Input Line Debouncers - Basler acA2040-55 User Manual

Physical Interface

5.11.2 Input Line Debouncers

The Line Debouncer feature aids in discriminating between valid and invalid input signals and only
lets valid signals pass to the camera. The parameter value specifies the minimum time that an input
signal must remain high or remain low in order to be considered a valid input signal.
We recommend setting the parameter value so that it is slightly greater than the
longest expected duration of an invalid signal.
Setting the parameter value to a value that is too short will result in accepting
invalid signals. Setting the parameter value to a value that is too long will result in
rejecting valid signals.
Note that the line debouncer delays a valid signal between its arrival at the camera and its transfer.
The duration of the delay will be determined by the debouncer value.
Figure 48 illustrates how the line debouncer filters out invalid input signals, i.e. signals that are
shorter than the parameter value. The diagram also illustrates how the line debouncer delays a valid
signal.
Unfiltered arriving signals
Debouncer
Transferred valid signal
Fig. 48: Filtering of Input Signals by the Line Debouncer
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debouncer
value
delay
AW00123409000
Timing charts are not drawn to scale
Basler ace USB 3.0