Agilent Technologies ESA-E Series Programmer's Manual page 139

Programming Examples
Measuring Harmonic Distortion (RS-232 )
/*
CALC :MARK :TRCK :STAT OF F
/* - 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 */
Chapter 3 3-79