LeCroy Digital Oscilloscopes, Руководство пользователя

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bandwidth is five times greater than the highest frequency
component of the signal to be studied.
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The higher the sample rate the better the signal resolution. This is
particularly important for single-shot waveform capture and
measurement. The danger with low sample rates is that important
information may be lost between samples. Accurate waveform
capture requires a sample rate of at least five times the highest
frequency component to be captured. For repetitive signals the
sample rate is a less critical factor, as the signal can be captured
over many cycles.
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Acquisition memory length determines the number of input signal
samples that can be stored. The greater the capacity for stored
samples, the faster the possible sample rate for a given waveform
duration. The signal captured with a long-memory DSO has a
greater resolution, while for short-memory DSOs, the high sample
rates quoted are only available at a few fast time-base settings.
Long-memory DSOs allow operation at the highest possible sample
rate, and over a far greater number of timebase settings.
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The DSO can perform the same operations as an analog
oscilloscope and much more:
Capture of one-off (single-shot) events, stored in memory
Data stays on screen while the scope waits for the next trigger
View of the waveform before the instant of triggering, recording an
event’s cause and effect.
Analysis of signals, providing precise measurement results
Documentation of signals, and the transfer of data via storage
media to PC, or direct to print using an internal or external printer,
or to a plotter.