CurtisT 0 Posted May 7, 2019 Report Share Posted May 7, 2019 I have been battling a difficult video issue with my Attitude V2 goggles for a few months now and came across this site while researching the details of the fatshark rx modules. Hopefully someone can give me some direction in further troubleshooting. I have 2 sets of fatshark attitude v2 goggles. On both sets I have removed the FS rx module and added a female pin header to accept newer diversity modules. I have a eachine pro58 and a realacc5808 module. I have been using these goggles/modules for over a year with no trouble with several quads with and without OSD. I recently built a new fpv quad with an FC with built in OSD and noticed I'm getting distortions in the video that fluctuate with the lighting conditions in the image. I initially tried various parts swaps, multiple FCs, cams, vtx, and different receivers; and it always came down to any FC/OSD I purchased this year have the issue (4 of them) and anything older works fine. I have a boscam fpv watch and the image looks perfect on it all the time. Also a DVR connected to the goggles records the image fine. But when I use these newer FC/OSD I get this distortion in the screens of the goggles. I purchased an original Fatshark rx module and board its soldered to and put that in my goggles. The issue went away. So I believe there is some compatibility issues with my diversity rx modules and newer OSDs on race quad FCs. I thought it might be a vsync issue but am not sure or know how to check. Video of the issue below: I found this post, and some of the info looks like it may apply to my issue. Perhaps a coupling cap on the rx signal would help me? Quote Link to post Share on other sites
Mr.RC-Cam 129 Posted May 8, 2019 Report Share Posted May 8, 2019 The popular diversity vRx modules have a design issue that results in incorrect video levels (low amplitude). So maybe the new OSD is also contributing to this issue and the combination results in a video level that is incompatible with the goggles. Just a best-guess; Without an o-scope measurement it is difficult to know what the real issue is. This DiY tool will help you check for incorrect video levels:https://www.rc-cam.com/forum/index.php?/topic/4126-diy-fpv-video-calibration-tool-low-cost/ Quote Link to post Share on other sites
CurtisT 0 Posted May 8, 2019 Author Report Share Posted May 8, 2019 Thanks! I'll give it a shot. Since I only have the issue when running the video signal through these FCs I am curious to know if they are changing the levels even if there isn't much I can do about it. Quote Link to post Share on other sites
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