I would like to toggle this parameter as we monitor the output from the video cable with our scope but the concern is if I lose all visibility of the display, how would be be able to get back in to change the parameter back?
If the H freq changes when flipped to color, the OEM CRT may not work at all as they are tuned usually for a narrow freq range. If the H freq does not go up, I also could not plug in an LCD to see it either as the Hfreq is slightly lower than they can work with (thanks Fanuc).