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Agilent B29xx -> comments reformatted, speed type "Standard" -> "Medium"
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@afischer-sweepme
afischer-sweepme committed Aug 26, 2024
1 parent 16d0beb commit 94295b2
Showing 1 changed file with 55 additions and 29 deletions.
84 changes: 55 additions & 29 deletions src/SMU-Agilent_B29xx/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -68,11 +68,11 @@ def __init__(self):
self.pulse_mode = True # enables pulsed signal option in GUI

self.speed_types = {
"Very fast (0.01)": "0.01",
"Fast (0.1)": "0.1",
"Standard (1)": "1",
"Slow (10)": "10",
"Very Slow (100)": "100"
"Very fast (0.01)": "0.01",
"Fast (0.1)": "0.1",
"Medium (1)": "1",
"Slow (10)": "10",
"Very slow (100)": "100",
}

def set_GUIparameter(self):
Expand All @@ -88,7 +88,7 @@ def set_GUIparameter(self):
"PulseOnTime": 1e-3, # for use on the B2902B, defined as the pulse width time
"PulseDelay": 0, # for use on the B2902B, defined as the delay time prior to pulse
"PulseOffLevel": 0.0, # bias voltage during pulse-off
"PulseCount": 1, #amount of pulses
"PulseCount": 1, # amount of pulses
# "Average": 1, # not yet supported
}

Expand Down Expand Up @@ -189,7 +189,7 @@ def configure(self):
self.port.write(":SENS%s:FUNC \"VOLT\"" % self.channel)
# measurement mode
self.port.write(":SENS%s:VOLT:NPLC %s" % (self.channel, self.speed_types[self.speed]))
#NPLC definition for sensing voltage
# NPLC definition for sensing voltage
self.port.write(":SENS%s:VOLT:PROT %s" % (self.channel, self.protection))
# Protection with Imax
self.port.write(":SENS%s:VOLT:RANG:AUTO ON" % self.channel)
Expand Down Expand Up @@ -224,25 +224,45 @@ def configure(self):
self.port.write(":FUNC PULS") # switch to pulse output instead of "DC"
self.port.write(":PULS:WIDT %s" % self.ton) # pulse width time
self.port.write(":PULS:DEL %s" % self.toff) # delay prior to pulse
self.port.write(":SOUR%s:SWE:POIN %s" % (self.channel,self.pulsecount)) # setting the amount of pulses by mis-using the sweep function
self.port.write(":SOUR%s:FUNC:TRIG:CONT OFF" % self.channel) # switch off continuous operation of internal trigger
self.port.write(":SOUR%s:WAIT ON" % self.channel) # enables to wait for any change of amplitude past pulse
self.port.write(":SENS%s:WAIT ON" % self.channel) # enables wait time for start of measurement defined by delay
self.port.write(":TRIG%s:TRAN:DEL MIN" % self.channel) # trigger delay hardcoded to 0s

# setting the amount of pulses by mis-using the sweep function
self.port.write(":SOUR%s:SWE:POIN %s" % (self.channel,self.pulsecount))

# switch off continuous operation of internal trigger
self.port.write(":SOUR%s:FUNC:TRIG:CONT OFF" % self.channel)

# enables to wait for any change of amplitude past pulse
self.port.write(":SOUR%s:WAIT ON" % self.channel)

# enables wait time for start of measurement defined by delay
self.port.write(":SENS%s:WAIT ON" % self.channel)

# trigger delay hardcoded to 0s
self.port.write(":TRIG%s:TRAN:DEL MIN" % self.channel)

# delay of measurement after pulse release is triggered; takes care of ramp-up
self.port.write(":TRIG%s:ACQ:DEL %s" % (self.channel, self.acqdelay))

self.port.write(":TRIG%s:ALL:COUN 1" % self.channel) # sets trigger count, 1 for single pulse
self.port.write(":TRIG%s:LXI:LAN:DIS:ALL" % self.channel) # disable LXI triggering
self.port.write(":TRIG%s:ALL:SOUR AINT" % self.channel) # enable internal trigger

self.port.write(":TRIG%s:ALL:COUN %s" % (self.channel, self.pulsecount)) # enables multiple trigger events for the requested amount of pulses
# sets trigger count, 1 for single pulse
self.port.write(":TRIG%s:ALL:COUN 1" % self.channel)

# disable LXI triggering
self.port.write(":TRIG%s:LXI:LAN:DIS:ALL" % self.channel)

# enable internal trigger
self.port.write(":TRIG%s:ALL:SOUR AINT" % self.channel)

# enables multiple trigger events for the requested amount of pulses
self.port.write(":TRIG%s:ALL:COUN %s" % (self.channel, self.pulsecount))

# set trigger daly to minimum; not to be mixed up with pulse delay
self.port.write(":TRIG%s:ALL:TIM MIN" % self.channel)
self.port.write(":FORM:ELEM:SENS VOLT,CURR,TIME,STAT,SOUR") # defining the measurement out sizes
self.port.write(":SYST:TIME:TIM:COUN:RES:AUTO ON") # activates a counter timer reset

# defining the measurement out sizes
self.port.write(":FORM:ELEM:SENS VOLT,CURR,TIME,STAT,SOUR")

# activates a counter timer reset
self.port.write(":SYST:TIME:TIM:COUN:RES:AUTO ON")
else:
self.port.write(":FUNC DC") # std DC output

Expand Down Expand Up @@ -390,13 +410,14 @@ def apply(self):
msg = "Compliance below maximum limit of -6 V for currents above -1.515 A"
raise Exception(msg)

value = str("{:.4E}".format(self.value)) # makes sure that self.value fits into SCPI command in terms of length
# makes sure that self.value fits into SCPI command in terms of length
value = str("{:.4E}".format(self.value))
if self.pulse:
# get channel ready at specified values

self.port.write(":SOUR%s:%s %s" % (self.channel, self.commands[self.source], self.pulseofflevel))

# arming the pulse trigger; mis-using the sweep function with identical start and stop values so we can use number-of-pulses functionality
# arming the pulse trigger; mis-using the sweep function with identical start and stop values
# so we can use number-of-pulses functionality
if self.source.startswith("Current"):
self.port.write(":SOUR%s:CURR:STAR %s" % (self.channel, value))
self.port.write(":SOUR%s:CURR:STOP %s" % (self.channel, value))
Expand All @@ -415,19 +436,24 @@ def apply(self):
def call(self):

if self.pulse:
opcounter = 0 # set counter for operation register request loop back to zero
opcounter = 0 # set counter for operation register request loop back to zero

while True:
self.port.write(":STAT:OPER:COND?") # query SMU for the status of the operation register
opstatus=self.port.read()
if self.channel == "1" and ((int(opstatus)>> 1) & 1) == 1 and ((int(opstatus)>> 4) & 1) == 1: # checks bitwise on operation condition register whether transition and aquisition are finished if currently operating on channel 1 (INT values 2+16, BIT 1 and 4)
self.port.write(":STAT:OPER:COND?") # query SMU for the status of the operation register
opstatus = self.port.read()
# checks bitwise on operation condition register whether transition and acquisition are finished
# if currently operating on channel 1 (INT values 2+16, BIT 1 and 4)
if self.channel == "1" and ((int(opstatus) >> 1) & 1) == 1 and ((int(opstatus) >> 4) & 1) == 1:
break
elif self.channel == "2" and ((int(opstatus)>> 7) & 1) == 1 and ((int(opstatus)>> 10) & 1) == 1: # checks bitwise on operation condition register whether transition and aquisition are finished if currently operating on channel 2 (INT values 128+1024, BIT 7 and 10)
# checks bitwise on operation condition register whether transition and acquisition are finished
# if currently operating on channel 2 (INT values 128+1024, BIT 7 and 10)
elif self.channel == "2" and ((int(opstatus) >> 7) & 1) == 1 and ((int(opstatus) >> 10) & 1) == 1:
break
else:
opcounter += 1 #can be used to define a timeout, but is current not implemented as the time span can vary depending on the amount of pulses and their delays
# can be used to define a timeout, but is current not implemented
# as the time span can vary depending on the amount of pulses and their delays
opcounter += 1
time.sleep(0.5)


if self.pulse:
self.port.write(
Expand Down

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