用信号发生器33120A和锁相放大器7265去测音叉谐振子频率的python代码

以下是使用Python控制Agilent 33120A信号发生器和7265锁相放大器测量音叉谐振子频率的示例代码。在运行此代码之前，需要确保正确连接仪器并安装相关的Python库。具体细节请参考相关文档。

import visa
import time

# Connect to instruments
rm = visa.ResourceManager()
sg = rm.open_resource('GPIB0::10::INSTR') # 33120A signal generator
lockin = rm.open_resource('GPIB0::7::INSTR') # 7265 lock-in amplifier

# Set signal generator parameters
sg.write('*RST')
sg.write('OUTP OFF')
sg.write('FUNC:SHAP SIN')
sg.write('VOLT 1')
sg.write('FREQ 1000')

# Set lock-in amplifier parameters
lockin.write('*RST')
lockin.write('FMOD 0')
lockin.write('HARM 1')
lockin.write('SLVL 0.5')
lockin.write('SENS 22')
lockin.write('OFLT 10')
lockin.write('SYNC 0')

# Wait for instruments to settle
time.sleep(2)

# Sweep signal generator frequency and measure lock-in amplifier output
freq_range = range(500, 1500, 10)
freq_list = []
signal_list = []
for freq in freq_range:
    sg.write('FREQ {}'.format(freq))
    time.sleep(0.1)
    signal = float(lockin.query('OUTP?'))
    freq_list.append(freq)
    signal_list.append(signal)

# Find resonance frequency
resonance_freq = freq_list[signal_list.index(max(signal_list))]

# Print resonance frequency
print('Resonance frequency: {} Hz'.format(resonance_freq))

# Disconnect from instruments
sg.close()
lockin.close()
rm.close()