For this setup the motherboard has three trigger inputs which use three LEMO connectors (item 5 of the figure 2). The name of each trigger input is printed on the motherboard next to the corresponding connector.
The TRIG IN1 and TRIG IN2 trigger inputs are intended for signals coming from a photomultiplier. They are terminated with a 50 Ω resistor and the input range is ± 5V (do not exceed this input range). Therefore a 50 Ω coaxial cable should be used for these inputs. These inputs are discriminated using a discrimination level. Look the software documentation for configuring the discrimination threshold of each input (Trigger Configuration). These inputs can be ORed or ANDed (coincidence) once thay have been discriminated. Look the software documentation to carry out this configuration (Trigger Configuration).
The TRIG PULSE IN input is intended for a digital current/voltage pulsed signal (for instance a signal photomultiplier signal discriminated externally). It can accept positive and negative pulses (NIM logic, CMOS logic and TTL logic). This input is terminated with a 50 Ω resistor and the input range is ± 5V (± 100 mA). This input has a positive threshold and a negative threshold in order to distinguish the input signal levels (for example if a 3.3V LVCMOS logic is used, a valid value for the positive threshold could be 1000 mV and -1000 mV for the negative threshold). Look the software documentation to configure these thresholds (Trigger configuration).
The selection between the trigger inputs can be carried out with the software as well (Trigger Configuration).