Level Rsinø OutputReference Input Time Constant Reference ModePhase Controls Reference DisplayLocal and Remote PowerDefaults SR530 Guide to Operation Rear Panel Page Front Panel Status LEDs Command SyntaxSR530 Guide to Programming Communicating with the SR530Try-Out with an Ascii Terminal RS232 Echo and No Echo OperationLOW Norm High SR530 Command ListN1,n2,n3,n4 Page Bit ErrorsStatus Byte Common Software Problems include ResetTrouble-Shooting Interface Problems Common Hardware Problems includeSR530 with the Gpib Interface SR530 with the RS232 InterfaceSR530 with Both Interfaces Serial Polls and Service RequestsGpib with RS232 Echo Mode Measurement Example Lock-in TechniqueShielding and Ground Loops Understanding the SpecificationsPage Page SR530 Block Diagram DC Amplifiers and System Gain Signal ChannelPhase Sensitive Detectors Reference ChannelCircuit Description Demodulator and Low Pass Amplifier Reference OscillatorMicroprocessor Control Analog Output and ControlExpand Front PanelGpib Interface Power SuppliesRS232 Interface Calibration and Repair Multiplier AdjustmentsAmplifier and Filter Adjustments Replacing the Front-End Transistors Notch FiltersNon-Essential Noise Sources Appendix a Noise Sources and CuresPage Page Case 2 RS232 with Control Lines Case 1 The Simplest ConfigurationAppendix B Introduction to the RS232 Baud RateFinal Tip Stop BitsParity Voltage LevelsBus Description Appendix C Introduction to the GpibProgram Example IBM PC, Basic, via RS232 Appendix D Program ExamplesProgram Example IBM PC, Microsoft Fortran v3.3, via RS232 Page #include stdio.h Program Example IBM PC, Microsoft C v3.0, via RS232Page Program Example 4 IBM PC,Microsoft Basic, via Gpib ′INCREMENT X6 Output by 2.5 MV Program Example HP85 via Gpib Documentation Dpdt Oscillator Board Parts ListPC1 SW1BT1 Main Board Parts ListBR1 BR2SR530 Component Parts List SR530 Component Parts List CX1 22U MINPIN D Gpib ShieldedMPSA18 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 Static RAM, I.C Z80A-CPU#4 Flat TIE AnchorTranscover MicaFront 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.