Technical data

830 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide
34 Status Reporting
• To monitor an event, first clear the event; then, enable the event. All of
the events are cleared when you initialize the instrument.
• To allow a service request (SRQ) interrupt to an external controller,
enable at least one bit in the Status Byte Register (by setting, or
unmasking, the bit in the Service Request Enable register).
The Status Byte Register, the Standard Event Status Register group, and
the Output Queue are defined as the Standard Status Data Structure
Model in IEEE 488.2- 1987.
The bits in the status byte act as summary bits for the data structures
residing behind them. In the case of queues, the summary bit is set if the
queue is not empty. For registers, the summary bit is set if any enabled
bit in the event register is set. The events are enabled with the
corresponding event enable register. Events captured by an event register
remain set until the register is read or cleared. Registers are read with
their associated commands. The *CLS command clears all event registers
and all queues except the output queue. If you send *CLS immediately
after a program message terminator, the output queue is also cleared.
Overload
Event
Register
Overload
Event
Enable
Register
Arm Event
Register
RUN
Bit
Operation
Status
Condition/
Event
Registers
Operation
Status
Enable
Register
(Mask)
Trigger Event
Register
Output
Queue
Standard
Event
Status
Enable
Register
(Mask)
Message
Queue
Standard
Event
Status
Register
Error
Queue
Status
Byte
Register
Service
Request
Enable
Register
Service
Request
Generation
Service
Request (SRQ)
Interrupt
to Computer
(Mask)
Mask Test
Event
Register
Mask Test
Event
Enable
Register