Teledyne LeCroy STX M6-1 SAS_SATA Protocol Analyzer User Manual - Manual (Page 321)

Sierra M6‐4 SAS/SATA Protocol Analyzer User Manual 319
InFusion Scenarios LeCroy Corporation
Sequences
The Global Rules are all you need for simple test scenarios. However, a scenario also can
contain one or two sequences, which can define multiple states and allow branching
between states. With a sequence, you also can do looping, which allows you to repeat a
test state or to execute a test for a specified period of time.
As with Global Rules, the menu‐driven interface guides you in building a sequence. Some
of the prompts are different, however, because you now are encapsulating groups of
events and actions as distinct states. Recall that a state is a combination of events and
actions at a specific point in time. If the event or combined event defined by a state
occurs, the corresponding action or set of actions follows.
Figure 4.13: Global Rules and Sequence Areas of a Scenario
InFusion hardware provides the capacity to have up to two sequences co‐existing in a
scenario in addition to the Global Rules. Recall that both the Global Rules and any
sequences are active at all times. Each is a separate “state machine,” having the behavior
of a particular test state at any point in time. Because the Global Rules has the capacity
for only one state, you can view it as a “degenerative state machine.”