iX12 Manual

Fade: occurs when the receiver does not receive a complete data packet.
A data packet is one sequence of numbers that represents all of the control
signals for one instant in time.
Frame Loss: represents simultaneous antenna fades on all attached
receivers. If one receiver experiences a fade, one of the other attached
receivers can still pass a complete packet to the main processor, and the
system proceeds without a recorded frame loss. Spektrum receivers without
remote receivers will report the same data for frame losses and fades. The A,
B, L and R antennas represent each remote receiver; they will not report data
if a remote receiver is not connected.
Hold: occurs when 45 consecutive frame losses occur. If a hold occurs during
flight or during a range test, re-evaluate the system. Relocate the receiver
and/or check to make sure the transmitter and receiver are working correctly.