I am connecting a photon counting head through SCB-68A with 6612. My questions are:
1. The output of the photon counting head is TTL, which digital DIO termials should I connect to on the SCB-68A, P or PFI? What is the difference?
2. The photon counting head output need a 50 ohm impedance. What is the standard way of adding this impedance? Should I use a 50 ohm BNC terminator before SCB-68A?
Hope someone could help me here. Many Thanks!
Alex