Agilent Technologies N5183A MXG User Manual

Page 86

Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide

Programming Examples
GPIB Programming Interface Examples

•

resets the signal generator

•

queries the instrument (CW frequency, power level, frequency mode, and RF state)

•

reads responses into the rdBuffer (CW frequency, power level, and frequency mode)

•

turns signal generator RF state off

•

verifies RF state off

The following program example is available on the signal generator Documentation CD- ROM as
visaex3.cpp

//****************************************************************************************

// PROGRAM FILE NAME:visaex3.cpp

// PROGRAM DESCRIPTION:This example demonstrates the use of query commands. The signal

// generator can be queried for conditions and instrument states. These commands are of

// the type "*IDN?"; the question mark indicates a query.

//****************************************************************************************

#include

#include "StdAfx.h"

#include

using namespace std;

void main ()

{

ViSession defaultRM, vi; // Declares variables of type ViSession

// for instrument communication

ViStatus viStatus = 0; // Declares a variable of type ViStatus

// for GPIB verifications

char rdBuffer [256]; // Declares variable to hold string data

int num; // Declares variable to hold integer data

// Initialize the VISA system

viStatus=viOpenDefaultRM(&defaultRM);

// Open session to GPIB device at address 19

viStatus=viOpen(defaultRM, "GPIB::19::INSTR", VI_NULL, VI_NULL, &vi);

if(viStatus){ // If problems, then prompt user

printf("Could not open ViSession!\n");

printf("Check

instruments

and

connections\n");

printf("\n");

exit(0);}

viPrintf(vi, "*RST\n"); // Resets signal generator

viPrintf(vi, "FREQ:CW?\n"); // Querys the CW frequency

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