Reference - HP 54710A User's Reference Manual

Time Base Menu

Reference

Reference
Reference places the reference point to the left, center, or right side of the
display. The position value is the time of the reference point relative to the
trigger event. For example, a position setting of −50 ns indicates that the
trigger event occurs 50 ns after the time base reference point.
Center reference 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 reference The data is acquired starting at the reference point, and
the data in the waveform record is all postreference.
Right reference The data is acquired ending at the reference point,
and the data in the waveform record is all prereference.
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