Agilent Technologies ESA-E Series Programmer's Manual page 77

Programming Examples
Using Marker Delta Mode and Marker Minimum Searc h
#include <conio .h>
#include <ctype .h>
#include <string .h>
#include "visa .h "
#define hpESA IDN E4401B "Hewlett-Packard, E4401B "
#define hpESA IDN E4411B "Hewlett-Packard, E4411B "
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", &cldBuff) ;
iResult = (strncmp( cldBuff, hpESA IDN E4401B, strlen(hpESA IDN E4401B)) & &
strncmp( cldBuff, hpESA IDN_E4411B, strlen(hpESA IDN E4411B))) ;
if( iResult = 0 )
{
/*Set the input port to the 50MHz amplitude reference for the models* /
/*E4411B and E4401B* /
viPrintf(viESA,"CAL :SOUR :STAT ON \n") ;
/* 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 ;
double dMarkerAmplitude = 0 .0 ;
Chapter 3
3-17