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Jan 16, 2016, 08:18 AM
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[Video] HobbyKing 200mW 900MHz FPV video system problem

Hi, I've just received my first FPV system: HobbyKing 200mW 900MHz FPV video system.
  • The transmitter and camera are powered with a 180mah 3S 25~40C Lipo Pack
  • The receiver and transmitter are on canal 3
  • I use a video grabber to display the video on my laptop

But nothing is displayed on my computer I don't know if the problem come from the camera, the transmitter, the receiver or... me

See the video below
20160115 001844 (1 min 4 sec)
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Jan 16, 2016, 11:21 AM
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DanT's Avatar
Lens cap off the camera ?
Video grabber needs to be set just right to see on computer .
I believe composite channel?
I have no idea what channel your VTX is on?
Oh, VTX can get real hot without air blowing on them and can burn up ...
Also did you run your VTX without a antenna on it ?
Some say they will burn out in a second without a antenna on them?
Jan 16, 2016, 01:10 PM
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Thread OP
Lens cap of the camera was removed, I've tested channels 1/2/3 and verify if channels matchs between vrx and vtx, I've never run the vtx without antenna on it.

Maybe the problem come from video grabber but I've followed all the instructions from the manual.
After hours to try it the vtx was really hot, I hope I've not burned it...

This vtx is compatible with my vrx?

Thanks for your help.
Jan 17, 2016, 04:15 AM
Registered User
No, that vtx is 5.8ghz and I think you said your rx is 900mhz. Since you are displaying your video on your computer, have you tried another video source to make sure the computer or video input adapter isn't the problem. Or plug it into a tv or something. It's ok that the vtx gets hot. If it still doesnt work maybe you have the channels wrong or the manual could even be wrong. try different channels
Jan 17, 2016, 10:50 AM
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DanT's Avatar
I agree If you are running this VTX on 5.8mhz your Receiver is,, 900 MHz???
That's your problem ...
Like trying to fly a 2.4mhz receiver in your aircraft ,, using a 900mhz flight transmitter .

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