Agilent Technologies 8935 Series Manual de usuario Pagina 167

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Chapter 6 167
Advanced Operations
HP-IB Service Requests
HP-IB Service Requests
The Test Set is capable of generating a “service request” when it
requires the Active Controller to take action. Service requests are
generally made after the Test Set has completed a task (such as making
a measurement) or when an error condition exists (such as an internal
self-calibration has failed).
The mechanism by which the Active Controller detects these requests is
the SRQ interrupt. Interrupts allow for efficient use of system
resources, because the Active Controller may be executing a program
until an SRQ interrupt occurs. If SRQ interrupts are enabled in the
Active Controller, the occurrence of an interrupt can initiate a program
branch to a routine which “services” the interrupt (executes some
remedial action). The operating and/or programming manuals for each
controller describe the controller’s capability to set up and respond to
SRQ interrupts.
This section describes the steps necessary to properly configure the Test
Set to request service using the Service Request (SRQ) function.
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