A-Pole: The range between Fighter and the target when The radar of missile goes active.
After launching the Active BVR, The missile gets its initial guidance from the platform till a specific time and then its Own radar goes active. So to provide guidance to the missile, the platform has to travel further into the threat facing it (just like semi-active). This makes him more vulnerable. Once the radar of ARH missile goes active, the aircraft can breakoff away from the target, now the missile homes on to its own guidance. That DISTANCE (between the Launching aircraft and the target aircraft) at which this missile flows on its own guidance is A-Pole.
The SD-10 platform gets a much earlier A-Pole than the AA-12 platform, hence the "Fire and Forget" property is more in it, making its Platform Safer.
Rmax: It is the Maximum claimed range of the missile at a specific height. It depends upon various factors like Speed of the launching aircraft, Speed of the target aircraft, Aspect Angle between both the aircrafts and most importantly the heights of both aircrafts. As the missile is fired at the Maximum range, the kill probablility is just close to 5-10%. the Rmax of Adder is slightly more than SD-10.
DLZ: (Desired Launch Zone) It is a place ahead of Rmax, in which the missile gets better cues and the kill probability is increased. Unlike Rmax (in which if the target aircraft turns even 5 degrees the in-flight missile may trash) , in DLZ the missile is fired with accuracy of degrees, which are marked in Ds, e.g. if a missile is fired in D10, it means even if the target turns away 10 degrees from that point, missile will hit him, same goes for D20,D30...D90, D120 and then D180 which is called E-Pole (No Escape zone) meaning thereby even if the target aircraft turns 180 degrees after launch of a missile, it will be invariably shot down.
In case of SD-10 and AA-12, This DLZ criteria is met much earlier in SD-10 thus giving it a clear edge over the adversary platform.