LeCroy SDA - Page 171

SDA Operator’s Manual
Parameter Description Definition Notes
PW50+ Average pulse width at the 50%
point between the local baseline
and the local peak.
Hysteresis argument used to
discriminate levels from noise
in data.
Available with DDM2 option.
Standard in DDA-5005A.
Real Power Mean of the product of voltage and
current waveform (or mean of the
instantaneous power)
Available with PMA2 option.
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.
SDA-OM-E Rev H 171