Not done the antenna down test????????

I would bet that the instructions tell you to do a range check before you fly. This is the reason why. RTFM!

I have a 7 channel computer radio and a 9 channel computer radio. I fly mostly Hitec receivers.

I RANGE CHECK EVERY TIME I GO TO THE FIELD BEFORE THE FIRST FLIGHT OF THE DAY ON EVERY PLANE. IF IT DON'T PASS RANGE CHECK, IT DON'T FLY!

I think you get the message.

When all else fails, read the instructions. I don't have the manual but I would bet there is a procedure in there to do a range check. If not, you let me know.