The Invalid Format message will display on the receiver's output if one of the following occurs:
a) An incompatible video signal is used. Examples are output signals above 1080p60, signals not in a 16:9 aspect ratio, 1280x720 signals with frame rates below 50, or certain Standard Definition signals.
b) A Tomahawk1 transmitter is in use with the Tomahawk2 receiver, and the camera is set to output a PsF video format. The most common case is using 1080p23.98 on a Sony Camera, since these cameras use PsF rather than true progressive.