Instrument Controller

A script to initialize connection with instrument using SCPI through VISA connection.

Method included

1. get_resource_list() -> scan & list available resource
2. open_connection(resource_id) -> connect to an instrument using resource id (VISA address)
3. query(query_str) -> write & read operation based on query SCPI commands
4. write(cmd_str) -> write operation based on SCPI commands, expect to return response
5. read() -> read response from instrument (useful for polling response)
6. query_image(cmd_str) -> read image file from instrument and create BMP image file in current directory (binary block read)

Package used

1. PyVISA (https://pyvisa.readthedocs.io/en/latest/)

Get started

1. Clone the repo
2. Install required python library. (pip install -r requirements.txt)
3. Import and use InstrumentController class to init connection

Examples

Initialize controller class

controller = InstrumentController()

Get available resource lists

print(controller.get_resource_list())

Replace 'GPIB0::14::INSTR' with your instrument's address

instrument_address = 'GPIB0::14::INSTR'

Open connection to instrument

controller.open_connection(instrument_address)

Example usage:

Query the instrument's identity

print(controller.query('*IDN?'))

Write a command to the instrument (replace with an actual command for your instrument)

controller.write('OPERating:FREQuency?')

Read the response from the instrument

print(controller.read())

Read image screenshot from the instrument

controller.query_image('IMAGe:DOWNload?')