Walking through the different connections for the DJI Digital FPV System.
1:25 - Power & Ground (red & black wires) - powers the system so that it will provide video to the goggles. The system can now be used for FPV
3:15 - MSP connection (white & grey wires) - connects the DJI Air Unit to betaflight which will allow for data communication. Provides for On Screen Display, PID tuning, and other functions in the DJI goggles
5:52 - RX connection (yellow & brown wires) - DJI Air Unit provides reciever signal to Betaflight. SBUS or DJI HDL protocol
Check out our complete review of the DJI Digital FPV System on the Rotor Riot channel: https://youtu.be/-MkVrdaZu4s