Can anyone suggest a good path for 5.8GHz tx/rx for UAV telemetry?
Hi everyone,
Is there a good path to 5.8GHz UAV telemetry or a commercial combo?
I'm in Australia so 900MHz is illegal.
The only 5.8 GHz combos I've found being from blip and they are about 3 x as pricey as the Xbee 2.4 GHz telemetry from DiyDrones.
I'm just starting out in this UAV game (AP only so far) so I'd prefer to start on the quality but lower end till I know what quality I need etc.
FYI: I use a Spektrum 2.4 GHz set for the plane. I have some electronics skills (soldering, rewiring, building from kits) but not redesign skills (latter probably illegit anyways and I want to 'play safe' with the laws).
thanks in advance,
Brett
Replies to This Discussion
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Permalink Reply by Ryan on -
Keeping them far apart isn't going to do anything for you!
I mean, think about it, if you keep them 12" away and hope to that the signal will be weak enought to not interfere then how do you expect it to reach the ground where you're standing :)
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Permalink Reply by Brett Glossop on -
Thanks for all the replies, much appreciated.
I just found out that the Xbee rf tx would be a no go (unless modified) due to it overlapping with GSM mobile phone network.
From ACMA in Aus:
Please note: the Australian 900 MHz ISM band is strictly limited to 915 MHz – 928 MHz. Australian mobile telephone carriers operate their GSM mobile telephone networks between 890 MHz and 915 MHz so operating at or below 915 MHz will almost certainly interfere with these services. Severe criminal and civil penalties exist for interfering with licensed services.
From Xbee datasheet:
Frequency band: 902 - 928 MHz
and no C-tick (Aus certification)
Maybe someone here knows how to modify????
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ModeratorPermalink Reply by Brian on -
I'd look more into 1.2GHz. You'd get good distance and it's available (cheap).
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Permalink Reply by John Holdsworth on -
if you want to go 5.8 (against the advice here) then try BEVRC (birds eye view) web site...
www.bevrc.com
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Permalink Reply by Steve Croft on -
I've rigged up a 5.8GHz downlink for a UAV company, using Airwave TX/RX's. The TX was only 25mW, a night test resulted in 500 metres range with clear video, a small pcb 7db patch was used on the RX.
Checkout Iftron online,http://www.iftrontech.com/5.8GHz-Diversity-Pro-Receivers/c48/index.... they make a 5.8GHz diversity Pro receiver, this produces very good results.
Matching TX's range from 25mW to 500mW.
The 2.4GHz band is a bit too busy for my liking for a reliable downink. 900Mhz & 1.2GHz band are better, but, illegal in many countries.
Steve
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