Anti skid & Autobrakes
From the MRG ,
ANTI SKID is one of the inputs to the Autobrake arm logic that if INOP gives SPEEDBRAKES DO NOT ARM annunciator .
From one of our engineers, the wheel spin up signal is derived from the anti-skids, therefore if INOP cannot provide the wheel-spinup signal necessary for Auto Speedbrake deployment.This automatically would give the SPEEDBRAKE DO NOT ARM annunciator if we tried to arm the speedbrake lever.
Therefore, the requirement in the ANTISKID INOP checklist to manually deploy the speebrakes on landing.