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Can you write a python class for calling all the scpi commands for the Yokogawa aq6370 using the pyvisa library?

Certainly! Here's an example Python class for controlling the Yokogawa AQ6370 optical spectrum analyzer using the PyVISA library and SCPI commands:

python
import visa

class YokogawaAQ6370:
    def __init__(self, address):
        self.rm = visa.ResourceManager()
        self.instr = self.rm.open_resource(address)
        self.instr.read_termination = '\n'
        self.instr.write_termination = '\n'
        
    def query(self, command):
        return self.instr.query(command)
    
    def write(self, command):
        self.instr.write(command)
    
    def read(self):
        return self.instr.read()
    
    def reset(self):
        self.write('*RST')
    
    def set_center_wavelength(self, wavelength):
        self.write(f':SENS:WAV:CEN {wavelength:.3f}')
        
    def set_span(self, span):
        self.write(f':SENS:WAV:SPAN {span:.3f}')
        
    def set_resolution_bandwidth(self, rbw):
        self.write(f':SENS:BAND:RES {rbw:.3f}')
        
    def set_video_bandwidth(self, vbw):
        self.write(f':SENS:BAND:VID {vbw:.3f}')
    
    def set_sweep_points(self, points):
        self.write(f':SENS:SWE:POIN {points:d}')
    
    def set_average_count(self, count):
        self.write(f':SENS:AVER:COUN {count:d}')
    
    def set_average_mode(self, mode):
        if mode.lower() == 'on':
            self.write(':SENS:AVER ON')
        elif mode.lower() == 'off':
            self.write(':SENS:AVER OFF')
        else:
            raise ValueError(f'Invalid average mode: {mode}')
    
    def get_trace_data(self):
        data = self.query(':TRAC:DATA? TRACE1')
        return [float(x) for x in data.split(',')]

To use this class, you would first need to create an instance of the YokogawaAQ6370 class by providing the VISA address of your instrument:

python
aq6370 = YokogawaAQ6370('GPIB0::1::INSTR')

You can then call the methods of the class to control the instrument, such as setting the center wavelength, span, and resolution bandwidth:

python
aq6370.set_center_wavelength(1550)
aq6370.set_span(10)
aq6370.set_resolution_bandwidth(0.1)

You can also get trace data from the instrument:

python
data = aq6370.get_trace_data()

This will return a list of floats representing the trace data. Note that you may need to configure the instrument further (such as setting the measurement mode) before you can get meaningful trace data.

I hope this helps you get started with controlling your Yokogawa AQ6370 using PyVISA!

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