Intermodule Measurement Problems; An Event Wasn't Captured By One Of The Modules - HP E2465A PowerPC 604 PGA User Manual

Intermodule Measurement Problems
Some problems occur only when you are trying to make a
measurement involving multiple modules.
An event wasn't captured by one of the modules
If you are trying to capture an event that occurs very shortly after the event
that arms one of the measurement modules, it may be missed due to internal
analyzer delays. For example, suppose you set the oscilloscope to trigger
upon receiving a trigger signai from the logic analyzer because you are trying
to capture a pulse that occurs right after the analyzer's trigger state. If the
pulse occurs too soon after the analyzer's trigger state, the oscilloscope will
miss the pulse.
D Adjust the skew in the Intermodule menu.
You may be able to specify a skew value that enables the event to be
captured.
D Change the trigger specification for modules upstream of the one with
the problem.
If you are using a logic analyzer to trigger the scope, try specifying a trigger
state one state before the one you are using. This may be more difficult than
working with the skew because the prior state may occur more often and not
always be related to the event you are trying to capture with the oscilloscope.
A-10 E2465A PowerPC 604 PGA Preprocessor Interface