The switch on the first picture selects "fire arm mode" - in SRP position arming of guns is controlled by SRP (firing solution computer) and you can fire only when EST DANNYE is lit (Tu<5,5s). In the other position you can fire when you want to, regardless of Tu.

The second one selects button or pedal (trigger selection?)

The last one changes radar frequency.

PS: pozdravuji z Prahy do Liberce :-)