Programming Examples
40
Keysight InfiniiVision M9241/42/43A PXIe Oscilloscopes SCPI Programmer's Guide
1453
qresult = do_query_string(":TIMebase:SCALe?")
print "Timebase scale: %s" % qresult
do_command(":TIMebase:POSition 0.0")
qresult = do_query_string(":TIMebase:POSition?")
print "Timebase position: %s" % qresult
# Set the acquisition type.
do_command(":ACQuire:TYPE NORMal")
qresult = do_query_string(":ACQuire:TYPE?")
print "Acquire type: %s" % qresult
# Or, set up oscilloscope by loading a previously saved setup.
sSetup = ""
f = open("setup.stp", "rb")
sSetup = f.read()
f.close()
do_command(":SYSTem:SETup #8%08d%s" % (len(sSetup), sSetup), hide_param
s=True)
print "Setup bytes restored: %d" % len(sSetup)
# Capture an acquisition using :DIGitize.
do_command(":DIGitize CHANnel1")
# =========================================================
# Analyze:
# =========================================================
def analyze():
# Make measurements.
# --------------------------------------------------------
do_command(":MEASure:SOURce CHANnel1")
qresult = do_query_string(":MEASure:SOURce?")
print "Measure source: %s" % qresult
do_command(":MEASure:FREQuency")
qresult = do_query_string(":MEASure:FREQuency?")
print "Measured frequency on channel 1: %s" % qresult
do_command(":MEASure:VAMPlitude")
qresult = do_query_string(":MEASure:VAMPlitude?")
print "Measured vertical amplitude on channel 1: %s" % qresult
# Download the screen image.
# --------------------------------------------------------
do_command(":HARDcopy:INKSaver OFF")
sDisplay = do_query_string(":DISPlay:DATA? PNG, COLor")
sDisplay = get_definite_length_block_data(sDisplay)
# Save display data values to file.
f = open("screen_image.png", "wb")
f.write(sDisplay)
f.close()
print "Screen image written to screen_image.png."
