964 ac question

Fellow 964 owners, when you switch your ac on, does the fender mounted condenser fan run continuously or does it cycle on and off at reguler intervals, regardless of temp, or if the car is running? Mine does. It cycles on and off at the rate of about 10 seconds. Another thing is that when the oil fan under the other fender kicks in, the ac fan starts running continously. is this normal? cheers.