Teledyne LeCroy HDO6000 Operators Manual - Manual (Page 59)

Operator's Manual
C OLOR M ODE
Color mode persistence works on the same principle as Analog persistence, but instead uses the entire
color spectrum to map signal intensity: violet for minimum population, red for maximum population. In
this mode, all traces use all colors, which is helpful for comparing amplitudes by seeking like colors
among the traces.
3 D M ODE
3d persistence creates a topographical view of your waveform from a selection of shadings, textures, and
hues. The advantage of the topographical view is that areas of highest and lowest intensity are shown as
peaks and valleys, in addition to color or brightness. The shape of the peaks (pointed or flat) can reveal
further information about the frequency of occurrences in your waveform.
In this mode, you can also turn the X and Y axes of the waveform through 180° of rotation from -90° to
+90°.
In the solid view of color-graded persistence, saturation is set at 50%, with red
areas indicating highest intensity. The X-axis has been rotated 60%; the Y-axis
has been rotated 15%.
In the monochrome (analog) view, the lightest areas indicate highest intensity,
corresponding to the red areas in the solid view.
The shaded (projected light) view emphasizes the shape of the pulses.
In the wire frame view, lines of equal intensity are used to construct the
persistence map.
Saturation Level
Besides the different modes, you can select a saturation level as a percentage of the maximum
population. All populations above the saturation population are then assigned the highest color intensity:
that is, they are saturated. At the same time, all populations below the saturation level are assigned the
remaining intensities. Data populations are dynamically updated as data from new acquisitions is
accumulated.
A saturation level of 100% spreads the intensity variation across the entire distribution; at lower
saturation levels the intensity will saturate (become brighter) at the percentage value specified. Lowering
this percentage causes the pixels to be saturated at a lower population and makes visible those events
rarely seen at higher saturation levels.
Persistence Time
Persistence time is, quite simply, the duration of time (in seconds) after which persistence data is erased
from the display.
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