def __init__(self, device):
""" Initializes the ITC class. It depends on an visa device
Arguments:
device -- (visa.instrument) a GPIB instrument is required
"""
self.__lcr = device
self.__lcr.term_chars = '\r'
# needed for error free communication
gpib.config(self.__lcr.device, gpib.IbcEOSchar, ord('\r'))
# use REOS und XEOS
gpib.config(self.__lcr.device, gpib.IbcEOSrd, 0x800 | 0x400)
# Setup the device to work as needed for the following functions
self.clear() # Clears the GPIB Bus to prevent problems in communication.
self.__lcr.write("FORM ASCII") # Set data output format to ASCii
self.__lcr.write("TRIG:SOUR BUS") # Set trigger to listen only on gpib-bus
self.__lcr.write("INIT:CONT ON") # Set the system to continuously wait for the next trigger
# Load a list of allowed frequency vaules for the device
self.__frequency_list = np.loadtxt('HP4284A_LCRMeter_frequency_table.par')
# Set a list of all possible meaurement settings
self.__measurement_ident_list = ['CPD', 'CPQ', 'CPG', 'CPRP', 'CSD', 'CSQ', 'CSRS','LPQ', 'LPD', 'LPG',
'LPRP', 'LSD','LSQ', 'LSRS', 'RX', 'ZTD', 'ZTR', 'GB', 'YTD', 'YTR']
# Set variables important for the state of the instrument
self.high_power_mode = False
self.__num_averages = 1 # Has to be preset, because the number averages and the integration time use one LCR-command
self.__integration_time = 'MED'
def __init__(self, device):
""" Initializes the ILM class. It depends on an visa device
Arguments:
device -- (visa.instrument) a GPIB instrument is required
"""
self.ilm = device
self.ilm.term_chars = '\r'
gpib.config(self.ilm.device, gpib.IbcEOSchar, ord('\r'))
# use REOS und XEOS
gpib.config(self.ilm.device, gpib.IbcEOSrd, 0x800 | 0x400)
def __init__(self, device):
""" Initializes the ITC class. It depends on an visa device
Arguments:
device -- (visa.instrument) a GPIB instrument is required
"""
self.itc = device
self.itc.term_chars = '\r'
# needed for error free communication
gpib.config(self.itc.device, gpib.IbcEOSchar, ord('\r'))
# use REOS und XEOS
gpib.config(self.itc.device, gpib.IbcEOSrd, 0x800 | 0x400)
def __init__(self, address: int = 25):
assert (1 <= address <= 32), 'address out of range'
self._device_handler = gpib.dev(0, address)
gpib.config(self._device_handler, gpib.IbaEOSrd, 1)
gpib.config(self._device_handler, gpib.IbaEOSchar, 13)
def initialise_device(handle): # set up device to assert SRQ/RQS
gpib.write(handle, "*CLS") # Clear status registers
gpib.write(handle, "*SRE 32") # Assert SRQ on Event
return
def show_devid(handle): # Show device ID
print query(handle, "*IDN?")
return
print gpib.version() # Show package version
ud = gpib.dev(board, device) # Open the device
gpib.config(board, gpib.IbcAUTOPOLL, 1) # Enable automatic serial polling
gpib.config(ud, gpib.IbcTMO, gpib.T30s) # Set timeout to 30 seconds
show_devid(ud)
initialise_device(ud)
gpib.write(handle, "*TST;*OPC") # Selftest and request OPC event
# Wait for Timeout or Request Service on device
sta = gpib.wait(ud, gpib.TIMO | gpib.RQS)
if (sta & gpib.TIMO) != 0:
print "Timed out"
else:
print "Device asserted RQS"
stb = gpib.serial_poll(ud) # Read status byte
print "stb = %#x" % (stb)
if (stb & gpib.IbStbESB) != 0: # Check for Event Status bit
esr = int(query(ud, "ESR?")) # Read Event Status Register
if (esr & 1) != 0: # Check for operation completed
response = gpib.read(handle,numbytes)
response = response.rstrip("\r\n")
return response
def initialise_device(handle): # set up device to assert SRQ/RQS
gpib.write(handle,"*CLS") # Clear status registers
gpib.write(handle,"*SRE 32") # Assert SRQ on OPC
return
def show_devid(handle): # Show device ID
print query(handle,"*IDN?")
return
print gpib.version() # Show package version
ud = gpib.dev(board,device) # Open the device
gpib.config(board,gpib.IbcTMO, gpib.T30s) # Set timeout to 30 seconds
show_devid(ud);
initialise_device(ud);
gpib.write(handle,"*TST;*OPC") # Initiate selftest and request OPC
# Wait for Timeout or Service Request on board
sta = gpib.wait(board, gpib.TIMO | gpib.SRQI)
if (sta & gpib.TIMO) != 0:
print "Timed out"
else:
print "SRQ asserted "
# For each device which might pull SRQ
stb = gpib.serial_poll(ud) # Read status byte
print "stb = %#x"%(stb)
if (stb & gpib.IbStbRQS) != 0: # Check for RQS bit
print "Device asserted RQS"
if (stb & gpib.IbStbESB) != 0: # Check for Event Status bit
def config(self, option, value):
self.res = gpib.config(self.id, option, value)
return self.res
def config(self, option, value): self.res = gpib.config(self.id, option, value) return self.res