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Permalink Reply by Jake Stew on June 8, 2012 at 12:49pm

Do the units have antenna diversity (two antennas)?  It would be pretty cool to use that feature of 802.11n with both an omni and a high gain.

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ModeratorPermalink Reply by Hai Tran on July 7, 2012 at 9:33am

yes, the Teradek has MIMO antennas

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ModeratorPermalink Reply by Hai Tran on July 26, 2012 at 6:21am

Finally did a proper aerial test of the Teradek 255 on our octo.  Got 300m flying at 30m AGL, did a few pirouettes and no loss of signal or pixelization with the bitrate set to 2MBps, 720p 50fps, source GoPro Hero 2, ground station was a Ubiquity Nanostation 5.8Ghz.  Could have going further but due to ground traffic we were limited to 300m.

Without the Nanostation and the built in wireless of the decoder, we only got 100m.

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Permalink Reply by Nicol Verheem on July 26, 2012 at 11:09am

Glad to hear it's working for you, Hai.  You might get slightly better performance from  a ReplayXD. It actually outputs 1080p or 720p on the HDMI whereas most consumer cameras (incl goPro) output 1080i interlaced, regardless of the actual recording mode.  So you won't have any interlacing artifacts in motion areas.

If you need even more range you should try directional antennas.  Shout if you need help.

Cheers

Nicol

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ModeratorPermalink Reply by Hai Tran on July 26, 2012 at 11:17am

Hi Nicol, so far no issues with the Hero2 and the Teradek.

The Nanostation has a 16db MIMO antenna which I believe is directional but with a nice wide 45 degree arc.  Apparently the nanostation is designed to work to 15km.

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