LeCroy WavePro 7100A

X-Stream Operator’s Manual
WM-OM-E Rev I 191
Fall time Fall time: Duration of falling edge
from 90-10%.
Threshold arguments specify two
vertical values on each edge used
to compute fall time. Formulas for
upper and lower values:
lower = lower thresh. x amp/100 +
base
upper = upper thresh. x amp/100 +
base
Time at upper threshold
minus
Time at lower threshold
averaged over each falling
edge
On signals not having
two major levels
(triangle or saw-tooth
waves, for example), top
and base can default to
maximum and
minimum, giving,
however, less
predictable results.
Standard parameter.
Fall 80-20% Fall 80-20%: Duration of pulse
waveform's falling transition from
80% to 20%, averaged for all falling
transitions between the cursors.
Average duration of falling
80-20% transition
On signals not having
two major levels
(triangle or saw-tooth
waves, for example), top
and base can default to
maximum and
minimum, giving,
however, less
predictable results.
Standard parameter.
Fall@level Fall at level: Duration of pulse
waveform's falling edges between
user-specified transition levels. See
also Rise@level.
Transition time for % or absolute
levels of all falling edges.
Enhanced version sets
measurement calculations to
use one of the following:
Base & Top (% or absolute)
Peak-Peak (%)
0V-Min (%)
On signals not having
two major levels
(triangle or saw-tooth
waves, for example), top
and base can default to
maximum and
minimum, giving,
however, less
predictable results.
Standard parameter.
Enhanced parameter
available with EMC
option.
First Indicates value of horizontal axis at
left cursor.
Horizontal axis value at left
cursor
Indicates location of left
cursor. Cursors are
interchangeable: for
example, the left cursor
may be moved to the
right of the right cursor
and first will give the
location of the cursor