How To Specify Events And Reactions To Events; Before You Start Using Events - HP 81200 User Manual

Creating the Stream of Generated and Expected Data
146
How to Specify Events and
Reactions to Events
The HP 81200 system is capable of reacting to events. The reaction can
simply be a trigger pulse at the TRIGGER OUTPUT of the clock module,
but also a change of the test sequence.
For general information see "Event Handling Principles" on page 45.
Events can be defined at any time. The reactions to events can be specified
if the Sequence Editor or the Data/Sequence Editor is active.
Examples can be found under "How Do I Use Events?" on page 222.

Before You Start Using Events

You can define up to 5 events for immediate action and 5 events for
deferred action.
Events for immediate action are serviced as soon as they occur.
Events for deferred action are serviced at the end of the block. This is in
contrast to a trigger associated with a block or loop. Those actions occur
when the execution of the block is started. Events for deferred action are
prioritized. The highest event number has the highest priority.
What You Need to Find Out Before Using Events
1 Determine what you wish to achieve. Choices are:
– Issue a trigger pulse for starting/synchronizing an external
instrument.
– Set the VXI trigger lines T0/T1 for triggering other VXI modules.
– Change the test sequence: Continue with another block, start all over,
or terminate the test.
If you wish to switch to another block, ensure that it is included in the
overall sequence and labeled. You can only jump to labeled blocks.
2 Determine the release mechanism. Remember that a system equipped
with the HP E4831A clock module has limited event recognition
capabilities. Otherwise the choices are:
– A local or remote command.
– One or several bit combinations of the trigger pod (see also "Trigger
Pod" on page 22).
– The states of the VXI trigger lines TX0 and TX1 for reacting to the
trigger of another VXI module.
HP 81200 Data Generator/Analyzer Platform User Guide, Revision 2.1

How to Specify Events and Reactions to Events