Math Function

This Python example installs a simulated instrument, creates a math function to remove an S2P response for a device in the test setup, performs a limit test to acquire waveforms data, and saves the waveform along with a screen capture.

math-function.py

#!python3

"""This program illustrates turning on a math function in the
Infiniium XR8 oscilloscope.
"""

# Import modules.
import pyvisa
import sys

# Global variables.
oscilloscope_visa_address = "TCPIP0::localhost::hislip0,4880::INSTR"
timeout = 20000  # 20 seconds.


def exit_program():
    """Exit program."""

    # Close connection to oscilloscope.
    sys.stdout.write("Closing oscilloscope connection.\n")
    Infiniium.write(":SYSTem:GTLocal")  # Unlock GUI.
    Infiniium.clear()  # Clear oscilloscope communications interface.
    Infiniium.close()  # Close communications interface to oscilloscope.
    rm.close()  # Close resource manager.
    print("End of program.")
    sys.exit()


def check_error_queue(when):
    """Check error queue."""

    errors_found = False
    while True:
        # Keep reading errors until "No error".
        error_string = Infiniium.query(":SYSTem:ERRor:NEXT? DIAGnostic")
        if error_string:  # If there is an error string value.

            if error_string.find("0,", 0, 2) == -1:  # Not "No error".
                errors_found = True
                print(f"ERROR: {error_string}")

            else:  # "No error"
                break

        else:  # :SYSTem:ERRor:NEXT? DIAGnostic should always return string.
            errors_found = True
            print("ERROR: :SYSTem:ERRor:NEXT? DIAGnostic returned nothing.")
            break

    if errors_found:
        print(f"Exited because error(s) found when: '{when}'")
        exit_program()


# ==========================================================
# Main program:
# ==========================================================

# Connect and initialize oscilloscope.
rm = pyvisa.ResourceManager("C:\\Windows\\System32\\visa64.dll")
try:
    Infiniium = rm.open_resource(oscilloscope_visa_address)
except Exception:
    print(
        f"Unable to connect to oscilloscope at {oscilloscope_visa_address}. Aborting program."
    )
    sys.exit()

Infiniium.timeout = timeout  # Set global timeout.
Infiniium.clear()  # Clear the instrument bus.
# Lock GUI happens automatically.

# Turn on math function.
Infiniium.write(":FUNCtion1:FOPerator AMPLify")
Infiniium.write(":FUNCtion1:PARameters:AMPLify:GAIN 0.75")
Infiniium.write(":FUNCtion1:DISPlay ON")

# Check error queue.
check_error_queue("End of program")

# Exit program.
exit_program()