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Old May 01, 2008, 12:58 PM
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Image problem - diagonal lines

I have a problem with my video stream. There is a pattern of diagonal lines over the whole image. I made two screenshots of it:



I'm not sure but i think the direction of the lines varies so I guess its not a fixed frequency.

Has anyone experienced such noise? Those lines can be realy anoying when they get stronger and i would be very happy fixing this.

I am using a TX40 from rc-tech.ch on a seperate 7.4V Lipo. I put two chokes in series with the cam and two capacitors parallel to the chokes to filter out noise.
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Old May 01, 2008, 01:24 PM
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Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
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And what happens if you kill the motor?

ian
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Old May 01, 2008, 01:25 PM
FirstPersonFlyer
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Bavaria/Germany
Joined Mar 2008
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Hi,

looks bad, are you using 2,4GHz RC-equipment ?

Sebastian
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Old May 01, 2008, 01:29 PM
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Joined Dec 2006
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Yes.. like Ian said... what happens when you kill the motor? Geshhh I wish Kilrah would get his tooty back from military duties... he could also help you out in a flash!
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Old May 01, 2008, 02:00 PM
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This is typical switching power regulator noice. What value are the chokes and the capacitors? Also it would be helpful if you would shoot a picture of the setup - so we can see how the chokes and caps are installed.
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Old May 01, 2008, 02:00 PM
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Joined Aug 2005
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Could be the switching power supply if you're using one. It may not be filtered well enough for the camera or the video TX. Alternatively, it could be the camera shielding isn't good enough. See if the problem goes away if you adjust your grounding for the TX and the camera. Lastly, it could be coming on your receiver side as well so you may want to check that.

Daniel
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Old May 01, 2008, 03:41 PM
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Joined May 2008
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This was my setup:

I tried to remove the chokes and capacitors from the setup and the problem is gone now.
Thx for all the replies.
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