Auto power down

The capability to automatically switch a device from On Mode to Sleep Mode after a predetermined period of time (APD timing) has elapsed. APD timing begins when both: 1) The device has ceased performance of all Primary Functions, and 2) The last user input has been received (e.g., remote control signal, volume adjustment). If either a Primary Function resumes or a user input is received, the APD timing will reset. The intent of APD is that products will automatically power down into Sleep Mode when they are not being adjusted by the user and are not performing a Primary Function.