What are Receivers (Rx)?

What are Receivers (Rx)?

Your passion to capture the unexplored corners by covering that extra mile and transcending the limitless sky must have drawn you towards FPV drones. Did it not?? Let’s now discuss about something that interests us all. Something that actually facilitates the first person view, the FPV video Receivers.

image credits : getfpv

FPV drones are equipped with a small camera. The camera’s video signal is conveyed to the video transmitter that acts like that middle-man who is responsible for formatting and amplifying the video signal before broadcasting it. The whole purpose of convenience provided by FPV drones, by helping you perceive things that the naked eye can’t, will eventually fail if this video signal is not properly received at the pilot’s end. This is facilitated by the FPV video receivers. It’s primary function is to receive the radio frequency waves that are carrying the visual/audio information captured by the camera and convert them into video signals that can be perceived by the pilot wearing a pair of goggles. In a nutshell, you can consider FPV video receivers to be like video transmitters just that they function in a reverse fashion. We will be discussing about the analog systems(people also use digital systems) in this blog because of their wide application and preference.

The most simple FPV drone video receiver has a single receiver module that makes use of a single antenna. But if you are looking for nothing but the best then two separate working modules functioning together, called diversity, provides optimal video reception. Then a logic board figures out the better video signal from the ones received by 2 receiver modules. This is done based on the signal strength wherein a stronger signal strength is further transmitted so that it gets displayed on the goggles.

For racing and freestyle drones, the most appropriate frequency for any video transmission is 5.8 GHz band. Within the 5.8 GHz frequency, we can actually use a wide range of frequencies, from 5.3 GHz to 5.9 GHz. The 5.8 band has been divided up into channels. Video receivers are usually attached on the tripods, with the goggles that are plugged in to the receiver with the help of an A/V cable. But nowadays, video receivers are manufactured with a smaller size so that they can be easily accommodated within the goggles while being integrated with other systems into modules. And these kind of goggle based modules are highly preferred by freestyle and racing pilots. Although for long range FPV it is often advised to have video receivers mounted on a tripod so that to ensure that longer range directional antenna is pointed towards the aircraft. Some video receivers come along with additional features such as the modules to auto-scan RF-noise floor or scan the channels that are not being used.

image credits : getfpv

That covers everything that you must be looking for, while researching about video receivers. We hope that it was well received at your end. May your zest about FPV drones lasts you a lifetime. Till then, keep hustling, keep exploring!


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