Agilent Technologies ESA-E Series Programmer's Manual page 100

Programming Example s
Reading Trace Data Using 32-bit Real Format (RS-232)
/* - Reset VISA timeout to 3 second s
/* - Remove the "," from the ACSII data
/* - Save the trace data to an ASCII fil e
/* - Close the sessio n
/************************************************************ /
#include <stdio .h>
#include <stdlib .h>
#include <math .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 50MHz amplitude reference* /
void Route5OMHzSignal( )
{
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") ;
/* 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") ;
3-40 Chapter 3