Chapter 2 47
Programming Examples
GPIB Programming Examples
700 MHz, a power level of −2.5 dBm, and a deviation of 20 kHz. Before running the program:
• Connect the output of a modulating signal source to the signal generator’s EXT 2 input connector.
• Set the modulation signal source for the desired FM characteristics.
Launch Microsoft Visual C++ 6.0, add the required files, and enter the code into your .cpp source file.
The following program example is available on the PSG Documentation CD-ROM as visaex5.cpp.
//****************************************************************************************
// PROGRAM FILE NAME:visaex5.cpp
//
// PROGRAM DESCRIPTION:This example sets the signal generator FM source to External 2,
// coupling to AC, deviation to 20 kHZ, carrier frequency to 700 MHz and the power level
// to -2.5 dBm. The RF state is set to on.
//
//****************************************************************************************
#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
// Initialize VISA session
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
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