You can use yellow LEMO plug on the front on the amplifier box to obtain digital event marks from third-party devices. This is 2 channel TTL input of the amplifier.
LEMO connector type on amplifier side: PKA.M0.5GL.NJ
1 – GND
2 – EVENT1
3 – EVENT2
LEMO connector type for cable: PAA.M0.5GL.AC39J