User`s guide

18  Installation
Legend:
Ain : Analog Input Channel n ( single-ended)
AIHn : Analog High Input Channel n ( differential)
AILn : Analog Low Input Channel n ( differential)
ExtRef n : External Reference Voltage for D/A CH n
Aon : Analog Output Channel n
ExtCLK : External Clock Input
ExtTrig : External Trigger Signal
CLK : Clock input for 8254
GATE : Gate input for 8254
COUT n : Signal output of Counter n
V.ERF : Voltage Reference
A.GND : Analog Ground
GND : Ground