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Several traces can be zoomed from a single waveform to
obtain precise timing measurements.
For instance, on a waveform composed of two pulses separated
by a long delay, Trace A could be made a zoom of the first pulse,
and Trace B a zoom of the second.
The combination of long memory and zooming allows extremely
accurate time interval measurements. And the time resolution on
the viewed trace can be significantly improved.
For example, choosing 50 000 points per channel on a timebase
of 0.1 ms/div, traces can be expanded to as much as 50 ns/div
-- a factor of 2000. Using Relative Time cursors (see Chapter
14), a delay of, say, 500