One being FCC for the US market, and one being CE for, well, everyone else really.
The specs of each are:
Model # MT1SS5
– 5.8 GHz: <30 dBm (FCC); <28 dBm (SRRC)
Model # MT1SD25
– 2.4 GHz: <19 dBm (MIC/CE)
– 5.8 GHz: <14 dBm (CE)
I had assumed that DJI were making two different hardwares with different radio configurations in them (and in the remotes that they connect to).
Couldn’t quite get my head around that though. Since forever, DJI have only ever produced one hardware model and managed their FCC/CE through the use of GPS location. So if you’re in the USA it automatically switches to FCC mode, and back to CE when you’re home.
Hence too, we’ve always been able to hack our drones and force FCC mode.
This also didn’t make economic sense to me.
From a factory/production point of view, it’d cost them significantly more to mass-produce two physically different drones.
Anyway, having done waayyyyyyy to much research on this, I’ve come to the conclusion today that this is not the case, and that they are making only one physical model and simply supplying different stickers (FCC vs CE) depending on the market they’re shipping to.
What convinced me of this?
A letter from Xi Xiang, Product Manager at SZ DJI Technology, to the Federal Communications Commission back in June this year, which said:
Let me just run the key part of that letter that by you again:
The other frequency bands are disabled by firmware in factory.
So there we have it…
We will be able to hack this and force FCC in the future.
Source (because it bugs the shit out of me when people claim to quote facts and can’t back it up):