Agilent Technologies E1441A user service Initial Operation

Initial Operation

To program the Function Generator using SCPI, you must select the interface address and SCPI commands to be used. Guidelines to select SCPI commands for the Function Generator follow. See the Agilent 75000 Series C Installation and Getting Started Guide for interface addressing.

Note This discussion applies only to SCPI (Standard Commands for Programmable Instruments) programming. The program is written using Agilent VISA function calls. Agilent VISA allows you to execute on VXIplug&play system frameworks that have the VISA I/O layer installed (visa.h include file).

Programming the Example: Perform a Function Generator Self-Test and Read the Result. Function Generator

Programming the Function Generator using Standard Commands for Programmable Instruments (SCPI) requires that you select the controller language (e.g., C, C++, Basic, etc.), interface address and SCPI commands to be used. See the "C-Size Installation and Getting Started Guide" (or equivalent) for interfacing, addressing and controller information.

The following C program verifies communication between the controller, mainframe and Function Generator. It resets the module (*RST), queries the identity of the module (*IDN?) and initiates a self-test of the Function Generator. See the program 1441init.c on the Instrument Drivers CD.

#include <stdio.h> #include <visa.h>

/*** FUNCTION PROTOTYPE ***/

void err_handler (ViSession vi, ViStatus x);

#define DEVICE_ADDRESS "GPIB0::9::10::INSTR" void main(void)

{

char buf[512] = {0};

#if defined(_BORLANDC_) && !defined(_WIN32_) _InitEasyWin();

#endif

ViStatus err;

ViSession defaultRM, funcgen;

/* Open resource manager and Function Generator sessions*/ viOpenDefaultRM (&defaultRM);

viOpen(defaultRM, DEVICE_ADDRESS,VI_NULL, VI_NULL, &funcgen);

/* Set the timeout value to 10 seconds. */ viSetAttribute(funcgen, VI_ATTR_TMO_VALUE, 10000);

Chapter 1 Agilent E1441A Function/Arbitrary Waveform Generator Module Setup 17