Agilent Technologies 8935 Series Manual do Utilizador descarregar pdf (Página 25)

Chapter 1 25

Using HP-IB

Overview of the Test Set

Differences Between the Test Set’s IBASIC Controller and

Other Single-Tasking Controllers

The IBASIC controller is unlike other single tasking instrumentation

controllers in several ways. First, it does not have a keyboard. This

imposes some limitations on creating and editing IBASIC programs

directly on the Test Set. In Internal Automatic Control mode a “virtual”

keyboard is available in firmware which allows the operator to enter

alphanumeric data into a dedicated input field using the rotary knob.

This is not the recommended programming mode for the IBASIC

controller. This feature is provided to allow user access to IBASIC

programs for short edits or troubleshooting. Several programming

modes for developing IBASIC programs to run on the internal IBASIC

controller are discussed in this manual.

Secondly, the IBASIC controller has a dedicated HP-IB interface, select

code 8 in Figure 1-2 on page 29, for communicating with the internal

instruments of the Test Set. This HP-IB interface is only available to

the IBASIC controller. There is no external connector for this HP-IB

interface. No external instruments may be added to this HP-IB

interface. The HP-IB interface, select code 7 in Figure 1-2, is used to

interface the Test Set to external instruments or to an external

controller. The dedicated HP-IB interface at select code 8 conforms to

the IEEE 488.2 Standard in all respects but one. The difference being

that each instrument on the bus does not have a unique address. The

Instrument Control Hardware determines which instrument is being

addressed through the command syntax. Refer to the HP-IB Syntax

Reference Guide for a listing of the HP-IB command syntax for the Test

Set.

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Agilent Technologies 8935 Series Manual do Utilizador Página 25