Video Adaptor RF interference

[sstearns2]

I just upgraded from Skyview classic to HDX. The camera/video adaptor worked perfectly with the classic screens, but with the same set up going into the HDX screen it is sensitive to COM radio transmissions. The higher aviation com frequencies interfere with the picture and the lower frequencies knock it off line completely. I was using the pigtail USB lead on the classic, but now it’s connected directly to the back of the HDX screen.

Any ideas?

Thanks,
Scott

 

[Rhino]

I would try a shielded USB extension cable first, and check the adapter at various locations. That's probably simpler than any other options.

 

[sstearns2]

Thanks. I ordered a shielded USB. I think I’ll try plugging the video adaptor directly to the Skyview screen and see if that fixes it.

 

[Rhino]

....I think I’ll try plugging the video adaptor directly to the Skyview screen and see if that fixes it.

I thought your first post said it was plugged directly into the HDX????? Or was that a joke about the front of the screen?

 

[sstearns2]

I should have been more clear. The classic screens have a USB extension built into the wiring harness. This extension can not be used with the HDX screens, so it has to be connected to one of the two ports on the back of the HDX screens with a USB extension cable.

I tried it today with the video adaptor plugged directly into the back of the HDX screen and it’s still effected by the same RF frequencies, but it does not go totally off line like it does with a normal USB extension cable. That’s a significant improvement.

 

[airguy]

You've clearly got some excess RF running around in your plane from the COM transmitter - that indicates a high VSWR which could be a result of an antenna problem (usually bad grounding) or a bad coax cable "leaking" RF. If you can't resolve your issue with the USB cable routing, start looking at the COM radio, cable, and antenna.

 

[sstearns2]

The video worked perfectly with the classic screens. The problem began when I upgraded to the HDX screens. All the other hardware is the same.

 

[sebasti007]

It is well known by Dynon that the video adapter have side issues, I have addressed it for my new aircraft over three years ago, they cancelled the use of it with a system update for quite a while, then it came back and the support told everything should be fine. Nothing changed, whenever I do use the camera the display has interference and red crosses appear for milliseconds and the AP goes off. It disappears when booting it again up. So my essay is not to use the camera…..