class TestVirtualMeter(TestCase):
def setUp(self):
self.virtual_meter = VirtualMeter(
qtt.measurements.scans.instrumentName('gates'))
def tearDown(self):
self.virtual_meter.close()
def test_amplitude_parameter(self):
self.assertEqual(self.virtual_meter.amplitude.unit, 'a.u.')
self.assertIsInstance(self.virtual_meter.amplitude(), float)
with self.assertRaises(AttributeError):
self.virtual_meter.amplitude.set(2.0)
def setUp(self):
self.virtual_meter = VirtualMeter(
qtt.measurements.scans.instrumentName('gates'))
def initialize(reinit=False,
nr_dots=2,
maxelectrons=2,
verbose=2,
start_manager=False):
global station, _initialized, model
logger.info('virtualDot: start')
if verbose >= 2:
print('initialize: create virtual dot system')
if _initialized:
if reinit:
close(verbose=verbose)
else:
return station
logger.info('virtualDot: make DotModel')
model = DotModel(name=qtt.measurements.scans.instrumentName('dotmodel'),
verbose=verbose >= 3,
nr_dots=nr_dots,
maxelectrons=maxelectrons,
sdplunger='SD1b')
gate_map = model.gate_map
if verbose >= 2:
logger.info('initialize: DotModel created')
ivvis = []
for ii in range(model.nr_ivvi):
ivvis.append(VirtualIVVI(name='ivvi%d' % (ii + 1), model=model))
gates = virtual_gates(name='gates', gate_map=gate_map, instruments=ivvis)
gates.set_boundaries(gate_boundaries(gate_map))
logger.info('initialize: set values on gates')
gates.set('D0', 101)
for g in model.gates:
gates.set(g, np.random.rand() - .5)
# take into account the voltage divider on the ohmics
for g in gates.parameters.keys():
if g.startswith('O'):
gg = getattr(gates, g)
gg.unit = 'uV'
vawg = SimulationAWG(qtt.measurements.scans.instrumentName('vawg'))
logger.info('initialize: create virtual keithley instruments')
keithley1 = VirtualMeter('keithley1', model=model)
keithley3 = VirtualMeter('keithley3', model=model)
keithley4 = VirtualMeter('keithley4', model=model)
digitizer = SimulationDigitizer(
qtt.measurements.scans.instrumentName('sdigitizer'), model=model)
logger.info('initialize: create station')
station = qcodes.Station(gates,
keithley1,
keithley3,
keithley4,
*ivvis,
vawg,
digitizer,
update_snapshot=False)
station.awg = station.vawg
station.metadata['sample'] = 'virtual_dot'
station.model = model
station.gate_settle = gate_settle
station.depletiongate_name = 'D0'
station.bottomchannel_current = station.keithley3.amplitude
station.jobmanager = None
station.calib_master = None
_initialized = True
if verbose:
print('initialized virtual dot system (%d dots)' % nr_dots)
return station