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  1. 5.8GHz seems to 'need' diversity less than 2.4GHz in terms of dropouts, but even so I thought I'd try the new FR632 diversity receiver for a local plus high gain arrangement. Bench tests seemed okay, but on fitting it into a real system I found picture roll on some screens, intermittant 'interference' across the middle of the screen on others. Swapping the part out for an Airwave module or a 5.8GHz single-input 'scanning' receiver gave a perfect picture, so I suspected a sync problem in the FR632. On the 'scope' the outputs are different (see attached) - FR632 - Airwave - Scanner. Everything else was the same - okay, there was a OSD message flashing on and off in all three cases, which probably explains the slight extra 'detail' in the video trace for the Scanner. The Airwave and Scanner outputs, although at different references to earth, look fine, with a clear sync pulse at the beginning. In practice these receivers perform well. The FR632 looks odd, and is awful. Any suggestions how I might fix this? Online reviews of the FR632 are full of praise, so presumably it's just this one...
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