def save_complex_data_locally(self, filename, format = SaveDataFormat.real_imaginary):
extension = ".csv"
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_complex_data(unique_filename, format)
self._vna.file.download_file(unique_filename, filename)
self._vna.file.delete(unique_filename)
def save_data_locally(self, filename):
extension = ".csv"
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_data(unique_filename)
self._vna.file.download_file(unique_filename, filename)
self._vna.file.delete(unique_filename)
def save_screenshot_locally(self, filename, image_format='JPG'):
extension = ".{0}".format(image_format).lower()
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_screenshot(unique_filename, image_format)
self._vna.file.download_file(unique_filename, filename)
self._vna.file.delete(unique_filename)
def save_measurement_locally(self, filename, ports, format='COMP'):
extension = ".s{0}p".format(len(ports))
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_measurement(unique_filename, ports, format)
self._vna.file.download_file(unique_filename, filename)
self._vna.file.delete(unique_filename)
def save_measurement_locally(self, filename, ports, format='COMP'):
extension = ".s{0}p".format(len(ports))
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_measurement(unique_filename, ports, format)
self._vna.file.download_file(unique_filename, filename)
self._vna.file.delete(unique_filename)
def save_screenshot_locally(self, filename, image_format='JPG'):
extension = ".{0}".format(image_format).lower()
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_screenshot(unique_filename, image_format)
self._vna.file.download_file(unique_filename, filename)
self._vna.file.delete(unique_filename)
def save_screenshot_locally(self, filename, image_format='JPG'):
extension = "." + str(image_format).lower()
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
if self.save_screenshot(unique_filename, image_format):
self.file.download_file(unique_filename, filename)
self.file.delete(unique_filename)
return True
else:
return False
def _active_set(self):
sets = self.sets
if len(sets) == 0:
return None
if len(sets) == 1:
return sets[0]
# create unique trace name
unique_trace_name = 'Trc' + unique_alphanumeric_string()
self.create_trace(unique_trace_name, self.channels[0])
for set in sets:
self.active_set = set
if unique_trace_name in self.traces:
self.delete_trace(unique_trace_name)
return set
return None
def save_nonblocking_sweep(self, localfile, test_ports):
unique_filename = unique_alphanumeric_string() + '.s2p'
scpi = ":MMEM:STOR:TRAC:PORT {0},'{1}',{2},{3}"
scpi = scpi.format(1, \
unique_filename, \
'COMP', \
','.join(map(str, test_ports)))
self._vna.write(scpi)
# this saves the file on the ZVA in the folder
# C:\Rohde&Schwarz\Nwa\
self._vna.pause(5000)
self._vna.file.download_file(unique_filename, localfile)
self._vna.file.delete(unique_filename)
def save_active_set_locally(self, filename):
extension = None
if self.properties.is_zvx():
extension = ".zvx"
elif self.properties.is_znx():
extension = ".znx"
unique_filename = unique_alphanumeric_string() + extension
if not filename.lower().endswith(extension):
filename += extension
self.save_active_set(unique_filename)
current_directory = self.file.directory()
self.file.cd(Directory.recall_sets)
self.file.download_file(unique_filename, filename)
self.file.delete(unique_filename)
self.file.cd(current_directory)
def save_active_set_locally(self, filename):
# must include suffix
filename = self.__add_set_suffix(filename)
suffix = Path(filename).suffix
# save on VNA in RecallSets
temp_file = unique_alphanumeric_string() + suffix
self.save_active_set(temp_file)
# cd into RecallSets
restore_dir = self.file.directory()
self.file.cd(Directory.recall_sets)
# download set file
self.file.download_file(temp_file, filename)
# delete temp file from VNA
self.file.delete(temp_file)
# restore dir
self.file.cd(restore_dir)
def measure(self, data_dir, Vgs, Rg, comment, stabilise_time, use_vna,
use_chuck, init_bilt, **kwargs):
print("===================================")
print("Starting acquisition script...")
chuck_string = ''
vna_string = ''
# initialise instruments
print("Setting up DC sources and voltmeters...")
bilt = Bilt('TCPIP0::192.168.0.2::5025::SOCKET')
if init_bilt:
# source (bilt, channel, range, filter, slope in V/ms, label):
self.sourceVg = sourceVg = BiltVoltageSource(
bilt, "I1", "12", "1", 0.005, "Vg")
else:
self.sourceVg = sourceVg = BiltVoltageSource(bilt,
"I1",
initialise=False)
# voltmeter (bilt, channel, filt, label=None)
self.meterVg = meterVg = BiltVoltMeter(bilt, "I5;C1", "2", "Vgm")
print("DC sources and voltmeters are set up.")
if use_chuck:
print("Setting up Yokogawa for chuck voltage...")
# connect to the Yoko without initialising, this will lead to
# an exception if the Yoko is not properly configured (voltage
# source, range 30V, output ON)
yoko = Yoko7651('GPIB::3::INSTR', initialise=False, rang=30)
chuck_string = '_Vchuck={:.1f}'.format(yoko.get_voltage())
print("Yokogawa is set up.")
if use_vna:
print("Setting up VNA")
self.vna = vna = RohdeSchwarzVNA()
vna.open('GPIB', '20')
c1 = vna.channel(1)
sweeptime = c1.total_sweep_time_ms
c1.manual_sweep = True
c1.s_parameter_group = c1.to_logical_ports((1, 2))
# cf: https://www.rohde-schwarz.com/webhelp/webhelp_zva/program_examples/basic_tasks/typical_stages_of_a_remote_control_program.htm#Command_Synchronization
vna.write("*SRE 32")
vna.write("*ESE 1")
if not c1.sweep_type == 'SEGM': # need to use not == because != is not implemented in Rohde Schwarz library
raise Exception('Please use segmented frequency sweep')
# check if the RF power is the same on both ports and for all
# frequency segments
count = int(vna.query(':SENS:SEGM:COUN?').strip())
vna_pow = None
for i in range(1, count + 1):
seg_pow = float(vna.query(':SENS:SEGM{}:POW?'.format(i)))
if vna_pow is None:
vna_pow = seg_pow
elif vna_pow is not None and seg_pow == vna_pow:
continue
else:
raise Exception(
"Please select the same power for all ports and frequency segments"
)
port1autoatt = int(vna.query(':SOUR:POW1:ATT:AUTO?').strip())
port2autoatt = int(vna.query(':SOUR:POW2:ATT:AUTO?').strip())
if port1autoatt or port2autoatt:
raise Exception("Please do not use automatic attenuators")
port1att = float(vna.query(':SOUR:POW1:ATT?').strip())
port2att = float(vna.query(':SOUR:POW2:ATT?').strip())
if port1att == port2att:
vna_pow -= port1att
else:
raise Exception(
"Please select the same attenuators for both ports")
vna_string = '_pwr={:.0f}'.format(vna_pow)
print("VNA is set up.")
# prepare saving DC data
timestamp = time.strftime('%Y-%m-%d_%Hh%Mm%Ss')
filename = timestamp + vna_string + chuck_string + ('_' + comment
if comment else '')
self.prepare_saving(os.path.join(data_dir, filename + '.txt'))
if use_vna:
# prepare saving RF data
spectra_fol = os.path.join(data_dir, filename)
create_path(spectra_fol)
with open(os.path.join(spectra_fol, 'VNAconfig'), 'w') as f:
f.write(
'# Frequency based segmented sweep setup of Rohde&Schwarz ZVA 67\n'
)
f.write('# Attenuator Port 1: {}\n'.format(port1att))
f.write('# Attenuator Port 2: {}\n'.format(port2att))
f.write('# Seg no.\tfstart\tfstop\tpoints\tbwidth\tpow\n')
count = int(vna.query(':SENS:SEGM:COUN?').strip())
for i in range(1, count + 1):
seg_pow = float(
vna.query(':SENS:SEGM{}:POW?'.format(i)).strip())
bwidth = float(
vna.query(':SENS:SEGM{}:BWID?'.format(i)).strip())
fstart = float(
vna.query(':SENS:SEGM{}:FREQ:STAR?'.format(i)).strip())
fstop = float(
vna.query(':SENS:SEGM{}:FREQ:STOP?'.format(i)).strip())
points = int(
vna.query(':SENS:SEGM{}:SWE:POIN?'.format(i)).strip())
f.write('{:d}\t{:f}\t{:f}\t{:d}\t{:f}\t{:f}\n'.format(
i, fstart, fstop, points, bwidth, seg_pow))
for Vg in Vgs:
if self.flags['quit_requested']:
print("Stopping acquisition.")
return locals()
print("Setting Vg = {}".format(Vg))
# set Vg
sourceVg.set_voltage(Vg)
# wait
time.sleep(stabilise_time)
# read voltages
Vgm = meterVg.get_voltage()
# do calculations
Ileak = (Vg - Vgm) / Rg
# save DC data
self.save_row(locals())
if use_vna:
# save VNA data
print("Getting VNA spectra...")
vna.write("INIT1:IMM; *OPC")
# display sweep progress
progressbar_wait(sweeptime / 1e3)
# make sure sweep is really done
while not int(vna.query("*ESR?").strip()):
time.sleep(0.5)
timestamp = time.strftime('%Y-%m-%d_%Hh%Mm%Ss')
spectrum_file = timestamp + '_Vg=%2.4f' % (Vg)
#vna.channel(1).save_measurement_locally(os.path.join(spectra_fol, spectrum_file), (1,2))
spectrum_file = os.path.join(spectra_fol,
spectrum_file + '.s2p')
unique_filename = unique_alphanumeric_string() + '.s2p'
scpi = ":MMEM:STOR:TRAC:PORT {0},'{1}',{2},{3}"
scpi = scpi.format(1, \
unique_filename, \
'COMP', \
'1,2')
vna.write(scpi)
# this saves the file on the ZVA in the folder
# C:\Rohde&Schwarz\Nwa\
vna.pause(5000)
vna.file.download_file(unique_filename, spectrum_file)
vna.file.delete(unique_filename)
print("Acquisition done.")
return locals()
