Bedienungsanleitung Keithley 2001 (Seite 27 von 476) (Englisch)

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Getting Started

2001-900-01 Rev. K/ August 2010 2-13

4. The next message sets the number of burst readings to

store:

BURST: 00100 READINGS

Use , , , , ENTER,EXIT, or INFO

5. Use the cursor and RANGE  and  keys to change

the buffer size. Then press ENTER for the change to

take effect:

00100 READING BURST

Use TRIG to start; EXIT to abort

Step 5



Acquire the burst readings

Initiate burst mode by pressing the TRIG key.

The ARM annunciator comes on when the raw readings are

being acquired. The asterisk annunciator comes on when the

readings are being post-processed. Both indicators go out

when post-processing is complete.

Step 6



Recall the burst readings

1. Examine the contents of the buffer by pressing

RECALL:

+00.000 VDC

Rdg#+00000

2. Press the EXIT key once to leave the buffer contents

display. Press it a second time to disable the burst mode.

2.6 IEEE-488.2 and SCPI basics

The following paragraphs discuss fundamental information

concerning operation over the IEEE-488 bus. Detailed

information on operating the instrument over the bus is

contained in Section 4 of this manual.

2.6.1 SCPI overview

IEEE-488.2 defines a syntax and protocol for sending data to

and from instruments. It also defines a set of common

commands that are used to perform basic operations, such as

reading status registers, providing triggers, and resetting the

instrument to default conditions.

SCPI (Standard Commands for Programmable Instruments)

defines a standard set of commands (and format) to control

every aspect of instrument operation. Together, IEEE-488.2

and SCPI create a command structure for all programmable

instruments.

2.6.2 Compatibility

An instrument that uses the IEEE-488.2 standard and SCPI

does not have any special hardware requirements. The IEEE-

488 interface that you used with the old standard (IEEE-

488.1) will work with the new standard. Simply connect the

Model 2001 to a computer that is equipped with an IEEE-

488 interface.

The term GPIB (General Purpose

Interface Bus) is used in this manual and

in the menu structure of the instrument.

GPIB is simply another term for the IEEE-

488 bus.

2.6.3 Bus connection

Before using the instrument over the bus, you must connect

the IEEE-488 connector on the rear panel of the instrument

to the IEEE-488 connector of your controller. Use a Keithley

Model 7007 or similar IEEE-488 cable for this connection.

2.6.4 Primary address

The primary address of the Model 2001 must agree with the

primary address you intend to specify in the controller’s

programming language. The factory setting for the primary

address is 16, so if you intend to use that address, you need

not change it. However, the primary address can be set to any

value between 0 and 30 by using the GPIB setup menu

(ADDRESSABLE selection) available with the MENU key.

2.6.5 Abbreviated common command summary

Table 2-6 provides an abbreviated list of common commands

that are defined by the IEEE-488.2 standard. These are the

common commands that are most used for bus operation.

Note that each common command is preceded by an asterisk

(*).

2.6.6 Abbreviated SCPI command summary

Most instrument operations are controlled using SCPI

commands. Table 2-7 provides an abbreviated list of the

SCPI commands necessary to perform some basic

operations.

Not shown in the table are companion query commands for

the :ARM and :TRIGger subsystem commands (:COUNt?,

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