Here's a breakdown of its key Features and Functionality:

SBUS Input: SBUS (Serial Bus) is a digital communication protocol used in RC systems. The device you're describing takes SBUS signals as input. SBUS is often used in more advanced RC setups due to its ability to carry multiple channels of information over a single signal wire.

PWM Output: PWM (Pulse Width Modulation) is a common method used to control RC servos and ESCs (Electronic Speed Controllers). The decoder takes the digital SBUS signals and converts them into individual PWM signals, allowing you to control standard PWM-equipped servos and devices.

PPM Output: PPM (Pulse Position Modulation) is another method used for transmitting multiple channels of information over a single wire. Some RC systems use PPM, and the decoder can convert the SBUS signals into a PPM signal for compatibility with PPM receivers.

Two-way PPM: The term "two-way PPM" suggests that the decoder can convert SBUS signals to PPM format, and it can also convert PPM signals back to SBUS format. This bidirectional functionality can be useful in certain setups where devices communicate using both protocols.

Channel Expansion: The decoder typically expands the number of available channels. In the context of your description, it supports up to 16 channels, providing flexibility for controlling multiple functions on your RC model.

Compatibility: This type of decoder is often used in conjunction with flight controllers, receivers, and transmitters that support SBUS communication.