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import pyvisa
import numpy as np
import matplotlib as mpl
import matplotlib.pyplot as plt
import time
from qolab.hardware import BasicInstrument
from qolab.hardware.scope import SDS1104X
from qolab.hardware.rf_generator import AgilentE8257D
from qolab.feedback import PID
from qolab.data import TraceSetSameX, TraceXY, Trace
def initLog():
errorTrace = Trace("error")
errorTrace.config['unit']='V'
timeTrace = Trace("time")
timeTrace.config['unit']='S'
errorLog = TraceXY("error")
errorLog.x = timeTrace
errorLog.y = errorTrace
freqTrace = Trace("frequency")
freqTrace.config['unit']='Hz'
freqLog = TraceXY("frequency")
freqLog.x = timeTrace
freqLog.y = freqTrace
feedbackTrace = Trace("feedback")
feedbackTrace.config['unit']='Hz'
feedbackLog = TraceXY("feedback")
feedbackLog.x = timeTrace
feedbackLog.y = feedbackTrace
log = TraceSetSameX("timelog")
log.addTrace(errorLog)
log.addTrace(freqLog)
log.addTrace(feedbackLog)
return log
def feedbackLoop(apparatus, nsteps):
# while True:
for i in range(0,nsteps):
adjustRFandLog(apparatus)
apparatus.runStatus = True
def adjustRFandLog(apparatus):
timenow = time.time()
scope = apparatus.scope
rfgen = apparatus.rfgen
pid = apparatus.pid
log = apparatus.log
ch1=scope.getTrace(1, decimate=False)
err = np.mean(ch1.y.values)
fdbck = pid.feedback(err)
freq0 = rfgen.getFreqFixed()
freq = freq0 + fdbck
rfgen.setFreqFixed(freq)
print(f'error = {err}, feedback = {fdbck}, request freq = {freq}')
log.addPointToTrace(timenow)
log.addPointToTrace(err, "error")
log.addPointToTrace(freq0, "frequency")
log.addPointToTrace(fdbck, "feedback")
def updateLogPlot(apparatus):
log = apparatus.log
plt.clf()
log.plot()
plt.pause(.0001)
def updateLogPlotLoop(apparatus):
while True:
updateLogPlot(apparatus)
if not apparatus.runStatus:
break
def updateLogFile(apparatus):
log = apparatus.log
logFileName = apparatus.logFileName
if logFileName is not None:
log.save(logFileName, item_format='.15e')
freqZero = 6834687190
freqDeltaM2 = 6835387164
def main():
apparatus = BasicInstrument()
apparatus.config['Device type'] = 'QOL VAMPIRE HighPower magnetometer'
apparatus.config['Device model'] = 'v0.1'
apparatus.config['FnamePrefix'] = 'locked_magnetometer'
apparatus.config['SavePath'] = '/mnt/qol_grp_data/data.VAMPIRE.HighPower'
print("testing")
rm = pyvisa.ResourceManager()
instr_scope=rm.open_resource('TCPIP::192.168.0.61::INSTR')
scope = SDS1104X(instr_scope)
instr_rfgen=rm.open_resource('TCPIP::192.168.0.114::INSTR')
rfgen = AgilentE8257D(instr_rfgen)
print('------ Header start -------------')
print(str.join('\n', scope.getHeader()))
print(str.join('\n', rfgen.getHeader()))
print('------ Header ends -------------')
# ch1 = scope.getTrace(1)
# traces = scope.getAllTraces()
pid = PID(100,400,0, sign=-1)
apparatus.scope = scope
apparatus.rfgen = rfgen
apparatus.pid = pid
apparatus.log = initLog()
apparatus.runStatus = False
SweepSpan = 10000
apparatus.rfgen.stopFrequencySweep()
apparatus.rfgen.setFreqFixed(freqDeltaM2+100)
apparatus.logFileName = apparatus.getNextDataFile()
print(apparatus.logFileName)
# initial lock
apparatus.logFileName = None
apparatus.pid.reset()
apparatus.runStatus = True
feedbackLoop(apparatus, nsteps=10)
updateLogPlot(apparatus)
# long term lock
apparatus.logFileName = None
apparatus.pid.reset()
apparatus.runStatus = True
feedbackLoop(apparatus, nsteps=100)
updateLogPlot(apparatus)
# apparatus.log.save(apparatus.logFileName, item_format='.15e')
print(apparatus.logFileName)
return(apparatus)
if __name__ == '__main__':
mpl.use("TkAgg")
apparatus=main()
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