For the S.T.A.L.K.E.R.: Lost Alpha recreation, the lab entrance assumes its old location up in the eastern location of Radar, the later entrance is severely "boarded up", and, if the player is prudent, the Monolith are amenable to bribes which allows free passage.
There are five emitter antennae, one of which is out of service.
These are easily seen from a distance streaming an impressive display into the atmosphere in S.T.A.L.K.E.R.: Shadow of Chernobyl, but this is not apparent in the Lost Alpha with only the 'brain scrambling' apparitions and associated psy damage being inflicted upon any unwary intruders.
The Monolithians are, of course, immune to the ravages of the Brain Scorcher.
As mentioned in parts of Main Mission Strategy it is possible to evade certain levels and advance to later levels without turning the Brain Scorcher off. This should only be attempted with rudimentary psy protection unless the player thinks themselves truly super-stalker enough to run through the Radar Badlands as far as the rear of the CNPP gate with no protection at all.