This trigger cable transmits a 1-bit trigger marker. The output of the trigger cable is usually TTL (transistor-transistor logic), meaning 5 V for High and 0 V for Low. However, other voltage levels or an AC signal can be transferred with this trigger cable. One end of the cable is a D-Sub 25 connector, connected through to a single BNC connector. The cable transmits 1-bit trigger marker information to pin 2 (1st bit of a standard TTL trigger layout cable). Hence, for a standard LPT configuration, every odd trigger marker (1, 3, 5, 7, ... 255) is transferred to the receiving end connected to the BNC connector. Pin 25 is used as ground (GND). The pinout can be adjusted upon request. The cable's length is 10cm. Cable color might vary.