1) for johncliu88, the DDG was designed and built by North Korean engineers, technicians and workers, there is no reason to ask for help from the Russians who have no knowledge of this ship.
2) for sutton999, the AWACS aircraft is used by the DPRK, furthermore it is evident that the radar radon is not of the same rotating type as those in use in Russia.
PS
I think and hope that the intentions for what was written in your posts was to try to bring a constructive contribution to the discussion.
However, there is the risk that for what was stated someone could instead think of the method that is often labeled with the nickname of the creature of Scandinavian mythology.