Chapter 2 49
Programming Examples
GPIB Programming Examples
Generating an Internal AC-Coupled FM Signal Using VISA and C
In this example the VISA library is used to generate an ac-coupled internal FM signal at a carrier frequency
of 900 MHz and a power level of −15 dBm. The FM rate will be 5 kHz and the peak deviation will be 100
kHz. Launch Microsoft Visual C++ 6.0, add the required files, and enter the following code into your .cpp
source file.
The following program example is available on the PSG Documentation CD-ROM as visaex6.cpp.
//****************************************************************************************
// PROGRAM FILE NAME:visaex6.cpp
//
// PROGRAM DESCRIPION:This example generates an AC-coupled internal FM signal at a 900
// MHz carrier frequency and a power level of -15 dBm. The FM rate is 5 kHz and the peak
// deviation 100 kHz
//
//****************************************************************************************
#include <visa.h>
#include "StdAfx.h"
#include <iostream>
#include <stdlib.h>
#include <conio.h>
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
viStatus=viOpenDefaultRM(&defaultRM); // Initialize VISA session
// 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
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