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import pyvisa as visa
# Change this variable to the address of your instrument
VISA_ADDRESS = 'TCPIP0::localhost::inst0::INSTR'
# Create a connection (session) to the instrument
resourceManager = visa.ResourceManager()
session = resourceManager.open_resource(VISA_ADDRESS)
session.timeout = 25000
# Command to preset the instrument and deletes the default trace, measurement, and window
session.write("SYST:FPR")
# Create and turn on window 1
session.write("DISP:WIND1:STAT ON")
# ======================== Set up 4 S-Parameters ========================
# Create a S11 measurement
session.write("CALC1:MEAS1:DEF 'S11'")
# Displays measurement 1 in window 1 and assigns the next available trace number to the measurement
session.write("DISP:MEAS1:FEED 1")
# Create a S21 measurement
session.write("CALC1:MEAS2:DEF 'S21'")
# Displays measurement 2 in window 1 and assigns the next available trace number to the measurement
session.write("DISP:MEAS2:FEED 1")
# Create a S12 measurement
session.write("CALC1:MEAS3:DEF 'S12'")
# Displays measurement 3 in window 1 and assigns the next available trace number to the measurement
session.write("DISP:MEAS3:FEED 1")
# Create a S22 measurement
session.write("CALC1:MEAS4:DEF 'S22'")
# Displays measurement 4 in window 1 and assigns the next available trace number to the measurement
session.write("DISP:MEAS4:FEED 1")
# ======================== Set start and stop ========================
session.write("SENS1:FREQ:START 1e9")
session.write("SENS1:FREQ:STOP 2e9")
# ======================== Change the number of points ========================
session.write("SENS1:SWE:POIN 51")
# ======================== Set IFBW ========================
# Set IF Bandwidth to 700 Hz
session.write("SENS1:BAND 700")
# ======================== Take a sweep and read back data ========================
# Perfoms a single sweep
session.write("SENS1:SWE:MODE SING")
opcCode = session.query("*OPC?")
results1 = session.query_ascii_values("CALC1:MEAS1:DATA:FDATA?")
results2 = session.query_ascii_values("CALC1:MEAS2:DATA:FDATA?")
results3 = session.query_ascii_values("CALC1:MEAS3:DATA:FDATA?")
results4 = session.query_ascii_values("CALC1:MEAS4:DATA:FDATA?")
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