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White Rabbit Calibration
Commit 949a6042 authored by Peter Jansweijer's avatar Peter Jansweijer
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added osc_init

parent 87a5b4db
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Showing with 55 additions and 11 deletions
sw/ab_cal_scripts/lib/LeCroy8254.py
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......@@ -8,7 +8,7 @@ Usage:
LeCroy8254.py -h | --help
IP IP number of the Oscilloscope
(for example: 192.168.32.248 which is its DevNet IP number)
(for example: 192.168.32.243 which is its DevNet IP number)
Options:
-h --help Show this screen.
......@@ -600,6 +600,56 @@ def file_to_waveform(filename):
data_file.close()
return waveform_data
############################################################################
def osc_init(scope, time_base = 50.0e-9):
"""
Initialize the Oscilloscope for the timestamp edge to SFD measurement.
scope -- instance of python-vxi connected to the oscilloscope
time_base -- <float> time base, default 50 ns/div
"""
#scope = vxi11.Instrument("192.168.32.243")
print(scope.ask("*IDN?"))
# Returns '*IDN LECROY,HDO4034-MS,LCRY-HDO,7.9.0'
# Use Channel 1 pulse input
# use Channel 3 Ethernet Frame input
# A fixed trigger level is important for proper timing measurement
# Choose 1.4 Volt for a direct signal but 0.8 Volt when the signal
# is split by a power splitter
scope.write("TRIG_SELECT EDGE,SR,C1")
use_power_splitter = True
if use_power_splitter:
scope.write("C1:TRIG_LEVEL 0.4")
scope.write("C1:Volt_DIV 0.5")
else:
scope.write("C1:TRIG_LEVEL 0.7")
scope.write("C1:Volt_DIV 0.75")
scope.write("C1:COUPLING D50")
scope.write("C1:OFFSET 0.0")
scope.write("C3:COUPLING D50")
scope.write("C3:OFFSET 0.0")
scope.write("C3:Volt_DIV 0.125")
scope.write("C4:COUPLING D50")
scope.write("C4:OFFSET 0.0")
scope.write("C4:Volt_DIV 0.125")
# Trigger in the centre of the screen; important for maximum estimations
# forwarded to function average_edge_to_sfd
scope.write("TRIG_DELAY 0 ns")
scope.write("TIME_DIV "+str(time_base)) # set 50 ns/div
#scope.write("REFERENCE_CLOCK EXTERNAL") # set external refrence clock
return
############################################################################
##
## If run from commandline, we can test the library
......@@ -608,13 +658,9 @@ if __name__ == "__main__":
arguments = docopt(__doc__,version='LeCroy WaveRunner 8254M-MS version 01')
print("aap",arguments)
#print(len(sys.argv))
#print(sys.argv)
if len(sys.argv) >= 2: # just IP number
scope = vxi11.Instrument(sys.argv[1])
#scope = vxi11.Instrument("192.168.32.248")
#scope = vxi11.Instrument("192.168.32.243")
print(scope.ask("*IDN?"))
# Returns '*IDN LECROY,HDO4034-MS,LCRY-HDO,7.9.0'
channels = '1'
......@@ -624,7 +670,6 @@ if __name__ == "__main__":
if len(sys.argv) >= 3: # There are more arguments...
for i in range(1,len(sys.argv)):
option = sys.argv[i].split('=')
print(option)
if option[0] == '-c': # set channels
channels=option[1]
#print("channels:",channels)
......@@ -634,14 +679,13 @@ if __name__ == "__main__":
if option[0] == '-a': # set number of averages
num_avg=int(option[1])
print ("channels:",channels, "num_avg", num_avg)
#print ("channels:",channels, "num_avg", num_avg)
# Use Channel 1 pulse input
# use Channel 3 Ethernet Frame input
# A fixed trigger level (1,4 Volt) is important for proper timing measurement
# scope.write("C1:TRIG_LEVEL 1.4")
scope.write("C1:TRIG_LEVEL 1.4")
scope.write("C1:COUPLING DC50")
# Trigger in the centre of the screen; important for maximum estimations
......
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