HP 54750A, User Manual, Page: 342 / 478

The General Function Menus
Display Menu
A minimum persistence setting is used when the input signal is changing
and you need immediate feedback. F or example , if you are rapidly probing
from point to point, or you are setting the amplitude or frequency of a signal
source , you may nd that more persistence is useful for observing long-term
changes in a signal or observing signals with low repetition rates .
Because all of the data points acquired from a specic trigger event are
displayed at the same intensity , the gray scaling feature provides the
following benets:
V arious points on the display can be associated to determine which points
make up individual waveforms .
The relative ages of waveforms can be determined.
The direction in which a waveform is changing can be determined.
The value of a waveform inside a waveform envelope can be determined.
K ey Path 4 Displa y 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Persistence
NNNNNNNNNNNNNNNNNNNNNNNNNN
variable
NNNNNNNNNNNNNNNNNNNNNNNNNN
infinite Y ou can use innite persistence for worst-case characterization of signal noise ,
jitter , drift, and timing. When you select innite persistence , all the data
points are kept on the display until:
4 Clear displa y 5 is pressed
4 Autoscale 5 is pressed
the vertical or horizontal settings are changed
the trigger settings are changed
the instrument is turned o
K ey Path 4 Displa y 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Persistence
NNNNNNNNNNNNNNNNNNNNNNNNNN
infinite
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