That depends--you never said what brand of radio you are using.....But, in general, I would say no--you are not supposed to turn on the slave radio. this would cause it to broadcast a signal. And, second, yes, you will have to match the norm/reverse switch for all of your servos for the particular model you are flying. However, as I'm currently learning with my new JR radio, Jr has a feature called pilot link that makes it unnecessary for you to reverse any channels on the slave radio--the master takes care of all of that kind of stuff for you.