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DIY Antenna Booster
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dundee
Captain
Flight distance : 33550 ft

Thailand
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Interesting post on the Phantom3 forum (Credits to FPV Booster)


2015-7-12
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RichJ53
Captain
Flight distance : 1626135 ft
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United States
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Pretty cool... wonder if it really helps as much as they are showing in the video

Rich
2015-7-12
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dundee
Captain
Flight distance : 33550 ft

Thailand
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RichJ53 Posted at 2015-7-13 11:11
Pretty cool... wonder if it really helps as much as they are showing in the video

Rich

If so, maybe this could be a temporary solution for the 2th remote controller having signal issues.
2015-7-12
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kinsonlai
lvl.2
Flight distance : 69662 ft
Hong Kong
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Sweet... let me try making a pair.  I was getting only getting 1km+ from my i1 before the video signal started dropping.
2015-7-12
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Linolens
Second Officer
Flight distance : 501250 ft
Macao
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1km is more than LoS right?!
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dundee
Captain
Flight distance : 33550 ft

Thailand
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Linolens Posted at 2015-7-13 13:30
1km is more than LoS right?!

Yes Lino, totally agree with you.
I was thinking for stronger signal but within LOS for the 2th remote
2015-7-12
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markaguille
Captain
Flight distance : 2031818 ft
Guernsey
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dundee Posted at 2015-7-13 13:33
Yes Lino, totally agree with you.
I was thinking for stronger signal but within LOS for the 2th re ...

How far way do you plan having the second remote? I can imagine the same would work but both remotes would need these reflectors and they would have to obviously be pointing at each other, which could effect the pilot remote. Does the second remote need to be that far away? How far away does it work as standard?
2015-7-13
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arunmehta
Second Officer
Flight distance : 120891716 ft
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Canada
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If one introduces reflections in the path of the beam one gets multipath rejection algorithm kicking in ...it is best to leave the original signal as a beam and use LOS.
LOS  reception  length in lightbridge is 2-3 km long enough for most journeys :-) the two remotes use 5 ghz channel to talk to each other and will be uneffected
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dundee
Captain
Flight distance : 33550 ft

Thailand
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arunmehta Posted at 2015-7-13 18:48
If one introduces reflections in the path of the beam one gets multipath rejection algorithm kicking ...

Hi Arun...,

So the source of the video signal on the 2th remote is transmitted from the 1st remote ?
2015-7-13
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herranzpablo
lvl.4
Flight distance : 2296096 ft
Spain
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AFAIK the video to the slave remote is transmitted from the master ( i believe using 5.8 ghz).

Check out the official remote specs on DJI site http://www.dji.com/product/inspire-1/spec

Operating Frequency

922.7~927.7 MHz (Japan Only)
5.725~5.825 GHz
2.400~2.483 GHz

So probably thats the reason because master does not have the same video problems.

I don't know how the master handles the video for the slave remote....Is the device (the tablet or the phone) taking part in this process? Might be an issue with the device processor speed, RAM, etc..?

2015-7-13
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will
lvl.3

United States
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Is my logic faulty in that while going out of LOS isn't really the goal of extended distance, generally better video quality in short range with some extra forgiveness around obstacles is?

That was a hella long way to send out a bird...nerrrrrrve wracking.
2015-7-13
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tkeeg
lvl.4
Flight distance : 2629813 ft
United States
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herranzpablo@gm Posted at 2015-7-13 20:37
AFAIK the video to the slave remote is transmitted from the master ( i believe using 5.8 ghz).

Chec ...

The video being received independently by both the Mater & the Slave Tx comes from the Inspire via 2.4Ghz signal.
The 5.8Ghz signal is what the master & Slave use to communicate with each other and has nothing to do with the video signal.
The slave Tx uses this 5.8Ghz signal link to the Mater Tx to control the camera movements.
2015-7-13
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arunmehta
Second Officer
Flight distance : 120891716 ft
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Canada
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dundee Posted at 2015-7-13 19:06
Hi Arun...,

So the source of the video signal on the 2th remote is transmitted from the 1st remot ...

Dundee,
5 ghz is the freq used by two remotes to communicate with each other 2.4 ghz is the video signal being beamed to each remote independently...confirmed
2015-7-13
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mtnmaddman
Second Officer

United States
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Linolens Posted at 2015-7-13 13:30
1km is more than LoS right?!

Does it make any difference you are in China
2015-7-13
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mtnmaddman
Second Officer

United States
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arunmehta Posted at 2015-7-14 02:12
Dundee,
5 ghz is the freq used by two remotes to communicate with each other 2.4 ghz is the video  ...

that what I would like to know for sure also
2015-7-13
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Linolens
Second Officer
Flight distance : 501250 ft
Macao
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mtnmaddman Posted at 2015-7-14 07:05
Does it make any difference you are in China

yes it does make a difference if you're a responsible pilot.
2015-7-13
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