LeCroy SDA User Manual

SDA Operator’s Manual
Parameter Description Definition Notes
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.
DCD Amount of jitter due to duty cycle
distortion
Available with SDA and ENET
options.
Standard in SDA and
WaveExpert scopes.
DDj Amount of data dependent jitter in
a signal
Available with SDA option.
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.
Delta delay delay: Computes time between
50% level of two sources.
Time between
midpoint transition of
two sources
Standard parameter.
Dj Effective Amount of deterministic jitter
(estimated) in a signal
Available with SDA option.
DOV Differential Output Voltage of a
100Base-T signal
Available with ENET option.
Dperiod@level Adjacent cycle deviation (cycle-to-
cycle jitter) of each cycle in a
waveform
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 SDA100G scopes.
Droop FG 1000Base-T test mode 1 droop
from F to G
Available with ENET option.
Droop HJ 1000Base-T test mode 1 droop
from H to J
Available with ENET option.
SDA-OM-E Rev H 157

LeCroy SDA Specifications

General

Brand	LeCroy
Model	SDA
Category	Measuring Instruments
Language	English