Chritian J
Pencil beam only as far as I understand your question.
For others:
Some modern displays overlay wx on map, others as has been mentioned can have wx one side of the panel, map on t'other, or even wx and map side by side on the same screen.
The best (to my mind), EGWPS map and 'Target' flashing if any unfriendlies detected.
The previous poster pointing out condensation causing gimble and other probs is correct. Some types suffer badly from Radar location. Not such a problem with newer units that do not utilise moving antenna, but why on earth would you want to take heat away from electronics when operating at -56C.
Even on pre-landing, STBY is prefered to OFF.