You have the same on the right of Z screen - two switches for wartime frequency (never used in peacetime - hence secured), for epsilon (left) and beta (right) antennas. Similar functions can be found in Krug and Neva (just look for secured switches ).

I recommend reading this forum (83 pages and growing, I know...) and the previous thread about SAM simulator, and any of you will find answers for most of your questions.