LeCroy SDA, Operator'S Manual

Page: 174 / 397

Parameter Description Definition Notes
TAA- Average local baseline-to-trough
amplitude for all local features. Hysteresis argument used to
discriminate levels from noise
in data.
Available with DDM2 option.
Standard in DDA-5005A.
TAA+ Average local baseline-to-peak
amplitude for all local features. Hysteresis argument used to
discriminate levels from noise
in data.
Available with DDM2 option.
Standard in DDA-5005A.
TIE@level Difference between the measured
times of crossing a given slope and
level and the ideal expected time.
For Slope you can choose positive,
negative, or both. For output units
you can choose time or unit interval
(UI). A unit interval equals one
clock period.
The Virtual Clock setup gives you a
choice of Standard (1.544 MHz) or
Custom reference clocks.
You can also use a mathematically
derived Golden PLL to filter low
frequency jitter. The cutoff
frequency is user selectable. Cutoff Freq =
(1/1.667e3) x Clock
Freq Reference levels and edge-
transition polarity can be
selected. Hysteresis argument
used to discriminate levels
from noise in data.
Available with JTA2, ENET,
SDA, and XMAP options.
Standard in SDA100G,
WavePro 7000A, WaveExpert,
and sampling scopes.
Time@edge Measures time at each edge on
each digital line Available with MS-32 option.
Time@level Time at level: Time from trigger
(t=0) to crossing at a specified
level. Time from trigger to
crossing level Reference levels and edge-
transition polarity can be
selected. Hysteresis argument
used to discriminate levels
from noise in data.
Standard parameter.
Top Higher of two most probable states,
the lower being base; it is
characteristic of rectangular
waveforms and represents the
higher most probable state
determined from the statistical
distribution of data point values in
the waveform. Value of most
probable higher state 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.
Total Jitter Total jitter at a given bit error rate Available with ENET and SDA
options.
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