<jupyter_start><jupyter_text>Instrument: `VariableOpticalAttenuator`<jupyter_code>%load_ext autoreload
%autoreload 2
from start import start

voa = start('HP 8156A Optical Attenuator (corinna)')

voa.attenDB = 0
voa.attenDB = 3
voa.attenLin = 0

print(voa.attenDB)  # this should give you the maximum 60

voa.off()<jupyter_output>60.0
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