terrylewis
First Officer
Flight distance : 3517287 ft
United States
Offline
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DJI Lightbridge uses radio channels which are within the ISM bands to transmit video back to the RC. The P3 has antennas in the landing gear that communicate with the RC on 2.400 GHz - 2.483 GHz. DJI initially implemented 32 channels within this band but later discovered that only 8 channels (13 -> 20) were legally available. The other frequencies are in used by ham radio, satellite comm, or are used by wireless carriers in various countries. See this spreadsheet for detailed channel specifications. https://docs.google.com/spreadsh ... li=1#gid=1477125990
The 8 channels that are available for our use can also be used by wireless routers and repeaters, so depending on where you live and fly, you can get significant interference. Our RC defaults to automatic channel selection from channels 13 to 20, and can change channels if significant interference is detected during flight. You may select Custom and choose the cleanest frequency in your area. The hack makes all original 32 channels available for Custom selection. Auto only selects within the 8 available frequencies. In my area channel 20 is almost always clean:
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