def pescan(function=2, frequency=0.1, amplitude=10.0, shift=0.0, symmetry=50.0, number_of_pre_cycles=1,number_of_points_per_cycle=40.0, detector=mythen, ng=1, nf=1):
#setup function generator
fg.setFunction(function)
fg.setFrequency(frequency)
fg.setAmplitude(amplitude)
fg.setShift(shift)
fg.setSymmetry(symmetry)
sleep(2)
#derived parameters for pescan() function inputs
fg_frequency=fg.getFrequency()
fg_period=1/fg_frequency
starttime=number_of_pre_cycles * fg_period
stoptime=starttime+fg_period
gatewidth=fg_period/number_of_points_per_cycle
voltage.setNumberOfGates(ng)
electrometer.setNumberOfGates(ng)
voltage.addMonitor(1)
electrometer.addMonitor(1)
directory=PathConstructor.createFromDefaultProperty()
scanNumber=scanNumTracker.incrementNumber()
voltage.setFilename(directory+(str(scanNumber)))
electrometer.setFilename(directory+(str(scanNumber)))
#pre-conditioning
fg.setOutput(1)
timer=_Timer()
timer.start()
print "sample pre-conditioning cycles, please wait for %s" % starttime
while(not timer.hasElapsed(starttime)):
sleep(1)
#collection
collectionNumber=0
try:
for t1 in frange(starttime, stoptime, gatewidth):
#print t1
voltage.resetCounter()
voltage.setRepetition(collectionNumber)
electrometer.resetCounter()
electrometer.setRepetition(collectionNumber)
print "move event receiver to delay=%s width=%s" % (t1-starttime, gatewidth)
evr.moveTo([t1-starttime,gatewidth])
mythen.gated(nf, ng, scanNumber, collectionNumber)
collectionNumber += 1
#print "end loop"
interruptable()
except:
raise
finally:
print "end loop"
voltage.removeMonitor()
electrometer.removeMonitor()
#stop ramp output
fg.setOutput(0)
print "scan completed."
''' Created on 15 Feb 2011 @author: fy65 ''' from peloop.functiongenerator import fg from PEScan import pescan #from localStation import mythen # set acquisition parameters - need to be changes for each experiment number_of_pre_cycles=1 fg.setFunction(2) fg.setFrequency(0.1) fg.setAmplitude(10.0) fg.setShift(0.0) fg.setSymmetry(50.0) number_of_points_per_cycle=40.0 number_gates=1 number_frames=1 #derived parameters for pescan() function inputs fg_frequency=fg.getFrequency() fg_period=1/fg_frequency pre_condition_time=number_of_pre_cycles * fg_period stop_time=pre_condition_time+fg_period gate_width=fg_period/number_of_points_per_cycle pescan() #pescan(starttime=pre_condition_time, stoptime=stop_time, gatewidth=gate_width, mythen1=mythen, ng=number_gates, nf=number_frames)