Replies to This Discussion

Permalink Reply by Haidar Abu Bakar on March 12, 2012 at 8:39am

I totally agree..

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Permalink Reply by Jaan Kronberg on March 5, 2012 at 5:13pm

if you're looking to get HD video to the ground then teradek is pretty much one of the very few choices which will give you (almost true) HD on the ground..

i have been experimenting with teradek, got 140m solid 720/30p video. in fact, my intentions are to use teradek's as a high quality video downlink for tv broadcasting solutions (news channels etc).. obviously, teradek would never work for fpv (delay is huge)

if you will find anything better for smaller price - please share :)

thx,
jk

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ModeratorPermalink Reply by Hai Tran on March 5, 2012 at 5:53pm

@Jaan,

I've been thinking of getting the Teradek for aerial photography from my octo.  I'm finding that with analog, at close range (50m) but at 80m altitude I'm getting serve drop outs.

Rock solid at 140m would be great, is the delay noticeable? do you think it would be a big deal to use aerial still photos?  The onboard camera would shoot, its just using the video link to determine when to press the shutter.

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Permalink Reply by Jaan Kronberg on March 5, 2012 at 6:05pm

if you are just willing to get "idea" where the camera is pointing at or what is it "seeing" - i don't think teradek would make much sense.. get some 5,8ghz analog video sender and use that one.

i was also thinking that i should shoot in "burst mode" - that would give me series of photos to choose from (with gopro i set it up to shoot constantly after every second, the only problem i have to choose from a big number of shoots and sometimes it is difficult)

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ModeratorPermalink Reply by Hai Tran on March 5, 2012 at 6:14pm

I am using a 5.8Ghz Yellowyacket diversity with 600mw TX.  It gets pretty annoying to lose signal close and high when in the middle of a shoot.

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Permalink Reply by Jaan Kronberg on March 5, 2012 at 6:28pm

hmmm, i was getting pretty good results with 500mw tx and 2 receivers and patch antennas behind oracle video diversity controller.. about 1km, i think? tx/rx got from foxtechfpv.

i still think that one of solutions would be constant shooting (or just bursts) - it can be exhausting to choose best photo, but in many cases it's the only way to get usable material

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Permalink Reply by Gerry Mostert on March 6, 2012 at 1:55am

Hi Jaan

Are you saying that there is huge time delay with sending a HDMI signal to the ground from the air? If that's the case one should probably stick to an AV signal.

Check out the system below of this supplier. Looks like he is selling for $499

Hello,

The weight of the transmitter is 1 lb. 1 ounce

the dimensions are 4.75" x 5" x 1.25

Thank You and Best Regards,

Kent Christian

President
(805) 409-0208 direct line
(805) 435-6122 fax
kent@HDTVSUPPLY.com
www.hdtvsupply.com

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Permalink Reply by Jaan Kronberg on March 6, 2012 at 2:37am

@gerry, i was referring to teradek products. it is configurable and you can get as low as ~70ms, but that's still huge number if your intentions would be to use it for FPV flying.. it's okay if you want to have broadcast from some event, normally tv channels use satellite connection, where delay can be couple of seconds - so this 100ms wont make much difference (yet, there still are some challenges - syncing between different cameras, for example..)

on a supplier you've given link - i've checked here, http://www.hdtvsupply.com/wirelesshdmi.html - not sure which in particular you were referring to? 75feet seems to be the most powerful unit, which is not too much.. re: 1lb1ounce - teradek, for instance, weights about 8oz.. i don't think i'm ready to experiment for that money :)

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Permalink Reply by Gerry Mostert on March 6, 2012 at 4:38am

These are the two units I was referring to @$499.95. The one is a transmitter and the other a receiver, he claims about a mile

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Permalink Reply by Gerry Mostert on March 6, 2012 at 4:41am

Hi

I see the picture did not come out.

It is called the "Over lan extender set w/Remote IR"

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Permalink Reply by Jaan Kronberg on March 6, 2012 at 5:29am

okay, i found it. it says over LAN, which means you would have to add wifi router to make it wireless.. which means more added weight and i'm personally not that convinced, that it would work at all. it is kinda "hacking"...

_if_ you are talking about this one:
http://www.hdtvsupply.com/hdmi-over-ip-extender.html

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Permalink Reply by Gerry Mostert on March 6, 2012 at 4:45am

What I am looking for is a monitor either AV or HDMI that can receive a very clear picture on the ground for serious photography and video. When one says monitor one also of course refers to at the same time to a professional device that can send a excellent signal to the ground from the air. I am not referring to anything else except this.

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