Kollmorgen AKD PDMM series, User Manual

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AKD PDMM User Guide | 13.2.2.5 Effects of Recorder Gap
When the trigger slope is negative, the trigger value will trigger when:
l
The trigger source is greater than the trigger value in the previous recording sample.
l
The trigger source is less than or equal to the trigger value in the current recording sample.
13.2.2.5 Effects of Recorder Gap
When the recording rate is less than16,000 Hz (REC.GAP > 1), there can be some impact on the trig-
gering of the recorder. When using pretriggering and a recording rate of less than 16,000 Hz, the trigger
only evaluates every N samples, where N is the value of REC.GAP. Two effects result from this con-
dition:
1. You cannot be sure of the moment that the recorder is triggered any closer than N samples. An exam-
ple of this is shown below where the trigger value is set to 3, the trigger slope is positive and the
recorder gap is 2. Both examples are the same data, but one instance collected and triggered on the
odd data. The other example collected and triggered on the even data.
108 Kollmorgen™ | December 2012