Agilent Technologies E4406A VSA Series, Programmer'S Manual, Page: 137 / 420

Chapter 3 137
Programming Examples
Saving and Recalling Instrument State Data
Example:
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include "visa.h"
void main ()
{
/*program variables*/
ViSession defaultRM, viVSA;
ViStatus viStatus = 0;
long lComplete = 0;
/*open session to GPIB device at address 18 */
viStatus=viOpenDefaultRM (&defaultRM);
viStatus=viOpen (defaultRM, "GPIB0::18::INSTR",
VI_NULL,VI_NULL, &viVSA);
/*check opening session sucess*/
if(viStatus)
{
printf("Could not open a session to GPIB device at
address 18!\n");
exit(0);
}
/*reset the instrument */
viPrintf(viVSA, "*RST\n");
/*set the input port to the internal 50Mhz reference
source*/
viPrintf(viVSA, "SENS:FEED AREF\n");
/*zoom the spectrum display*/
viPrintf(viVSA, "DISP:FORM:ZOOM1\n");
/*tune the instrument to 50MHZ*/
viPrintf(viVSA, "SENS:FREQ:CENT 50E6\n");
/*change the resolution bandwidth*/
viPrintf(viVSA, "SENS:SPEC:BAND:RES 100E3\n");
/*change the Y Axis Scale/Div*/
viPrintf(viVSA, "DISP:SPEC:WIND:TRAC:Y:SCAL:PDIV 5\n");
/*Change the display refernece level*/
viPrintf(viVSA, "DISP:SPEC:WIND:TRAC:Y:SCAL:RLEV
-15\n");
/*trigger the instrument*/
viPrintf(viVSA, "INIT:IMM;*OPC?\n");
/*poll the operation complete query*/
while (!lComplete)
viScanf (viVSA,"%d",&lComplete);
/*save this state in register 10.