LeCroy 6000 SERIES, Руководство оператора, Страница: 338 / 409

Operator's Manual
336
ISSUED: October 2003 WR6K-OM-E Rev A
Function Options How It Works
Ptrace Mean Clear Sweeps For each vertical time slice on the
persistence map, Ptrace Mean calculates
and plots a trace corresponding to the
map’s mean value. Single-shot signals
sampled at or above 2 GS/s and
accumulated in the persistence map can be
traced at a resolution of 10 ps (100 GS/s
equivalent sampling). The persistence trace
average can be further analyzed using the
instrument’s standard parameters, such as
rise time.
Ptrace Range Clear Sweeps, % population
range. A percentage of the
population of the persistence map
can be chosen from which the
envelope will be formed, enabling
exclusion of infrequent events
(artifacts).
For each vertical time slice on the
persistence map, Ptrace Range calculates
and plots an envelope corresponding to the
map’s range. The range can then be used
in further processing: for example, as a
source for Pass/Fail masks.
Ptrace Sigma Clear Sweeps, Scale to standard
deviations. This allows you to select
a sigma from 0.5 to 10.0, which
expands those parts of the sigma
envelope representing waveform
regions with the most jitter. This is
useful for making a tolerance mask.
For each vertical time slice on the
persistence map, Ptrace Sigma calculates
and plots an envelope corresponding to the
map’s standard deviation. Multiples of
sigma can also be done using sigma.
The sigma can be used in further
processing; for example, as a source for
Pass/Fail masks.