But then the question is when PAF was firing their AMRAAM's at will why did we held ourselves?
Probably abinandan's crash would have changed the real plan behind the RoE initially put in place...
Whew.... after so many pages we head back to same question already addressed earlier.
Let me re-address it once again.
BVRAAMs need a RADAR "fix" for getting a "firing solution". With active jamming, the actual range reduces. Both sides had active jammers. That is why, F-16s missed with AMRAAMs. As the range closes in i.e. the opposing aircrafts move towards each other, there is a distance wherein a "burn through' of jammers occurs, the range being dependent on the platform's capability with respect to other. Usually, that shall be in a range wherein the opposing aircraft is in the outside envelope of the WVR engagement - aka the Dogfight phase.
Now coming to Mig-21s. What appears to have happened is that the F-16 which was targeted by Wg Cdr Abhinandan, was WVR. Probably, as his R-73 found the mark, another aircraft may have acquired him as the burn through occurred quickly as he moved out from the protective layer of the more powerful jammers of Su-30.