Agilent Technologies E4406A VSA manual Programming Examples

	Programming Examples
	Making an ACPR Measurement in cdmaOne (Option BAC)
ViStatus viStatus	= 0;

char sTraceInfo [1024]= {0}; FILE *fTraceFile;

unsigned long lBytesRetrieved;

/*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);

}

/*increase timeout to 60 sec*/ viSetAttribute(viVSA,VI_ATTR_TMO_VALUE,60000); /*print message to the standard output*/

printf("Getting ACPR measurement results...\nPlease wait...\n\n"); //switch to CDMA MODE

viPrintf(viVSA, "INST CDMA\n"); /* Reset device */ viPrintf(viVSA, "*RST\n");

/*set the analyzer in single mode*/ viPrintf(viVSA, "INIT:CONT 0\n"); /*trigger an ACPR measurement*/ viPrintf(viVSA, "READ:ACPR?;*WAI\n"); /*Get the data into a buffer*/

viRead (viVSA,(ViBuf)sTraceInfo,1024,&lBytesRetrieved); /*set the analyzer in continuous mode*/ viPrintf(viVSA, "INIT:CONT 1\n");

/*save the data to a file*/ fTraceFile=fopen("C:\\ACPR.txt","w"); fprintf(fTraceFile,"ACPR.exe Output\nAgilent Technnologies 2001\n\n");

fprintf(fTraceFile,"The ACPR Measurement Result\n----------------------------\n");

fprintf(fTraceFile,sTraceInfo);

fclose(fTraceFile);

146 Chapter 3