Measurement-computing Serial488A Manual de usuario descargar pdf (Pagina 58)

4.9

4.6.7 Unlisten

(UNL)

UNL places the

Serial488A

in the Listener Idle State.

4.6.8 Untalk

(UNT)

UNT places the

Serial488A

in the Talker Idle State.

4.7 IEEE Address Selection

SW3-1 through SW3-5 select the IEEE bus address of the

Serial488A

when in

the

IEEE

Peripheral

mode. The address is selected by simple binary weighting with

SW3-1 being the least significant bit and SW3-5 the most significant. The following

figure shows the IEEE address of the

Serial488A

set to 10.

SW3 View for IEEE Address Selection

OPEN

12345678

DOT

Switch

Side

View

0 x 16

1 x 8

0 x 4

1 x 2

0 x 1

= 0

= 8

= 0

= 2

= 0

IEEE Address = 10

4.7.1 Listen Only Mode

Listen Only

is a special type of

Peripheral

operation. In the

Listen

Only

mode the

Serial488A

accepts all data transmitted on the bus and

transfers it out its serial port. The

Serial488A

is set to

Listen

Only

mode

by setting its address to 31 (switches SW3-1 through SW3-5 all open).

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