Agilent-technologies U2802A Instrukcja Użytkownika Pobierz pdf (Strona 22)

1Getting Started

12 Agilent U2802A 31-Channel Thermocouple Input User’s Guide

IVI-COM Drivers

The Agilent IVI- COM drivers simplify instrument control when you are

working in a COM- compatible environment. IVI- COM allows you to

programmatically control your instrumentation and make measurements

while providing a greater degree of instrument interchangeability and code

reuse. The Agilent IVI- COM drivers support the use of IntelliSense for

even greater ease- of- use within a Microsoft development environment.

The Agilent IVI- COM driver supports all Agilent Series DAQs. The Agilent

Firmware Revision: A.2006.10.10 is the minimum revision required for full

driver functionality.

An IVI- COM driver can program a particular set of instrument models. It

implements an instrument- specific interface tuned to the capabilities of

those models. The driver may also implement an IVI class- compliant

interface which implements a limited set of functionality common to all

instruments of the class. Instrument class- compliant interfaces are defined

by the IVI Foundation. The application writer must choose whether to use

the instrument- specific interface or the class- compliant interface.

The IVI inherent capabilities, through the IIviDriver interface, are available

in both the instrument- specific interface and class- compliant interface.

The general programming techniques are also the same.

Choosing Instrument-Specific Interface

With this interface, you have the benefit of full access to the instrument's

capabilities. All capabilities in the class- compliant interface are also

covered by the instrument- specific interface, but you will find some

capabilities in the instrument- specific interface that are not available

through the class- compliant interface. You may also see some performance

enhancements, as the driver can be tuned to use efficient programming

methods for that particular instrument.

Choosing Class-Compliant Interface

By limiting your program to the class- compliant interface, you have the

potential advantage of syntactic interchangeability. Hence, another

IVI- COM driver (and instrument) which supports the same class could be

substituted for the original driver, if the prior IVI- COM driver supports all

the capability groups used in the original driver. In this case, the

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Agilent-technologies U2802A Instrukcja Użytkownika Strona 22