Originally Posted by TheNiceGuy
Is this unit pretty much guaranteed to work out to at least 1km no matter how it is setup and what environment you fly in? Motors, escs, cameras, vtxs, etc all in close proximity?
The short answer is. No. There are no guarantees.
The long answer is.. it depends. It is *always* possible to find certain components
which represent an RFi emitter so bad that it will cut the range of a typical UHF control system
to less than 1km. For instance an SN777 (aka KPC-VSN500) will do it, all by itself.
A combination of other components might do it as well, such as a PIXIM or WDR based
board camera or some of the cheap HD cameras plus noisy current sensor or switching
voltage regulator in close proximity to the UHF Rx and it's antenna. For the latter case, physical
separation and a little filtering may be all you need to get you the range you want. But this sort of
thing can be a real problem on a multi-rotor where you just can't provide the necessary physical separation.
In that case, it's better to just try to find low-noise components rather than fight with the noise.
What RL has, is a very usable micro-power mode, which will let you test whether any component
or combination of components is reducing your range.