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Matrix

Matrix is part of the cooling and laser interlock systems.

Its purpose is to send "enable" signal to the SIC cards in the Power Supply crates. It sends signals to the SIC card on 13 lines, 1 of which is the VCSEL current and 12 of which enable power supply channels in groups of 4. For enabling the VCSEL current, it checks that the BOC (Back Of readout Crate) door is closed. For enabling HV/LV cards, it verifies and routes the TTL signals from the IBOX which indicate low temperatures.

Instruction on updating the Matrix at the OxfordSetup :