Agilent Technologies E4406A VSA manual Using Markers, Programming Examples, Chapter

Programming Examples

Using Markers

Using Markers

This is the C programming example Markers.c. /*************************************************************************** *Markers.c

*Agilent Technologies 2001

*

*E4406A VSA Series Transmitter Tester using VISA for I/O *The C program does the following:

*Open session to GPIB device at address 18 *Check opening session success

*set the instrument to Basic Mode *Preset the instrument

*Set the input port to the internal 50Mhz reference source *Tune the analyzer to 50MHZ

*Put the analyzer in a single mode *Zoom the spectrum display *Trigger a spectrum measurement *Poll the operation complete query

*Assign marker 1 to the average trace of the spectrum *Put the marker 1 on the signal peak

*Query the 50 MHz signal amplitude *Get the 50 MHz signal amplitude

*Assign marker 2 to the average trace of the spectrum *Assign the marker function NOISE to marker 2 *Position marker 2 on the noise floor

*Query NOISE marker

*Get the NOISE marker reading

*Put the analyzer back to continuous mode

*Calculate the difference between the marker peak and the NOISE marker *Print result to the standard output

*Close session

*******************************************************************************/

#include <stdio.h> #include <stdlib.h>

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