Enabling the IEEE-488 Interface, Capability

2620A, 2625A

Users Manual

Capability

SH1 and AH1 T5

Table 4-2. IEEE-488.1 Capabilities

Description

Read and write bus handshaking, including hold off.

Basic talker with serial poll and without talk only mode. Serial poll is used to return the instrument status byte to the controller.

TE0

No extended talker.

Basic listener without listen only mode. Listen only mode is only useful for an IEEE-488 device like a printer.

LE0

SR1

No extended listener.

Service request interface; allows SRQs (service requests). The SRQ function allows the instrument to notify the controller when an operation is complete.

RL1

Remote local capability with local lock out. Usually the instrument front panel will not be operational while the instrument is in use by the IEEE-488 interface. Remote local capability enables the front panel. Local lock out disables the front panel.

PP0

DC1

No parallel poll capability. Parallel poll is rarely used in the industry. It was intended as a fast way to get a status bit from several devices, but failed in gaining acceptance.

Device clear capability. This allows the instrument to be initialized to a known state. The IEEE-488.2 standard describes exactly what this known state is.

Not a controller.

Open Collector Outputs

Enabling the IEEE-488 Interface

The IEEE-488 interface can be enabled only from the front panel, using the following procedure. This procedure is also summarized in Table 4-3.

Press these buttons:

To select from these choices:

COMM

(K L)

Table 4-3. IEEE-488 Setup

BaudAddress

G		G
	E
D		D
IEEE
IEEE		0
300		1
600		∙
1200		∙
2400		30
4800
9600

1.Select COMM (KL).

The left display shows "IEEE" or an RS-232 baud rate, and "bAUd" appears in the right display. Proceed with the following steps.

If "IEEE" is shown in the left display, the IEEE-488 interface is already enabled.

4-12

2625A, 2620A specifications

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Fluke 2625A Enabling the IEEE-488 Interface, Capability, IEEE-488.1 Capabilities Description

Models: 2625A 2620A