Tag Archives: range

Argtek Phantom 3 Controller Mod

Finally, I had some time yesterday to perform the mod. Together with all the recording, it took me around one hour and it’s actually quite easy. You just have to take your time when removing the glue around the existing connectors and it’s a bit tricky to connect the new wires.

Here is how the controller looks when open

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When hooking up new connectors you have to make sure that they are absolutely parallel to the board, then apply pressure and you would hear a click. I have also used a glue gun, which I picked up for around £7 and I think it’s a must.

I have also removed the old 2.4 GHz antennas, which are actually very small. No surprises here, in my case the video feed would cut out after 100 metres.

The kit comes with two directional 2.4 GHz 7dBi antennas for the video feed and one 10 dBi 5.4 GHz antenna for controlling the drone.

The mod promises significantly longer range – up to x4 times! I’m hoping to have the video feed up to 0.5km and control range of around 1km.

The best thing about the mod is that it allows using any standard WiFi antennas and further extend the range by using WiFi amplifiers.

Here is the recording of the job, compressed into 5 mins

DJI limit drones’ range if you are not in the US!

On DJI drones the GPS location is used by the aircraft/remote control to adjust the power output of the signal transmission to meet the local regulations. In the US, the governing body is FCC (Federal Communications Commission) in Europe it’s CE (Conformité Européenne). Doing that allows DJI to sell the same device in both markets.

In case of Phantom 3 Standard, when I say “power output” I mean both the 2.4GHz link – the bi-directional communication between the aircraft through the remote control, and the 5.8GHz control signal – one-way link to the aircraft.

FCC seem to be far more generous and allow for higher levels of power output by consumer devices. CE, on the other hand, are more strict in that regard. What this means is that, if a DJI drone detects that it’s outside of the US, it automatically applies the CE standards, even though you might not be in Europe. It either goes by FCC or by CE regulations. How and when exactly this limitation is applied is somewhat of a mystery to me (I’m still researching this topic, so please do let me know in the comments if you know the specifics). This lowers the power output of the transmission on both, the aircraft and the the remote control from 27 dBm to 17 dBm – almost by 40%! Inevitably that results in reduced range for those of us operating our drones outside of the US.

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