The aluminum foil should be replaced with a good USB cable that has the
"bulges" indicating RF chokes. Adding additional RF chokes to the cable
on the end closest to the camera may help further. The GPS cable should
probably get an RF choke or two too. My final suggestion is to hit the
camera with an eight pound sledge and buy a different one that has an
FCC label.
-Pete
On 4/30/19 10:33 AM, Charles West via TriEmbed wrote:
Hello from the North!
I'm still working on the golf course robot. Recently I've run into a
rather odd issue. When I put everything together for my 1/8 scale RC
car platform, my GPS module refused to converge. I spent a solid 4
days debugging it only to eventually discover that the problem
appeared to be that my USB 3 camera was putting out large amounts of
RF interference of a spectrum suitable to interfere with my GPS even
when there was a metal ground plane between the GPS and the rest of
the equipment.
Eventually, a combination of wrapping the camera in metal tape,
placing the GPS with a ground plane elevated way above the rest of the
robot and wrapping the camera's cable in aluminum foil finally got the
GPS to converge. The only problem is, the accuracy of the GPS is far
worse than in the previous version of the robot. Originally, I got
within a 2-3 meters with an occasional drift. Now it squiggles all
over the place.
Does anyone know what I should try next to get decent performance
and/or hunt down any interference for the GPS?
Thanks,
Charlie West
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