Agilent Technologies ESA-E Series Programmer's Manual page 125

Programming Examples
Measuring Harmonic Distortion (HP-IB)
/* CALC:MARK:TRCK:STAT OFF
/* - Reset VISA timeout to 3 seconds
/* - Set units to dBm
/* UNIT:POW DBM
/* - Take a sweep
/* INIT:IMM
/* - Check for operation complete
/* *OPC?
/* - Perform the peak search
/* CALC:MARK:MAX
/* - Read the marker amplitude,this is the fundamental Level*/
/* CALC:MARK:Y?
/* - Change the amplitude units to volts
/* UNIT:POW V
/* - Take a sweep
/* INIT:IMM
/* - Check for operation complete
/* *OPC?
/* - Read the marker amplitude in volts, this is the
/* fundamental amplitude in volts.
/* CALC:MARK:Y?
/* - Read the marker frequency
/* CALC:MARK:X?
/* - Measure each harmonic amplitude as follows:
/* Set the span to 20 MHz
/* SENS:FREQ:SPAN 20 MHZ
/* Set the center frequency to the desired harmonic
/* SENS:FREQ:CENT <freq>
/* Take a sweep and wait for operation complete
/* INIT:IMM
/* *OPC?
/* Perform peak search
/* CALC:MARK:MAX
/* Set VISA timeout to 60 seconds
/* Activate signal track
/* CALC:MARK:TRCK:STAT ON
/* Zoom down to a 100 kHz span
/* SENS:FREQ:SPAN 10E4
/* Take a sweep and wait for operation complete
/* INIT:IMM
/* *OPC?
/* Signal track off
/* CALC:MARK:TRCK:STAT OFF
/* Reset VISA timeout to 3 seconds
/* Perform Peak Search
/* CALC:MARK:MAX
3-70
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Chapter 3