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Attention: RC-CAM.com will be closing down August 2021.

The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

RC-CAM.com (main site and forum) will be closing down August 2021. This is being announced now (March 2021) so that everyone has time to download any information that is important to them. After the site is shutdown the information will no longer be available here.

We appreciate every member's involvement with advancing the FPV hobby. It is indeed sad to say goodbye to all our online friends. Be safe and stay healthy.



Image distortion/tearing with light to dark images


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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?

 

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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/

 

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