Radio Upgrade

There are several revisions of the DJI Phantom 1 . Version 1.1.1 is the latest & greatest of the Phantom 1 line. If you purchase a DJI Phantom 1, get this version if you can.

I don't know about most of the older versions (v1.0, v1.1), but I once ended up with a DJI Phantom v1.2 . (Yes v1.2 is older than the v1.1.1). The v1.2 still has the older control radio.

You can upgrade this control radio from "PMM" (with a single receiver antenna) to "D-Bus" (with dual receiver antennas). Note that these two radio boards use different (incompatible) control transmitter radios. Below are photos the older PMM board (left) and newer D-Bus board (right).

Note that the newer D-Bus board requires an extra servo patch cable. I found that the left-hand servo cable went to "X1" on the NAZA controller, and the right-hand servo cable went to "X2". Try swapping these if it doesn't work (I had it backwards at first).

Be sure to change the "Receiver Type" form "PPM" to "D-Bus" in the NAZA-M V2 software. This setting is in the "RC" tab of the "Basic" settings panel.

Transmitter Linking

There is a little LED light on the radio receiver board. If it glows solid red even when your transmitter is switched on, then the receiver board is not linked to your transmitter. Linking instructions vary slightly between receiver boards, so follow the instructions in the DJI Phantom Advanced Manual — but here is the gist: press and hold the tiny button on the receiver board until the LED starts blinking, then switch on your transmitter. If you have the older "SR6" PMM transmitter, you do this with the throttle held in the lowest position.

The older PMM receiver board requires you take the DJI Phantom case apart to access this linking button. The newer D-Bus radio receiver board positions this linking button such that it can be pressed from inside the battery door.

Transmitters

Here are the two radio control transmitters. On the left is the "SR6", the older PMM transmitter used with the single-antenna receiver on the DJI Phantom v1.1 and v1.2. On the right is the "DJ6", the newer D-Bus transmitter used with the dual-antenna receiver on the newer DJI Phantom v1.1.1. The DJ6 adds auto altitude-leveling (let go of the altitude control, and it snaps to center for fixed altitude), and an extra lever on the back for gimbal control.