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

Programming Examples

GPIB Programming Interface Examples

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Saving and Recalling States Using VISA and C

In this example, instrument settings are saved in the signal generator’s save register. These settings

can then be recalled separately; either from the keyboard or from the signal generator’s front panel.

Launch Microsoft Visual C++ 6.0, add the required files, and enter the following code into your .cpp

source file. visaex8.cpp performs the following functions:

•error checking

• clears the signal generator

• resets the status byte register

• resets the signal generator

• sets up the signal generator frequency, ALC off, power level, RF output on

• checks for operation complete

• saves to settings to instrument register number one

• recalls information from register number one

• prompts user input to put instrument into Local and checks for operation complete

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

visaex8.cpp.

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

// PROGRAM FILE NAME:visaex8.cpp

// PROGRAM DESCRIPTION:In this example, instrument settings are saved in the signal

// generator's registers and then recalled.

// Instrument settings can be recalled from the keyboard or, when the signal generator

// is put into Local control, from the front panel.

// This program will initialize the signal generator for an instrument state, store the

// state to register #1. An *RST command will reset the signal generator and a *RCL

// command will return it to the stored state. Following this remote operation the user

// will be instructed to place the signal generator in Local mode.

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

#include <visa.h>

#include "StdAfx.h"

#include <iostream>

#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

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