Engine – Pickups – Inputs
Figure: Engine – Pickups – Inputs
Type
You can select the type of events that will occur on this input for each pickup input. Type and number of events are defined by the discs or ring gears used. If you decide not to use a pickup input, select the entry None from the list. The following types can be set:
- N+1
Disc of type N with one additional event, e.g. a disc with 6 teeth and one additional tooth for the index signal (N=6). - N+1 Extended Index Range
Disc of type N with one additional event, e.g. a disc with 6 teeth and one additional tooth for the index signal (N=6). The permitted range for the index signal is expanded to 75 % of the tooth period. An incorrect direction of rotation of the engine cannot be detected by this setting. - N-1
Disc of type N where one event is missing, e.g. a ring gear with 160 teeth on which one tooth was removed (N=160). This missing event is used to determine the index signal.
- N-2
Disc of type N, where two consecutive events are missing, e.g. a ring gear with 160 teeth on which two teeth located next to each other were removed (N=160). These missing events are used to determine the index signal.
Number of Events
Enter the number of events that occur on the pickup if more than one event is expected. Enter the value for N and not the total number of events for the selected pickup type.
The number of events depends on the selected pickup type.
- N+1 and N+1 extended index range: Values between two and eight
- N-1 and N-2: Values between 30 and 240
Active/Passive
Select the pickup to be used from the pre-defined pick list:
- Passive
passive pickup - Active (low)
active pickup with high level as quiescent level
- Active (high)
active pickup with low level as quiescent level
Speed
For passive pickups, you can set the pre-trigger voltage so that it depends on the speed. See also the following example.
Pre-Trigger
Enter a value between 0.5 V and 7.5 V for each pickup to set the pickup sensitivity level. Signals that fall short of the set voltage will not be analyzed. A low pre-set value therefore results in a high sensitivity level, a high value results in a low sensitivity level.

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Speed-dependent pre-trigger voltage
For a passive pickup, the pre-trigger voltage is defined as follows:
- Speed1: 150 RPM; Pre-trigger voltage1: 2 V
- Speed2: 1000 RPM; Pre-trigger voltage2: 5 V
The result is the following curve:
Pre-trigger voltage (V)
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Speed (RPM)
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