HP 54520 Series - Page 64

Horizontal
Reference Softkey
Reference Softkey
The reference softkey changes the delay reference point to one of three
reference points: left, cntr (center), or right. The time from the trigger
changes with the delay setting, and is displayed below the waveform area at
the left, center, and right of the display. If delay is set to 0 and reference is
set to center, pretrigger data is to the left of the reference point and
posttrigger data is to the right of the reference point.
Center
The data is acquired evenly on both sides of the reference point. The data in
the waveform record is centered around the reference point, and changing
the scale expands or contracts the signal about the reference point.
Left
The data is acquired starting at the reference point, and the data in the
waveform record is all posttrigger data.
Right
The data is acquired before the reference point, and the data in the waveform
record is all pretrigger data.
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