Keysight P9241, Scpi Programmer'S Manual

Page: 1327 / 1344

Programming Examples
38
Keysight P9241/42/43A Oscilloscopes SCPI Programmer's Guide 1327
print "Measured frequency on channel 1: %f" % qresult
# Use direct command/query when commands not in command set.
scope.Transport.Command.Invoke(":MEASure:VAMPlitude CHANnel1")
qresult = scope.Transport.Query.Invoke(":MEASure:VAMPlitude? CHANnel1")
print "Measured vertical amplitude on channel 1: %s" % qresult
# Download the screen image.
# --------------------------------------------------------
scope.SCPI.HARDcopy.INKSaver.Command(False)
image_bytes = scope.SCPI.DISPlay.DATA.Query("PNG", "COLor")
nLength = len(image_bytes)
fStream = File.Open("screen_image.png", FileMode.Create)
fStream.Write(image_bytes, 0, nLength)
fStream.Close()
print "Screen image written to screen_image.png."
# Download waveform data.
# --------------------------------------------------------
# Set the waveform points mode.
scope.SCPI.WAVeform.POINts.MODE.Command("RAW")
qresult = scope.SCPI.WAVeform.POINts.MODE.Query()
print "Waveform points mode: %s" % qresult
# Get the number of waveform points available.
scope.SCPI.WAVeform.POINts.CommandPoints(10240)
qresult = scope.SCPI.WAVeform.POINts.Query1()
print "Waveform points available: %s" % qresult
# Set the waveform source.
scope.SCPI.WAVeform.SOURce.Command("CHANnel1")
qresult = scope.SCPI.WAVeform.SOURce.Query()
print "Waveform source: %s" % qresult
# Choose the format of the data returned:
scope.SCPI.WAVeform.FORMat.Command("BYTE")
qresult = scope.SCPI.WAVeform.FORMat.Query()
print "Waveform format: %s" % qresult
# Display the waveform settings from preamble:
wav_form_dict = {
0 : "BYTE",
1 : "WORD",
4 : "ASCii",
}
acq_type_dict = {
0 : "NORMal",
1 : "PEAK",
2 : "AVERage",
3 : "HRESolution",
}
(
wav_form, acq_type, wfmpts, avgcnt, x_increment, x_origin,
x_reference, y_increment, y_origin, y_reference