Trigger Controller
Description
The scanner can send a trigger signal – usually every TR but this depends on the sequence implementation. This signal needs a galvanic isolation to avoid harm to the participant, the scanner or peripheral equipment. The scanner is equipped to send both an optical signal – which is inherently isolated galvanically, or an electrical signal – which needs an extra galvanic isolation circuit.
The Custom Trigger Controller accepts both the optical signal (OPTICAL IN), which is converted to an electrical signal, and the electrical signal (BNC IN), galvaniccally isolated. The user can switch between both signals by selecting the input channel (OPTICAL/BNC). All output signals are TTL-level.
The raw signal from the scanner is very short, around 10 μs. Some hardware like the MRE device needs this short pulse for proper operation. However, a lot of other peripheral hardware cannot handle these short pulses. The Trigger Controller converts the input signal and outputs the raw short-duration pulse on 2 outputs (RAW