When flying fast and agile mini-quads, the time to transmit control information from remote to flight controller plays an important role. Latency in the transmission forces you to anticipate every move and has an impact on the precision on the race track.
On cabled systems with plugs, just swap any two wires. On systems with soldered motor wires, get the iron out and desolder any two wires, and swap them.
Once the initial euphoria of the first FPV flight has passed, one of the first questions that enters a FPV newcomer’s mind is ‘how far can I fly‘.
In the FPV world, the answer to that question boils down to the performance of two RF links, the uplink (control), and the downlink (video).
This document will attempt to demystify RF link range calculations, boiling them down into some easily understandable blocks.
There is no industry standard definition of receiver sensitivity, especially when it comes to analog video reception. Terms such as MOS (Minimum Operational Sensitivity), and MDS (Minimum Detectable Sensitivity), are thrown around in military circles, but exactly what they mean in our world is not clearly defined.
Just to illustrate this, here are three different definitions of sensitivity, which can vary from one extreme to the other by more than 10dB in a typical FPV A/V receiver.