how do I get channel 3 without my remote on my sharp aquos ?

HD digital TV channels are shown like that since there are multiple channels such as 11.1, 11.2 . The actual channel number may not show at all but if the channel is being picked up it might be in a different spot.
If you are trying to connect something that only has a channel 3 RF output then you may not be able to scan for both analog channel 3 and the other digital channels with both showing in the same list.