Sorry, it seems my earlier email got lost. But you figured it out anyway. :) Yes, this is indeed reasonable. Moreover, I am happy if: 1: the PDP uses the extra refreshes to offer finer dithering 2: The ArgyllCMS code can handle this nicely But the refresh measurements of a different PDP were slightly different from what I expected. I can't post the log now (it was included in the lost email but I am not at home now) but as I remember it was ~30ms in 60Hz mode where I would expect ~17 or ~33. Can I override this manually? (Set it to the closest theoretical value...) 2012/3/20, Graeme Gill <graeme@xxxxxxxxxxxxx>: > János, Tóth F. wrote: >> A different PDP from anoter manufacturer measured close to 42ms with >> 23.976Hz input. >> According to the spec sheet, it displays 24Hz at 96Hz (otherwise the >> screen would flicker like hell). >> >> But the reading felt more consistent on this PDP. >> >> What kind of data can I collect to investigate this further? >> (If there is anything to investigate - I am not sure what that number >> really means, I am just guessing...) > > Hi, > sorry, it's not clear to me exactly what you are > referring to. If you mean the i1d3 refresh mode, then the > measured refresh period will be the longest one found above > 20Hz (==50 msec). This errs on the conservative side and allows > for possible sub-harmonics in (say) a temporal dithering pattern. > As long as the measurement period (integration time) is a multiple > of the actual refresh period, it will have better repeatability than > a measurement period that isn't matched. So a 96Hz refresh > would be expected to result in a refresh period measurement > of 41.66 msec, rather than the true refresh period of 10.4167 msec. > > Graeme Gill. > >