LeCroy Digital Oscilloscopes, Manual

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A push-button control switches from one of these triggers to the
other. Moreover, the LeCroy DSO has a variety of advanced trigger
modes. The functioning of these modes is based on two important
features. The first is the ability to preset the logic state of the trigger
sources: channels CH 1, CH 2, CH 3, CH 4, and EXT and EXT/10.
The second is a counter that can be preset and used to count a
number of events between 1 and 10
9
, or to measure time intervals
from 2.5 ns–20 s in steps of 1 % of the time scale.
In combination, these twin capabilities open the door to a wide variety
of trigger conditions. But great care has been taken to maintain the
SMART Trigger’s ‘user-friendliness’, without losing this versatility.
Icons illustrate the trigger conditions on-screen for every mode.
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The DSO’s display system translates stored data into a graphic
representation of the signal and shows it on the screen. Also
displayed are internal status and measurement results, as well as
operational, measurement and waveform-analysis menus.
The LeCroy DSO’s large screen and a waveform grid that fills the
viewing area accelerate visual processing and facilitate more
effective communication of on-screen information. Other advanced
display techniques give major performance improvements over
conventional analog or digital scopes. A hardcopy of the screen
contents can be produced at the press of a front-panel screen-dump
button. Multiple waveforms can be viewed on separate grids,
ensuring the best utilization of the ADCs’ dynamic range. XY and
variable persistence displays are also provided, as is Enhanced
Resolution Mode.
A wide range of processing functions can be performed. Four traces
— A, B, C and D — are available for zooming exclusively or together
with waveform mathematics. The horizontal expansion can be huge,
greatly improving the time resolution on the viewed trace. Several
traces can be zoomed onto the same waveform for precise timing
measurements.