Agilent Technologies Model A.08.xx manual 178

Programming Examples

Making Faster Measurements (multiple measurements)

/*	FORM:DAT INT,32	*/
/* - Select appropriate byte order (Intel)		*/
/*	FORM:BORD SWAP	*/
/* - Repeat the following the requested number of times:		*/
/*	- Trigger a measurement and wait for completion	*/
/*	INIT:*OPC?	*/
/*	- Read the resulting measurement trace	*/
/*	TRAC:DATA? TRACE1	*/
/* - Compute running averaged power at all trace points		*/
/* - Display measurement statistics		*/
/* - Write averaged data to second trace display		*/
/*	TRAC:DATA TRACE2 <definite length block of data>	*/
/* - Enable viewing of second trace		*/
/*	TRACE2:MODE VIEW	*/
/* - Enable local display for viewing		*/
/*	DISP:ENAB ON	*/
/* - Select continuous sweep mode		*/
/*	INIT:CONT ON	*/
/* - Close session and Return instrument to local control		*/

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

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <math.h> #include <sys\timeb.h> #include <visa.h>

#define hpESA_IDN_E4401B "Hewlett-Packard, E4401B" #define hpESA_IDN_E4411B "Hewlett-Packard, E4411B" #define hpEMC_IDN_E7401A "Hewlett-Packard, E7401A"

#define NUM_TRACES 100		/* number of traces to average
*/
#define NUM_POINTS 401		/* requested number of points/trace
*/
#define CENTER 50		/* center frequency in MHz, an integer
*/
#define SPAN 20		/* span frequency in MHz, an integer	*/
#define RBW 300		/* resolution BW in kHz, an integer	*/
#define DISPLAY 0		/* ESA display enable, disable for speed
*/
#define DATA_LENGTH	4	/* number of data bytes in one trace point
*/
#define MAX_POINTS 8192		/* maximum number of points/trace in ESA

178 Chapter 3