For overclocing needs, the pulse times MEASURED on the sign were:

0:
high:  294ns 
low:   954ns

1:
high:  626ns
low:   618ns


The HIGH pulse times are always the same, the LOW pulse times are shortened by increasing frequency



Current speed 800Khz

494 LED theoretical maximum framerate:
1/((494*32)/800000 + 80e-6) = 50.4Hz :(

925KHz is still fully in spec of the LEDs and provides:
58.2Hz

955KHz is only slightly out of spec and proviced a smooth
60.1fps