Programming Examples 42Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide 1467# Analyze:# =========================================================def analyze():# Make measurements.# --------------------------------------------------------do_command(":MEASure:SOURce CHANnel1")qresult = do_query_string(":MEASure:SOURce?")print "Measure source: %s" % qresultdo_command(":MEASure:FREQuency")qresult = do_query_string(":MEASure:FREQuency?")print "Measured frequency on channel 1: %s" % qresultdo_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")image_bytes = do_query_ieee_block(":DISPlay:DATA? PNG, COLor")nLength = len(image_bytes)f = open("c:\scope\data\screen.png", "wb")f.write(bytearray(image_bytes))f.close()print "Screen image written to c:\scope\data\screen.png."# Download waveform data.# --------------------------------------------------------# Set the waveform points mode.do_command(":WAVeform:POINts:MODE RAW")qresult = do_query_string(":WAVeform:POINts:MODE?")print "Waveform points mode: %s" % qresult# Get the number of waveform points available.do_command(":WAVeform:POINts 10240")qresult = do_query_string(":WAVeform:POINts?")print "Waveform points available: %s" % qresult# Set the waveform source.do_command(":WAVeform:SOURce CHANnel1")qresult = do_query_string(":WAVeform:SOURce?")print "Waveform source: %s" % qresult# Choose the format of the data returned:do_command(":WAVeform:FORMat BYTE")print "Waveform format: %s" % do_query_string(":WAVeform:FORMat?")# Display the waveform settings from preamble:wav_form_dict = {0 : "BYTE",1 : "WORD",4 : "ASCii",}
