Measuring Noise - Agilent Technologies ESA-E Series Programmer's Manual

Measuring Noise

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/* Measuring Noise

/*
/* This C programming example does the following.
/* The SCPI instrument commands used are given as
/* reference.
/*
/* - Opens an HP-IB session at address 18
/* - Clears the Analyzer
/* - Resets the Analyzer
/* *RST
/* - Sets the center frequency and span
/* SENS:FREQ:CENT 50 MHZ
/* SENS:FREQ:SPAN 10 MHZ
/* - Set the input port to the 50 MHz amplitude reference
/* CAL:SOUR:STAT ON
/* - Set the analyzer to single sweep mode
/* INIT:CONT 0
/* - Trigger a sweep
/* INIT:IMM
/* - Check for operation complete
/* *OPC?
/* - Set the marker to the maximum peak
/* CALC:MARK:MAX
/* - Set the analyzer to active delta marker
/* CALC:MARK:MODE DELT
/* - Set the delta marker to 2 MHZ
/* CALC:MARK:X 2E+6
/* - Activate the noise marker function
/* CALC:MARK:FUNC NOIS
/* - Trigger a sweep
/* INIT:IMM
/* - Check for operation complete
/* *OPC?
/* - Query the marker delta amplitude from the analyzer
/* CALC:MARK:Y?
/* - Report the marker delta amplitude as the carrier to
/* noise ratio in dBc/Hz
/* - Close the session
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#include <stdio.h>
Chapter 3
Programming Examples
Measuring Noise
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