AFHDS3 Introduction

AFHDS3 (Third Gen Automatic Frequency Hopping Digital System) is our newest and most advanced patented digital wireless protocol. AFHDS 3 combines the best of our AFHDS 2A and WS2A protocols, allowing for bidirectional real-time data packet transmission and lossless data stream transmission. In combination with our new 2.4GHz RF chip AFHDS 3 allows for a level of flexibility and adaptability never seen before, including dynamically setting and balancing the number of RF transmission channels, channel resolution, range, anti-interference requirements and latency in order to match the best use case for each customer.


Advantages of AFHDS 3

Bidirectional Real-time Data Transmission

AFHDS 3 features two-way data transmission meaning that the transmitter and receiver can both send data to each other at the same time. This increases security and stability but also enables the use of a wide range of sensors and accessories, as well as expanding the capabilities of our i-BUS expansion system.

The system is also capable of one-way communication as well as binding in one-way configurations.


Passthrough Data Transmission

Passthrough data transmission which has been added by an independent transmission module is built into the system, enables the system to take data from something like a flight controller and send it back to the transmitter or vice versa.


Intelligent Automatic RF Configuration

When an AFHDS 3 module is inserted into a radio system it automatically detects the hardware, data transmission requirements, anti-interference needs, latency and range requirements as well as the certification the product has passed, then automatically configures itself to ensure the best performance for that product.


Automatic Frequency Hopping

AFHDS 3 automatically frequency hops in the range of 2.402GHz to 2.481GHz, however depending on the outcome of the automatic RF setup which frequencies in that range that will be used will change. Not only that but each time the system is powered on both the frequencies and rules governing the hops will change to ensure that the change of interference is greatly reduced.


Digital Authentication

Each transmitter and receiver have a unique ID. Once a transmitter and receiver are bound no other transmitter or receiver can send data to them. This increases the systems security and ant-interference capabilities as there can be no accidental crossover between systems.


Low Power Consumption

AFHDS 3’s hardware uses low power components, strategic data transmission and high efficiency processing and amplifiers to extend battery life and reduce overall power consumption to a tenth of older FM systems.



  • Is AFHDS 3 compatible with AFHDS 2A?

    No however it is possible to use an AFHDS 2A module with some of our radios (such as the PL18) to add AFHDS 2A compatibility.

  • What is the difference between AFHDS 3 and AFHDS 2A?

AFHDS 3 leverages advances in hardware and software to increase performance significantly over AFHDS 2A, as well as add new and improved features and flexibility.

  • How many channels can AFHDS3 handle?

    AFHDS 3 technically has no maximum limit to the number of channels it can use, however what is practical for each product will be different.

  • What is the relationship between latency and number of channels?

The more data that needs to be transmitted, the higher the latency. This means that using 3 channels with result in a lower latency than 18 channels.

  • How do I use passthrough data transmission?

Use the PC serial port assistant + UART to configure this function with the relevant modules.

  • Can AFHDS 3 use more than one receiver at a time.

It is possible to control more than one receiver in one-way mode.

  • What do you mean by “intelligent” or “smart” RF configuration?

The 3rd generation protocol opens up a lot of the RFIC internal configuration to the application layer. Depending on the product and use case the protocol is adapted to get the best balance for the user’s needs.

  • What is the difference between one and two-way transmission?

One-way only sends data from the transmitter to the receiver and can be used to control more than one receiver.

Two-way enables two-way communication between the transmitter and receiver.

  • What effect does the number of receiver’s have on the protocol.