hello ! I have problems with the ground station , and phantom 2 Namely , I have just 200-300m range . Even if I fly over 10m antenna , signal fading . That is to say , I have 3 bars signal , I 100m away, and the signal disappears completely , and in a few seconds again returns to the three dashes , the same is if I'm away 10m or 300m . When I surpass 300m, but the connection is completely disconnected. What is the problem? I use the iPad.