Hi Paul,

With the Mamba, if using it with a new transmitter for the first time you will need to calibrate this to your radio. The instructions that come with the Mamba should walk you through this step by step.

I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.

Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician