用python读取 keysight E4990a数据

您可以使用Python的PyVISA库来连接Keysight E4990a，并使用该仪器的SCPI命令读取数据。以下是示例代码：

import pyvisa

# Connect to instrument
rm = pyvisa.ResourceManager()
instr = rm.open_resource('TCPIP0::192.168.1.1::inst0::INSTR') # Replace with your instrument's IP address

# Set measurement parameters
instr.write('*RST') # Reset instrument
instr.write(':FUNC:IMP:RANG:AUTO ON') # Set impedance range to automatic
instr.write(':SENS:IMP:RANG 1000') # Set impedance range to 1000 ohms
instr.write(':FORM ASC') # Set data format to ascii

# Configure measurement
instr.write(':SENS:FREQ:CENT 1E6') # Set center frequency to 1 MHz
instr.write(':SENS:FREQ:STAR 1E6') # Set start frequency to 1 MHz
instr.write(':SENS:FREQ:STOP 10E6') # Set stop frequency to 10 MHz
instr.write(':SENS:SWE:POIN 51') # Set number of sweep points to 51

# Initiate measurement and read data
instr.write(':SENS:SWE:MODE HOLD') # Hold measurement
instr.write(':TRIG:SOUR BUS') # Set trigger source to bus
instr.write(':TRIG:IMM') # Trigger measurement
data = instr.query(':CALC:DATA? SDATA') # Read measurement data

# Close instrument connection
instr.close()
rm.close()

print(data)

这将连接到您的Keysight E4990a，并执行一次频率扫描。结果将作为ASCII格式的字符串返回并打印在控制台中。您可以根据需要进一步处理此数据。