Teledyne LeCroy WaveRunner XI SERIES Operator’s Manual - Manual (Page 112)

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AVE
R
UNNER
X
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S
ERIES
Parameter Description Definition Notes
Base Lower of two most probable states
(higher is top). Measures lower level in Value of most
probable lower state On signals not having two major
levels (triangle or saw-tooth
two-level signals. Differs from min in
that noise, overshoot, undershoot, and
ringing do not affect measurement. waves, for example), returns same
value as min.
Standard parameter.
Cycles Determines number of cycles of a
periodic wave Number of cycles of Standard parameter.
form lying between
Transition may be positive- or
negative-going.
periodic waveform
cursors. First cycle begins at first
transition after the left cursor.
cyclic
Mean
s the average
of waveform data. Contrary to mean,
computes average over an integral
liminating bias
l intervals.
Average of data
values of an integral
numb r of periods Choose this parameter by
selecting
Mean from the
parameter table, then touching the
Cyclic checkbox.
Standard parameter.
Cyclic mean: Compute
number of cycles, e
caused by fractiona
e
cyclic
Median
Cyclic median: Computes average of
base and top values over an integral Data value for which
50% of values are Choose this parameter by
selecting
Median from the
r table, then touching the
ter.
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WRXi-OM-E Rev C
number of cycles, contrary to median,
eliminating bias caused by fractional
intervals. above and 50%
below paramete
Cyclic checkbox.
Standard parame
cyclic Cyclic root mean
RMS
square root of sum of squares of data
values divided by number of points.
Contrary to rms, calculation is
square: Computes
performed over an integral number of
cycles, eliminating bias caused by
fractional intervals.
Where: v
i
denotes measured
mber of
Standard parameter.
sample values, and N = nu
data points within the periods
found.
Choose this parameter by
selecting
RMS from the parameter
table, then touching the Cyclic
checkbox.
cyclic
Std dev
Cyclic standard deviation: Standard
deviation of data values from mean
value over integral number of periods.
Contrary to sdev, calculation is
performed over an integral number of
cycles, eliminating bias caused by
fractional intervals. Where: v
i
denotes measured
sample values, and N = number of
data points within the periods
found.
Choose this parameter by
selecting
Std dev from the
parameter table, then touching the
Cyclic checkbox.
Standard parameter.
Delay Time from trigger to transition:
Measures time between trigger and
first 50% crossing after left cursor.
Can measure propagation delay
between two signals by triggering on
one and determining delay of other. Time between
trigger and first 50%
crossing after left
cursor Standard parameter.