I did some more tests, and problem is the SPO-10 System power switch (RV06).
This switch doesn't work either in hot and cold start. Obviously in hot start the SPO-10 system is already working, but it cannot be switched off.
However, the system works well. I've tried against AWACS, F-5, F-4, F-15, different enemy pilots' abilities, and different flight altitudes. The system receives the signals correctly and also simultaneously. When I'm looked, all 4 lights flash.
Thank you for improvement, but please, fix the problem about sistem power switch.