# Camera trigger logic - AnalogSum

The simulation of the trigger logic for the analog sum trigger is
defined as follows:

1.  An (optional) shaping of the input signal is applied using a shaper
    signal defined in .

2.  An (optional) time offset, , used in the convoluted signal of the
    "discriminator input" signal $\times$ the (effectively a convolution
    kernel).

3.  If necessary, the analog signal in each pixel is clipped (clipping
    threshold defined by ).

4.  The analog signals from clusters of adjacent trigger modules are
    summed. The clusters and modules are defined in the . A trigger
    module is composed of seven pixels and a trigger cluster consists of
    three modules, 21 pixels in total. One module can be part of a few
    trigger clusters, such that the clusters overlap.

5.  The trigger fires if the sum over all pixels in a trigger cluster is
    higher than a predefined value, .