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4 miles / 6.5 km distance limit
734 9 2019-12-24
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javo-fpv
lvl.2

Spain
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It would be nice if we could use an operation mode for long range flights so that we could go pass the 4 miles limit, so we could test the full capabilities of the system, even if we lost image quality, or have more latency, that its not a problem in planes/wings.

Here its an example of this limit

2019-12-24
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DAFlys
Captain
Flight distance : 826070 ft
United Kingdom
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If your using the digital fav have you tried the naco.txt file tweak?
2019-12-24
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javo-fpv
lvl.2

Spain
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DAFlys Posted at 12-24 03:49
If your using the digital fav have you tried the naco.txt file tweak?

Yes , it doesnt matter, even at 1200mw, max distance its always 4 miles.
2019-12-25
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Daemon42
lvl.1
Flight distance : 105955 ft
United States
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FWIW, several others have verified this limit.    It happens regardless of power, or antenna gain.  
Bitrate always tanks *right* at 4 miles.  
If DJI isn't doing it intentionally (I hope not) then my guess is that it's a clock desync issue down at the digital spread spectrum level.
Perhaps it's built on off-the-shelf Wifi tech that just never bothers to account for light speed delay (about 22uS at 4 miles).  
I hope it's fixable.  
2019-12-26
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JchgMad
lvl.2
Flight distance : 3238 ft
Spain
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I think that if it could be intended, that limit of 4 miles is the only thing that justifies being able to continue selling the previous fpv system based on ocusync
2019-12-27
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Woe
Captain
Flight distance : 3746148 ft
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United States
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Awesome footage.
2019-12-29
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djiuser_qUazZVqCIdeL
lvl.1
Chile
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Thank you for opening this thread!

I can confirm this limit. We’ve just lost a quad at ~6.5km range. The reception was great (~23 Mbps) and then suddenly the bitrate dropped and we lost all visual. We were unable to recover the quad unfortunately.

Now that I’ve seen this limit I’m both glad that it seems to be a consistent limit but also a bit frustrated that there is not much we can do about it. I really hope DJI is aware of it and can fix it soon.

Another thought we had was this: Perhaps DJI is aware of it and the reason they locked down the transmission power to 700mw was this issue?

Either way, I will keep returning here in hopes of any news you guys might have.
2019-12-29
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djiuser_3wugiNxNqa9C
lvl.1

Romania
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If you don't have GPS and RTH with failsafe...why would you fly so far away?  There are so many possibilities of things that could go wrong besides hitting this limit...
1-8 01:09
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javo-fpv
lvl.2

Spain
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djiuser_3wugiNxNqa9C Posted at 1-8 01:09
If you don't have GPS and RTH with failsafe...why would you fly so far away?  There are so many possibilities of things that could go wrong besides hitting this limit...

I have RTH and GPS. Thats not even far, some of us fly that distances because we love long range flights.
1-8 01:19
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mc54
lvl.4
Flight distance : 1030 ft

United States
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Could anyone from DJI please confirm if this 4 mile limit actually exists?  If so, could you explain the reason for it, or if it is possible to remove it?
1-11 20:27
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