Specifications

To define a pattern trigger
1
Press
Pattern
.
2
For each analog channel (A1 or A2) or digital channel (D0-D15) you
want to include in the desired pattern, press the
Source
softkey to
select the channel, or rotate the Entry knob or the Select knob.
3
Then, press one of these softkeys to set the condition the
oscilloscope will recognize as part of the pattern for that channel:
•
L
for a logic low
•
H
for a logic high
•
X
to ignore this channel
•
Rising or falling edge
Specifying an Edge in a Pattern
You are allowed to specify only one rising or falling edge term in the pattern. If
you define an edge term, then select a different channel in the pattern and
define another edge term, the previous edge definition is changed to a don’t
care.
Source Definitions for Simple Pattern Trigger Affect Advanced Trigger
The source definitions for the simple pattern trigger are shared with the
Pattern 1 and Edge 1 source definitions of the advanced pattern trigger
specification. Thus, changes to the simple pattern trigger will affect that
specification, and changes to Pattern 1 and Edge 1 in the advanced trigger
specification will affect the regular pattern trigger. Defining patterns for the two
trigger types differs. See “To define an advanced pattern trigger.”
Triggering HP 54645A/D Oscilloscopes
To define a pattern trigger
3-17