Pakistan will be using AN/ALQ-211(V)9 in future.
http://rf.harris.com/media/Advanced_Integrated_Defensive_Electronic_Warfare_Suite_tcm26-28659.pdf
Before you say anything please read this
http://www.hscott.net/DRFM.pdf
Don't know how good our Battery level Radar will perform against it, would help if anybody is able to find spec of BLR but I guess that will be a secret
http://www.bharat-rakshak.com/media/4479-1/akash-info.pdf
CAR (3d) radar sounds better but don't know how that will perform either but GCC will slot to BLR, so BLR is our guy who needs to perform.
according to my limited info
The DRFM based jammers primarily targets the air search radar
Rajendra is a multi-target and multi-function phased array fire control radar which has a range of about 80 km in search and will be the prime target for these jammers.
hypothetically here the AIDEWS (AN/ALQ-211(V)4) DRFM jammer will be intercepting the radar signal being sent out from the rajendra, and will then modify the signal by introducing false information about the target, and finally than re transmit the modified signal toward the rajendra. thus the rajendra will find it difficult to distinguish the altered signal from a legitimate target signal because the altered signal contains all the signatures and fingerprints of the original radar signal beamed from rajendra.( what we saw is both time domain and frequency domain manipulation of the rajendras radar signal )
therefor when rajendra goes to engage the target it sees nothing in that part of the sky where it had previously been misled into believing the target is.
life can be made miserable for DRFM based jammers like the one found in AIDEWS (AN/ALQ-211(V)4) if
LPI radar is used (They send complex waveforms that is like noise and can only be made sense with filtering, however mismatched filtering at the jammers end plus juggling of every parameter like frequency, PRF, modulation, pulse width at every moment and very randomly, will fail it)
if AESA radar are used (whose characteristics such as random scan pattern, random frequency, random PRF all make it very resistance to DFRM jamming)
but how much the rajendra is immune to DRFM based jammers i dont know.
DRDO uses DRFM technology and therefor should be well versed in its counter as well and must have implemented some to the PESA rajendra ECCM.