János, Tóth F. wrote: > 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. It's hard to say. You would really need some independent means of verifying the actual refresh period. If you try the calibration several times, do you get consistent values ? You could recompile with #define PLOT_REFRESH in i1d3.c and see what the plots show. Graeme Gill.