LeCroy DDA-3000A, Operator'S Manual

Page: 207 / 437

X-Stream Operator’s Manual
WM-OM-E Rev I
205
Resolution Ratio of taa for a high and low
frequency waveform taa (HF)/mean taa (LF)*100 Hysteresis argument
used to discriminate
levels from noise in
data.
Available in DDM2.
Standard in
DDA-5005A.
Ring Ringback (high or low) Available with SDA
parameter.
Rj Effective Amount of random jitter (estimated)
in a signal Available with SDA
parameter.
Rise Rise time: Duration of rising edge
from 10-90%.
Threshold arguments specify two
vertical values on each edge used
to compute rise time.
Formulas for upper and lower
values:
lower = lower thresh. x amp/100 +
base
upper = upper thresh. x amp/100 +
base
Time at lower threshold
minus
Time at upper threshold
averaged over each rising
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.
Rise 20-80% Rise 20% to 80%: Duration of pulse
waveform's rising transition from
20% to 80%, averaged for all rising
transitions between the cursors. Average duration of rising
20-80% 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.
Rise@level Rise at level: Duration of pulse
waveform's rising edges between
transition levels.
Slew rate for % or absolute
levels of rising or falling
edges.
Enhanced version sets
measurement calculations to
use one of the following:
On signals not having
two major levels
(triangle or saw-tooth
waves, for example), top
and base can default to
maximum and
minimum, giving,