Agilent Technologies E2094S Guia do Utilizador descarregar pdf (Página 128)

128 Agilent VISA User’s Guide

6 Programming via USB

USB Interfaces Overview

USBTMC/USBTMC-USB488 instruments are detected and

automatically configured by Agilent VISA when they are plugged into

the computer. The Agilent IO Libraries Suite Online Help describes the

USB instrument configuration process in more detail.

Due to the complexity of the VISA USB resource string, a VISA alias

(simple name) is assigned to each USB instrument when it is plugged

into the computer. You can use either the alias or the full VISA resource

string when opening a VISA resource, but using the alias is

recommended because it is simpler and because it allows substitution of

USB instruments without the need to change the VISA program.

You can also create VISA aliases for other (non-USB) instruments,

using the Agilent Connection Expert.

NOTE

Do not confuse the Agilent 82357 USB/GPIB Interface with a

USBTMC device. The 82357 is automatically configured as a GPIB

interface, not as a USBTMC device, when it is plugged into the

computer. Only USBTMC/USBTMC-USB488 devices are configured

as USB devices by Agilent VISA.

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Agilent Technologies E2094S Guia do Utilizador Página 128