def performOpen(self, options={}):
"""Perform the operation of opening the instrument connection"""
# check communication
try:
# open connections
self.digitizer1 = afDigitizerWrapper.afDigitizer()
self.digitizer1.create_object()
self.digitizer2 = afDigitizerWrapper.afDigitizer()
self.digitizer2.create_object()
self.sigGen = afSigGenWrapper.afSigGen()
self.sigGen.create_object()
# get address strings
sVisaDig1 = self.dComCfg['address']
sVisaDig1LO = self.getValue('Local oscillator digitizer 1 VISA')
sVisaDig2 = self.getValue('Digitizer 2 VISA')
sVisaDig2LO = self.getValue('Local oscillator digitizer 2 VISA')
sVisaSigGen = self.getValue('Signal generator VISA')
sVisaSigGenLO = self.getValue('Local oscillator signal generator VISA')
self.nSamples = int(self.getValue('Number of samples'))
self.nTriggers = int(self.getValue('Number of triggers'))
self.nSegments=int(self.getValue('Number of segments'))
self.cAvgSignals = [None]*3
self.cAvgNoise = [None]*3
self.vCorrelation = None
self.dFreq = self.getValue('RF Frequency')
self.nLags = int(self.getValue('Number of lags'))
self.dPrefilter = int(self.getValue('Prefilter'))
self.cTrace = [None]*2
# boot instruments
self.digitizer1.boot_instrument(sVisaDig1LO, sVisaDig1)
self.digitizer2.boot_instrument(sVisaDig2LO, sVisaDig2)
self.sigGen.boot_instrument(sVisaSigGenLO, sVisaSigGen)
# set LO Ref mode to Ext_Daisy, leveling to auto and modulation to CW
self.sigGen.lo_reference_set(0)
self.sigGen.rf_current_level_mode_set(0)
self.sigGen.rf_modulation_source_set(3)
# set modulation mode to generic
self.digitizer1.modulation_mode_set(5)
self.digitizer2.modulation_mode_set(5)
# set LO mode to OXCO for dig 1 and Ext daisy for dig 2
self.digitizer1.lo_reference_set(2)
self.digitizer2.lo_reference_set(2)
except afDigitizerWrapper.Error as e:
# re-cast afdigitizer errors as a generic communication error
msg = str(e)
raise InstrumentDriver.CommunicationError(msg)
def performOpen(self, options={}):
"""Perform the operation of opening the instrument connection"""
# check communication
try:
# open connection
self.sigGen = afSigGenWrapper.afSigGen()
self.sigGen.create_object()
# get address strings
sVisaSigGen = self.dComCfg['address']
sVisaLO = self.getValue('Local oscillator VISA')
self.sigGen.boot_instrument(sVisaLO, sVisaSigGen)
except afSigGenWrapper.Error as e:
# re-cast afSigGen errors as a generic communication error
msg = str(e)
raise InstrumentDriver.CommunicationError(msg)