Watch In HD for best viewing.
In this video Alex & I test the top 5 LRS radio systems in this shoot out.
If you just can't wait to hear what the results are check out the last 7 minutes of the video as we give a complete overview of our thoughts on this test and the results. (But really you should watch the whole video its good)
We wanted to thank all the guys that sent us their privately owned systems to test.With all the test setups, running in the rain, video editing, mad scientist inspired meetings we spent close to a 100 hours on this project. We received no compensation of any type for the making of this video. We hope you learned something from this video that will help you as you continue this fun hobby of flying FPV.
Video TX& RX Tested: 1258 &1280
At the start of the video I say 1256 but that signal is 1258 sorry for this mix up.
Below are the merits of each system in a nutshell:
EZUHF - A bit pricey, but rock solid. This is the best LRS for really tough RF environments.
OpenLRS - Cheap and it works. Best bag for the buck. Upgrade to the OpenLRSng firmware for best results. DO NOT use a transmitter exceeding 1 Watt with this system and it is a good idea to coat the RX in epoxy to keep it from breaking.
RangeLink - Inexpensive and it works well. The only issue is that there are harmonics on the 1.3GHz and 900MHz bands that is going to limit your ultimate range a bit.
DragonLink - Moderately priced but serious harmonic issues. This system has extremely long range capability but DO NOT USE 1.3GHz video or your range will be severely weakened.
Scherrer - Expensive but long range. Only very slight harmonic issues measured. The weakness of this system is other transmitters on 433 MHz.
LRS Systems:
EZ UHF: http://www.immersionrc.com/
Rangelink: http://www.rangepiloting.com/rangelink-uhf-lrs-accessories-c-65.html
Sherrer UHF: http://www.tslrs.com/
Open LRS: http://www.flytron.com/16-openlrs
DragonLink: http://www.dragonlinkstore.com/v2/
We hope this video helped you in picking your LRS system of choice.
There are lots of great systems here so make sure to watch the full video if you want to know all there is to each system.
Thanks for watching.
Jeremiah Aka Bondjr. & Alex Aka iBcrazy
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My only critique would be that you didn't wait for the BNC attenuator before performing the tests. I realize that you stressed the point that the tests were not exactly the same, but in that case, I would rather that system be excluded, or the test made the same.
That being said. I really appreciate the effort that went into the testing and the video presentation.
Nice Job!
5 stars!
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Been thinking about LRS and this REALLY helps.
But referring to clean mobility. . . and going a mere 600 feet!? I can certainly think of a cleaner RF 2-wheeled vehicle. . .I think Alex should reconsider the handle to 'IBLazy'. ;-)
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Jeremiah
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I'm super impressed at the sheer effort you've put into this experiment
and really do appreciate the time you've spent to help others.
I'd also be keen to see what the HK OpenLRS system does BTW.
Thanks much.
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http://www.rcgroups.com/forums/showpost.php?p=25191670&postcount=11808
"The worst they did was to compare range, with antennas removed from the RX,
what they actually measure is ONLY how well is the bare pcb shielded,
the better it is shielded, the less range you get that way,
so less range measured that way is actually better :-)
does that matter ? not a darn thing, since what you want is to run the RX with antenna,
and that one pick up millions time more signal compared to what the board can pick up
unshielded, so no need to add nice tight and heawy shielding,
so that result is, even to put it nice, compleetly useless :-)
To measure HARMONICS, you dont use a video receiver..
you use a SPECTRUM ANALYZER !!
you need to find out exactly how many db the 3rd is under the main carrier..
it is called dbc for db under carrier.
By using a video receiver, you dont reveal a darn thing, since all systems hop
at a little bit different bands and a bit different timings, so how well this hit the video rx
is just pure random result, and dont tell a thing at all..
Correct video (system frequency band planning) is always a mandetory task to perform.
and you will NEWER EVER be able to use a video band at EXACTLY the 3rd
of any other TX frequency in a system.
Any user simply change the video channel to the one, with as little as possible
conflict with his LRS :-) problem solved.."
and continues.....
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Receiver is very sensitive, and is catching all signals from air with the entire circuit board, I mean, A receiver is working without antenna because the receiver is not fully shielded. If you put the receivers into a metalic shielded box, the transmission distance will be strongly reduced. In fact, it is better for the receiver if you put it in a shielded box since you are protecting the receiver circuit from external interferences.
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