I installed a DJI AVL58 RX/TX Transmitter on my Phantom. I know read/heard somewhere not to turn on the TX without the antenna installed or you can cause damage. On two occasions I forgot to install the antenna only briefly for less than 1 min. What exactly could happen? I'm just trying to find out if I caused any damage. It seems to be ok but I have not had an opportunity to test the signal distance. If it's a fried unit then I'm ok because it still works at least at a close distance.