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Robot72 is a simpler mode than Robot36 with a scan line that basically is unchanged in format for each row: - 1200 Hz for 9ms - 1500 Hz for 3ms - Y scan for 138ms - 1500 Hz for 4.5ms - 1900 Hz for 1.5ms - U scan for 69ms - 2300 Hz for 4.5ms - 1900 Hz for 1.5ms - V scan for 69ms This is in contrast to R24 and R36 which alternate between sending U and V on even and odd rows.
Y channel starts at 12ms (9ms SYNC + 3ms PORCH) U starts at 156ms (after Y scan + 6ms of separation pulses) V starts at 231ms (after U scan + 6ms of separation pulses)
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slowrxwas giving psychedelic images when decoding Robot72 transmissions. This turned out to be a lack of special-case code needed for computing Robot72 channel position information.Reference recording:
slowrxmaster branch: https://www.sigidwiki.com/images/b/b0/Robot_72.mp3This branch:
