HP 54620A, Руководство пользователя и сервисное руководство

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Triggering the Analyzer
The HP 54620A/C allows you to synchronize the analyzer display to
the actions of the circuit under test by defining a trigger condition.
The analyzer offers three types of triggering, allowing you to match
the complexity of the trigger to that of the data you want to capture.
Trigger types
These trigger types are as follows:
•
Edge trigger
•
Pattern trigger
•
Advanced trigger
Changes to the current trigger specification are handled in real-time. If
the analyzer is stopped when you change a trigger specification, it uses
the new specification as soon as you press
Run/Stop
,
Single
,
or
Autostore
. If the analyzer is in Run mode when you change a
triggering specification, it immediately begins a new acquisition using the
new trigger definition.
Edge Trigger
In edge trigger , you define a single rising or falling edge (or either) that must
be recognized on an input channel to satisfy the trigger condition.
Edge trigger is best when there is a unique waveform edge that defines the
events you wish to capture. For example, a gate signal that defines the
beginning of a pulse train on another channel will often make a good edge
trigger. Edge trigger is less useful when the set of events that occur after the
edge change dramatically after every edge, or when the edges occur very
frequently in relation to other signals.
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