Airking Pilot
 lvl.4
Flight distance : 3228383 ft
Argentina
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Hi
I have been in a conversation (in a FB DJI group) regarding the Multilink and I found intersting posting the whole conversation here because someone can miss something:
NY- So tested out the multilink on set over the weekend. We left one controller with VTR for video feed and it works. But it does not work well and not how you would of expected it. Controller antennas need to aim at inspire 2 to get clean video.
The controller gets video feed from the aircraft not master controller, some people have already posted that information already.
DJI should have made video feed from master with multilink. Disappointed.....
AP-We are totally with you.
Our sits in the Pelican case all the time. $200 plus shipping wasted. And we bought it after some great review. Nobody adviced about this "detail". Useless for us.
JC- It seems this is how a bunch of their newer slave stuff may operate... the 210v2 slave also gets the feed from the aircraft now, not from the master... I wonder if this is how all future setups will communicate
OS- wait.... so..... what does the multi link actually do then?
MA-We've found it to be fine, just don't expect it to be a perfect picture at 150 meters as they say. They are a fix for user who have a need to walk away from their camop when operating which for us works great. Streaming to a DP's monitor works ok too, just don't go much beyond 50-60 meters with clear line of sight.
Btw NY if you was testing with the controller stuck in all that metal frame and wires, it won't help much...
NY- No. It's only resting there. VTR guy had to hold in his hand and try to make sure it aims at the aircraft. Also it's no good for a camera op either, now camera op has to move and make sure he is line of sight at all times while capturing epic shots.. without multilink my op did not have to think about moving los with the craft.
It's not a good product. They should have made both video and radio signals transmit to and from MASTER.
MA- Well that's a weakness in the original design, but, we have found it to be fine, not perfect but at least we can now move apart.
AP- I´m sorry, but that´s an answer to keep a child content. If the weakness was master-slave connection (control AND video), why DJI added another weakness that is drone-slave signal? It does not make any sense. At all. We bought the Multilink after some fantastic reviews but nobody noticed us this point. As NY says, now camera op. must move and make sure he keeps LOS. Simply silly.
MA- No it was an observation of what we have found. Let me explain.
Right front the I1 the weakness in the design was having the master controller send the video feed to the second remote. Which meant, the ONLY way you can have a stable video feed on the second remote is to actually FACE each other as the antennas worked better that way due to their positioning within each controller.
DJI after years of using the same controller layout in both the LB1 (Inspire 1, M600, the standalone units. And then subsequently the LB2.5 in the I2 and M2* series) They finally decided to at least address the problem with Multilink. The original problem was everyone having issues with video feed to the camops controller if not stood within a few meters of each other. And preferably at least 3 or 4 meters away, and facing each other. This made for a rather impracticable function.
DJI now (belatedly) produces something which now means the 'pilot' and the camop can at least move away from each other without the camp having dropouts at a reasonable distance. The amount of times I have been on a job and have to ask the camop to walk with me as I'm having to reposition to keep the drone LOS isn't particularly funny, especially when the camop is trying to concentrate on the shot while giving me instructions.
So, not sure if a child would understand half of that, or maybe you haven't?
AP- Really sounds sayed ironically.
"DJI now (belatedly) produces something which now means the 'pilot' and the camop can at least move away from each other without the camp having dropouts at a reasonable distance"
Because this is a fallacy. Cam op. can loose totally the video signal even when Multilink is receiving "excellent" if he gets behind any obstacle during the drone path as explained for those who haven´t already tested de Mutlilink.
The only thing that DJI had to do is make master-slave connection more robust. Control and video. They fixed one and broke the other. As you said:
"The amount of times I have been on a job and have to ask the camop to walk with me as I'm having to reposition to keep the drone LOS isn't particularly funny, especially when the camop is trying to concentrate on the shot while giving me instructions"
The simplest solution had been add external, with more gain antennas (may be removable, with the option of mounting in different places?). Multilink was an overkill, bad idea.
MA- But you are talking of a design from 2014 at least. Things have moved on and DJI in 2013 when they were developing this was a way way way smaller company than they are now. Surely your electronics degree understands this?
AP- Hey MA, I feel this is evolving in a personal discussion that is leaving us to nowhere. The point is:
Multilink did no fix what was not working. And I feel for your comments that you try to defend this DJI product when there is for sure a failure in the desing and legitimal user feedbacks like NY and me.
For us was a waste of money and the review that lead us to buy it was not mentioning this point.
That´s all and it´s something that every potential Multilink buyer should know. If not is just hiding key information.
DJI did not find a way to enhance Master-Slave connection even with Multilink.
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