Req. 5.2.2.2: "Discrete Signals from the SC to the LAT"

The SIU shall support up to 4 primary and 4 redundant (1 pulse and 3 level) discrete input signals from the SC, for configuration and power control of the LAT. Note that, due to having a cross-strapped A and B side, the spacecraft can send these as 8 primary and 8 redundant signals.

Basis (help)

[2] (3.2.5.3.3)

2: "LAT Instrument - Spacecraft Interface Requirements Doc." (NASA 433-IRD-0001)

3.2.5.3.3: "Discrete Control Signals"

The SC shall provide 8 primary and 8 redundant discrete LVDS signals for configuration and power control of the LAT. The LAT shall provide and install all associated actuators and wiring that attach to the LAT. Each set of primary and redundant signals shall be 2 pulse and 6 levels.

Context (help)

Test(s)

005: Vehicle Signals Interface Verification

This test shall verify the timing and processing of all signals from the Spacecraft, as defined in the LAT-SC ICD [28].