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ModelMatch is a Spektrum technology designed to prevent the pilot from trying to fly a model with the wrong model memory selected on the transmitter.

When the receiver is bound to the transmitter, it learns the model number that the transmitter is set to, as well as the transmitter's unique identifier. The transmitter broadcasts both the transmitter id and the model number along with the servo positions, so when the receiver initially connects, it can compare the expected model with the model number it receives, and will refuse to respond if these values do not match.

When using a Spektrum transmitter module in a legacy transmitter, the module has no way of knowing which model has been selected, and so ModelMatch will not work with receivers bound to the module.

Some Spektrum DX6i transmitters have a software bug that means that memories 9 & 10 share the same ModelMatch identifier.

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