CBLé System Guidebook 45
Record Time (Continued)
The absolute record time for the first sample is zero for manual triggered
nonprestore samples. It is approximately equal to the sample time for
most other conditions. If an external clock is used, it will be the time
between the
CMD3
(Sample and Trigger) and the first external clock.
The resolution for Record Time is shown by the table below.
Clock Condition Record Time Resolution
Sample Time 0.2 sec
Sample Time ‚ 0.25 sec
External Clock < 0.1289 sec
External Clock > 0.1289 sec
3.2 msec
3.906 msec
3.2 msec
3.906 msec
Filter
This parameter lets you select one of six numeric filtering algorithms to
remove noise from collected data and derivatives. 1 to 4 selects among
Savitzky-Golay fourth-order filters with varying numbers of points. 5 and
6 select median pruning filters designed to remove outlying values.
(Default:
0
)
0
1–6
Selects no noise filtering
Selects one of six filtering algorithms:
1 5-point Savitzky-Golay (S-G) smoothing (applies only to
derivatives)
2 9-point (S-G) smoothing
3 17-point (S-G) smoothing
4 29-point (S-G) smoothing
5 3-point median pruning filter
6 5-point median pruning filter
Collected data before and after the range of data that is filtered is
assumed to be equal to the first and last data point, respectively. This
“end effect” affects the filtered data at the beginning and end of the data
range for (n-1)à2 points, where n is the number of points in the filter.
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