Users Manual

PDP User's Guide PDP Collection Software
23
Filter Length (only available if Collection mode = Profile) – the filter applies a
horizontal smoothing filter to the data to reduce variations in the observed data.
The filter length options are an indication of how aggressive the filter is; the larger
the number of traces, the more smoothed the data will be as erratic “jumps” will be
filtered out (Figure 4-3).
If running using the odometer, available filter lengths are 0.5 m, 1.0 m, 5.0m or
OFF.
If running in free-run mode, available filter lengths are 6, 11 or 51 traces or OFF.
While applying a filter does change the saved data, the original data can be
restored in the PDP Toolkit PC software by removing the applied filter.
Measurement Interval (only available if Collection mode = Profile and Trigger
method = Free run) - the measurement interval controls how often a data sample is
collected, for example, one sample every 0.2 seconds. Available options are: 0.1,
0.2, 0.25, 0.5, 1, 2 (in seconds). See Figure 4-5.
Figure 4-5: In Profile, Free-Run mode, the user can select the Filter Length and
Measurement Interval