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80 Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide
Programming Examples
GPIB Programming Interface Examples
Launch Microsoft Visual C++ 6.0, add the required files, and enter the code into your .cpp source file.
visaex5.cpp performs the following functions:
•error checking
• resets the signal generator
• sets up the EXT 2 connector on the signal generator for FM
• sets up FM path 2 coupling to AC
• sets up FM path 2 deviation to 20 kHz
• sets carrier frequency to 700 MHz
• sets the power level to -2.5 dBm
• turns on frequency modulation and RF output
The following program example is available on the signal generator 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
printf("Could not open ViSession!\n");
printf("Check instruments and connections\n");
printf("\n");
exit(0);}