def single_acquisition_example(name, n_events, trigger, trigger_channel):
""" Acquire a set of triggerred single acquisitions for two channels."""
tek_scope = scopes.Tektronix2000(scope_connections.VisaUSB())
# First setup the scope, lock the front panel
tek_scope.lock()
tek_scope.set_active_channel(1)
tek_scope.set_active_channel(2)
tek_scope.set_single_acquisition() # Single signal acquisition mode
tek_scope.set_edge_trigger(trigger, trigger_channel, True) # Falling edge trigger
tek_scope.set_data_mode(49500, 50500)
tek_scope.begin()
# Now create a HDF5 file and save the meta information
file_name = name + "_" + str(datetime.date.today())
results = utils.HDF5File(file_name, 2)
results.add_meta_data("trigger", trigger)
results.add_meta_data("trigger_channel", trigger_channel)
results.add_meta_data("ch1_timeform", tek_scope.get_timeform(1))
results.add_meta_data("ch2_timeform", tek_scope.get_timeform(2))
results.add_meta_dict(tek_scope.get_preamble(1), "ch1")
results.add_meta_dict(tek_scope.get_preamble(2), "ch2")
last_save_time = datetime.datetime.now()
print "Starting data taking at time", last_save_time.strftime("%Y-%m-%d %H:%M:%S")
for event in range(0, n_events):
tek_scope.acquire()
try:
results.add_data(tek_scope.get_waveform(1), 1)
results.add_data(tek_scope.get_waveform(2), 2)
except visa_exceptions.VisaIOError, e:
print "Serious death", e
time.sleep(10)
except Exception, e:
print "Scope died, acquisition lost.", e
time.sleep(10)
def measurement_example(name, n_events, trigger, trigger_channel, y_scale,
cursor_low, cursor_high):
""" Acquire a set of measurements for a triggerred single acquisition on one channel."""
tek_scope = scopes.Tektronix2000(scope_connections.VisaUSB())
# First setup the scope, lock the front panel
tek_scope.lock()
tek_scope.set_active_channel(1)
tek_scope.set_single_acquisition() # Single signal acquisition mode
tek_scope.set_channel_y(1, y_scale)
tek_scope.set_edge_trigger(trigger, trigger_channel,
True) # Falling edge trigger
tek_scope.set_horizontal_scale(1e-8)
tek_scope.set_cursors(cursor_low, cursor_high)
tek_scope.set_measurement("area")
tek_scope.begin()
file_name = name + "_" + str(datetime.date.today())
results = utils.HDF5File(file_name, 1)
results.add_meta_data("trigger", trigger)
results.add_meta_data("trigger_channel", trigger_channel)
results.add_meta_data("cursor_low", cursor_low)
results.add_meta_data("cursor_high", cursor_high)
results.add_meta_data("y_scale", y_scale)
last_save_time = datetime.datetime.now()
print "Starting data taking at time", last_save_time.strftime(
"%Y-%m-%d %H:%M:%S")
for event in range(0, n_events):
tek_scope.acquire()
try:
print tek_scope.get_measurement(1)
results.add_data(tek_scope.get_measurement(1), 1)
except visa_exceptions.VisaIOError, e:
print "Serious death", e
time.sleep(10)
except Exception, e:
print "Scope died, acquisition lost.", e
time.sleep(10)
(options, args) = parser.parse_args()
#Set parameters
box = int(options.box)
channel = int(options.channel)
#Fixed parameters
delay = 1.0 # 1ms -> kHz
cursor_low = -5e-9 # s
cursor_high = 23e-9 # s
trigger_level = 0.5 # half peak minimum
falling_edge = True
min_trigger = -0.005 # -5mV smallest allowed trigger
#run the initial setup on the scope
usb_conn = scope_connections.VisaUSB()
scope = scopes.Tektronix3000(usb_conn)
scope.set_cursor("x", 1, cursor_low)
scope.set_cursor("x", 2, cursor_high)
#Create a new, timestamped, summary file
timestamp = time.strftime("%y%m%d_%H.%M.%S", time.gmtime())
widths = [0, 2000, 4000, 6000, 7000]
last_scale = None
last_trigger = None
for width in widths:
if width == 6000:
last_scale = 0.2
last_trigger = -0.1
elif width == 7000:
last_scale = 0.1
#!/usr/bin/env python # # interactive_example.py # # Simple script to gain interactive control over the scope. # # Author P G Jones - 2013-10-23 <*****@*****.**> : First revision ################################################################################## import scopes import scope_connections tek_scope = scopes.Tektronix2000(scope_connections.VisaUSB()) tek_scope.interactive()
