v2.13 Cleverscope CS300 Reference Manual
©Cleverscope 2004-2018 www.cleverscope.com Page 71
11 Persistence
Persistence is used to add a visual history of how the signal has changed over time. It is very useful for seeing
the limits of signals and plotting eye diagrams.
Cleverscope supports variable persistence on either channel. In addition a reference feature has been added,
which makes it easy to compare a reference waveform to the current waveform.
Cleverscope supports Persistence on the graphing displays for versions 4643 and later.
Each graph has persistence controls for Channel A ( ) and B ( ).
Each graph has independent persistence.
The default state for both controls is Off, which disables the persistence system and
minimizes processor load.
If you choose any item other than
Off
, the persistence system will turn on for both
channels, and the other channel will be set to
Hide
. The persistence system uses
considerable processor resources, so if you are not using it, set a channel to
Off
. Setting
either channel to
Off
turns the other channel off as well.
Persistence Settings
Off
Hide
Show
Clear
Addref
10 Trig
20 trig
50 trig
infinite
The persistence system is turned off, and all persistence information is lost.
Current persistence values for the channel are hidden, but not lost.
Current persistence values are displayed, but not added to by new captures.
Current channel persistence values are cleared.
The current channel plot is added to the persistence plots. You can have up to 50
reference plots per channel. Once added, a reference plot will not be visible until after a
new channel plot is captured, because it lies underneath the current channel plot. A
lighter version of the current channel colour is used.
The 10 most recent persistence plots will be displayed. Once 10 are being displayed, any
additional captured plots will cause the oldest plot to be removed, and the newest plot
added to the persistence display.
The 20 most recent persistence plots will be displayed. Once 20 are being displayed, any
additional captured plots will cause the oldest plot to be removed, and the newest plot
added to the persistence display.
The 50 most recent persistence plots will be displayed. Once 50 are being displayed, any
additional captured plots will cause the oldest plot to be removed, and the newest plot
added to the persistence display.
All captured plots are recorded. The most recent 50 are rendered as individual plots. Plots
51 and older are recorded as a bitmap, which goes behind the graph grid. In this way you
can differentiate between the current plot, the last 50 plots, and older plots.
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