Measurement-computing Analyzer488 Manuel d'utilisateur télécharger pdf (Page 136)

Section 4 Serial Controller

4.42

LISTEN

The

LISTEN

command sets the Analyzer488 to the Listen State when in the

Low Level Controller Mode (

CONTROLLER OFF

). Once the

LISTEN

command has

been executed, the

READ

command may be used to accept data from the bus, one

event at a time.

The query option,

LISTEN?

, returns the current Listen or Talk State of the

Analyzer488.

LISTEN

is returned if it is functioning in the Listen State,

TALK

returned if functioning in the Talk State.

TYPE Low Level Controller command

SYNTAX LISTEN[?]

RESPONSE None

MODE Low Level Controller

BUS STATES Dependent on data sent from active talker

QUERY

LISTEN

if in Listen State,

TALK

if in Talk State.

RESPONSE

EXAMPLES PRINT#1,"CONTROLLER OFF"

PRINT#1,"ASSERT IFC ATN REN"

PRINT#1,"UNASSERT IFC"

PRINT#1,"TALK"

PRINT#1,"HANDSHAKE STEP"

PRINT#1,"WRITE &H54"

PRINT#1,"UNASSERT ATN"

PRINT#1,"LISTEN"

PRINT#1,"READ"

INPUT#1,A$;PRINT A$

...

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Measurement-computing Analyzer488 Manuel d'utilisateur Page 136

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