Every enemy signal is captured, memorized and analyzed. And, then an effective counter measure is stipulated and put into action. It goes in a loop. And, all by neural net based computational platform with AI and DL accelerators in an autonomous fashion having little human interference...4 or 5 pantsir in one day is amazing. Turkish engineers have been on the captured one it appears and exposed a weakness. Perhaps some radar or electromagnetic signal or signature. who knows but they are all ineffective for the moment perhaps permanently.
Bottom-line: you emit a signal, and you're six feet down the hell hole. No exceptions.
He [Zulkernain] said, "As for one who wrongs, we will punish him. Then he will be returned to his LORD, and HE will punish him with a terrible punishment". (Sura El Kahf, Ayet#87)