Measurement-computing Serial488A Uživatelský manuál stáhnout pdf (Strana 57)

4.8

When the

Serial488A

is addressed to listen, it accepts data from the

active talker and outputs this data through the serial interface. It substitutes

the selected serial terminators for the received IEEE bus terminators.

4.6.3 Device Clear

(DCL and SDC)

Device Clear resets the

Serial488A

's IEEE input and serial input

buffers. Any pending data and Service Requests (

SRQ

), including the

information they convey, are lost.

4.6.4 Interface Clear

(IFC)

IFC places the

Serial488A

in the Talker/Listener Idle State. It clears

any pending requests for service (SRQ). The condition which caused the

SRQ remains unmodified.

4.6.5 Serial Poll Enable

(SPE)

When Serial Poll Enabled, the

Serial488A

sets itself to respond to a

serial poll with its serial poll status byte if addressed to talk. When the

serial poll byte is accepted by the controller, any pending

SRQ

s are

cleared. The

Serial488A

will continue to try to output its serial poll

response until it is 'Serial Poll Disabled' by the controller.

4.6.6 Serial Poll Disable

(SPD)

Disables the

Serial488A

from responding to serial polls by the

controller.

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Measurement-computing Serial488A Uživatelský manuál Strana 57