3-78 Chapter3
Programming Examples
Measuring Harmonic Distortion (RS-232)
Measuring Harmonic Distortion (RS-232)
This C programming example does the following:
• Open a serial session at COM1/COM2
• Clear the analyzer
• Reset the analyzer.
• Set the input port to the 50 MHz amplitude reference.
• Set the analyzer center frequency to the fundamental frequency.
• Set the analyzer to 10 MHz span.
• Put the analyzer in a single sweep mode.
• Trigger a sweep.
• Check for operation complete.
• Perform the peak search
• Place the signal at the reference level using the marker-to-reference
level command and take sweep.
• Perform the thepeak search.
• Trigger a sweep.
• Check for operation complete.
• Perform the peak search.
• Perform activates signal track.
• Perform narrow span and wait.
• Check for operation complete.
• De-activate the signal track.
• Set units to dBm.
• Take a sweep and wait for the sweep completion.
• Check for operation complete.
• Perform the peak search.
• Take a sweep and wait for the sweep completion.
• Check for operation complete.
• Read the marker amplitude. This is the fundamental amplitude in
dBm.
• Change the amplitude units to volts
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