anchor.diff:  
   			radio_connection.post_signal(src, signal, range = AIRLOCK_CONTROL_RANGE, filter = RADIO_AIRLOCK)
   	return
  -		
  +
   obj/machinery/door/airlock/proc/set_frequency(new_frequency)
   	radio_controller.remove_object(src, frequency)
   	if(new_frequency)
  
positive.code: 
  	var/on = 1
  	var/alert = 0
  
  
  obj/machinery/airlock_sensor/update_icon()
  	if(on)
  
negative.code: 	..()
  
  	if(radio_controller)
  		set_frequency(frequency)
  