Agilent Technologies Model A.08.xx manual

Programming Examples

Using Marker Delta Mode and Marker Minimum Search

#include <ctype.h> #include <string.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"

ViSession defaultRM, viESA;

ViStatus errStatus;

ViChar	cIdBuff[256] ={0};
char	cEnter = 0;
int	iResult =0;

/*Set the input port to the 50MHz amplitude reference*/ void Route50MHzSignal()

{

viQueryf(viESA, "*IDN?\n", "%t", &cIdBuff);

iResult = (strncmp( cIdBuff, hpESA_IDN_E4401B, strlen(hpESA_IDN_E4401B)) && strncmp( cIdBuff, hpESA_IDN_E4411B, strlen(hpESA_IDN_E4411B)) && strncmp( cIdBuff, hpEMC_IDN_E7401A, strlen(hpEMC_IDN_E7401A)));

if( iResult == 0 )

{

/*Set the input port to the 50MHz amplitude reference for the models*/ /* E4401B, E4411B and E7401A*/

viPrintf(viESA,"CAL:SOUR:STAT ON \n");

}

else

{

/* For the analyzers having frequency limits >= 3GHz, prompt the user*/ /* to connect the amplitude reference output to the input*/

printf ("Connect AMPTD REF OUT to the INPUT \n"); printf ("......Press Return to continue \n");

scanf( "%c",&cEnter);

/*Externally route the 50MHz Signal*/ viPrintf(viESA,"CAL:SOUR:STAT ON \n");

}

}

void main()

{

/*Program Variable*/ ViStatus viStatus = 0; double dStartFreq =0.0; double dStopFreq =0.0;

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