LeCroy DDA 7 Zi series, Руководство оператора

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Operator's Manual
WP700Zi-OM-E-RevA
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of trend data is a memory, storing new data to memory effectively acts as a trigger and acquisition. Because
updating the screen can take significant processing time, it occurs only once a second, minimizing trigger dead
time (under remote control the display can be turned off to maximize measurement speed).
Parameter Buffer
The parameter buffer allows you to include up to one million values in the trend calculation.
Capture of Parameter Events
The number of events captured per waveform acquisition or display sweep depends on the parameter type.
Acquisitions are initiated by the occurrence of a trigger event. Sweeps are equivalent to the waveform captured
and displayed on an input channel (1, 2, 3, or 4). For non-segmented waveforms, an acquisition is identical to a
sweep. Whereas for segmented waveforms, an acquisition occurs for each segment, and a sweep is equivalent to
acquisitions for all segments. Only the section of a waveform between the parameter cursors is used in the
calculation of parameter values and corresponding trend events.
How to Read Trends
A trend is like any other waveform: its horizontal axis is in units of events, with earlier events in the leftmost part of
the waveform and later events to the right. And its vertical axis is in the same units as the trended parameter.
When the trend is displayed, trace labels appear in their customary place on the screen identifying the trace, the
math function performed, and giving horizontal and vertical information:
x
# number of events per horizontal division
x
Units per vertical division, in units of the parameter being measured
x
Vertical value at point in trend at cursor location when using cursors
x
Number of events in trend that are within unzoomed horizontal display range.
x
Percentage of values lying beyond the unzoomed vertical range when not in cursor measurement mode.
View Modes
The two modes available for AORM, “Parameter” and “List by nT,” both display measurements either as
waveform parameters or as a list of values. The following table indicates which measurements can be made in
each mode.
Measurement Parameter nT Table
BEES x x
BES x x
BESS x x
Dp2c x x
Dp2cs x x
EES x x
EESS x x
EDGSH x x
PAA x x
Pit asym x
Pit base x x
Pit max x x
Pit middle x x
Pit minimum x x