LeCroy SDA - Page 172

Parameter Description Definition Notes
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:
Base & Top (% or
absolute)
Peak-Peak (%)
0V-Max (%)
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.
RMS Root Mean Square of data
between the cursors - about same
as sdev for a zero-mean waveform.
Where: v
i
denotes
measured sample
values, and N =
number of data points
within the periods
found up to maximum
of 100 periods.
Gives similar result when
applied to time domain
waveform or histogram of data
of same waveform. But with
histograms, result may include
contributions from more than
one acquisition.
Standard parameter.
SAS Signal Amplitude Symmetry of a
100Base-T signal
Available with ENET option.
SD2Skew Calculates the time skew between
2 serial data lanes
Available with SDA and PCIE
options.
Setup Time from the data edge to the
clock edge.
Reference levels and edge-
transition polarity can be
selected. Hysteresis argument
used to discriminate levels
from noise in data.
Available with JTA2 and
XMAP options.
Standard in SDA and
SDA100G scopes.
172 SDA-OM-E Rev H