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Using Service Request (SRQ) Interrupts
The Test Set provides many status bits which can be read directly or used to
generate SRQ interrupts. For example, the following status indicators have status
bits (in addition to front panel annunciators):
•
•
•
•
•
•
•
SRQ interrupts require more program code than requesting status at different time
intervals (polling), but interrupts have the advantage of allowing the Call
Processing Subsystem to operate at its maximum speed since processes within the
subsystem are not constantly interrupted by commands on the GPIB.
See "Status Register Programming Considerations" in the Status Reporting
chapter of the E8285A User's Guide.
If your computer system or programming language does not support the SRQ
feature of the GPIB, polling will be required.
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Transmitting
Registered
Page Sent
Access Probe
Connected
Softer Handoff
Hard Handoff
Chapter 4, Status Reporting
Using Service Request (SRQ) Interrupts
217
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