SR530 Command List, LOW Norm High | SRS Labs Lock-In Amplifier

SR530 Command List

The leading letters in each command sequence specify the command. The rest of the sequence consists of parameters. Multiple parameters are separated by a comma. Those parameters shown in {} are optional while those without {} are required. The variables m and n represent integers while v represents a real number. Parameters m and n must be expressed in integer format while v may be in integer, real, or floating point format.

The A command causes the auto offset (rel) function to execute. Auto offset is performed by reading the output and using that value as the appropriate offset. Every time an "AX" command is received, the auto offset function is executed on the X output. The "AY" command auto offsets the Y output. The "AR" command auto offsets the R output. Note that "AX" and "AY" will affect the R output but "AR" will not affect X and Y. The "AP" command will execute the auto-phase routine. This is done by setting the reference phase shift with the present phase difference between the signal and the reference input. The ¯ output then reads zero and the reference display reads the signal phase shift. "AP" maximizes X and minimizes Y but R is unaffected. The A commands may be issued at any time, regardless of the DISPLAY setting.

B {n}

If n is "1", the B command sets the bandpass filter in. If n is "0", the bandpass filter is taken out. If n is absent, then the bandpass filter status is returned.

C {n}

If n is "1", the C command sets the reference LCD display to show the phase setting. If n is "0", the LCD will display the reference frequency. If n is absent, the parameter being displayed (frequency or phase) is returned. Note that the P and F commands are used to read the actual values of the phase and frequency.

D {n}

If n is included, the D command sets the dynamic reserve. If n is absent, the dynamic reserve setting is returned.

nDyn Res

0 LOW

1 NORM

2 HIGH

Note that not all dynamic reserve settings are allowed at every sensitivity.

E m {,n}

The E command sets and reads the status of the output expands. If m is "1", then Channel 1 is selected, if m is "2", Channel 2 is selected. The parameter m is required. If n is "1", the E command expands the selected output channel. If n is "0", the expand is turned off for the selected channel. If n is absent, the expand status of the selected channel is returned. Note that the expands do not affect the X and Y BNC outputs, only the Channel 1 and 2 outputs.

The F command reads the reference frequency. For example, if the reference frequency is 100 Hz, the F command returns the string "100.0". If the reference frequency is 100.0 kHz, the string "100.0E+3" is returned. The F command is a read only command.

G {n}

If n is included, the G command sets the gain (sensitivity). If n is absent, the gain setting is returned.

nSensitivity

1 10 nV

2 20 nV

3 50 nV

4 100 nV

5 200 nV

6 500 nV

71 ∝ V

82 ∝ V

95 ∝ V

1010 ∝ V

1120 ∝ V

1250 ∝ V

13100 ∝ V

14200 ∝ V

15500 ∝ V

161 mV

172 mV

185 mV

1910 mV

2020 mV

2150 mV

22100 mV

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.