tmc_tools.py

#!/usr/bin/env python
"""
Tools for interacting with usbtmc devices
Tim Brooks 2015 <brooks@cern.ch>
"""

from __future__ import print_function
import matplotlib.pyplot as plt
import numpy as np
import usbtmc

VID, PID = 0x0699, 0x036a  # Tektronics TDS 2024B
INST = usbtmc.Instrument(VID, PID)


def plot(values):
    """Plot a blob of data"""
    plt.plot(np.array(values.split(',')))
    plt.tight_layout()
    plt.show()


def main():
    """Simple aquisition demo"""
    INST.timeout = 2000  # Capturing waveforms can take some time...
    INST.write(":data:enc ASCII;")  # ASCII data, please
    INST.write(":data:source CH1;")  # Acquire channel 1
    print(INST.ask("wfmpre?"))  # Print preamble
    data = INST.ask("curve?")
    plot(data)
    # print(data)

if __name__ == '__main__':
    main()