Agilent Technologies ESA-E Series Programmer's Manual page 90

#include <stdlib.h>
#include <math.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>
#include "visa.h"
#define hpESA_IDN_E4401B
#define hpESA_IDN_E4411B
ViSession defaultRM, viESA;
ViStatus errStatus;
ViChar cIdBuff[256] ={0};
char cEnter ={0};
int iResult =0;
/*Set the input port to 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)));
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");
}
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;
/*Dimension cResult to 13 bytes per sweep point, 8192 sweep points maximum*/
Chapter 3
"Hewlett-Packard, E4401B"
"Hewlett-Packard, E4411B"
Programming Examples
Reading Trace Data Using ASCII Format (RS-232)
3-35