Python: Lecroyのオシロスコープからデータを吸い出す（USB接続）

Get data from lecroy oscilloscope¶

In [1]:

import lecroyparser
import pyvisa
import matplotlib.pyplot as plt

Connection to the oscilloscope¶

In [2]:

rm = pyvisa.ResourceManager()
list = rm.list_resources()
dso = rm.open_resource(list[0])

In [4]:

# for 12 bit data you need to
# change binary data format from byte (8bit) to word (16bit)
dso.write('comm_format Def9, word, bin')
dso.query('comm_format?')
# 'DEF9,BYTE,BIN\n' to 'DEF9,WORD,BIN\n'

Out[4]:

'DEF9,WORD,BIN\n'

for 1ch data¶

In [5]:

dso.write("chdr off")
dso.write(f'c1:wf?')
recv = dso.read_raw()
f = open(f'c1.trc', 'wb+')
f.write(recv)
f.close()
data = lecroyparser.ScopeData(f'c1.trc')
plt.plot(data.x, data.y)

Out[5]:

[<matplotlib.lines.Line2D at 0x1dde103c910>]

get 4channel data¶

In [6]:

rm = pyvisa.ResourceManager()
list = rm.list_resources()
dso = rm.open_resource(list[0])
dso.write("chdr off")
channels = ['c1', 'c2', 'c3', 'c4']

# obtaining data from a lecroy oscilloscope
for ch in channels:
    dso.write(f'{ch}:wf?')
    recv = dso.read_raw()
    # Save the Binary Data Locally
    f = open(f'{ch}.trc', 'wb+')
    f.write(recv)
    f.close()
    # # Terminate Resources
    # rm.close()
    
fig, ax = plt.subplots(1, 4, tight_layout = True, figsize = (6, 1.5))
i = 0
for ch in channels:
    data = lecroyparser.ScopeData(f'{ch}.trc')
    ax[i].plot(data.x * 1000, data.y)
    ax[i].set_title(ch)
    i += 1

In [7]:

dso.close()