AJA Kona 4 Installation & Operation Manual page 69

Figure 56. SMPTE 425 Mode – SDI Inputs of Frame Rates to 30 fps
HFR 425: For High Frame Rates (above 30 up to 60 fps), KONA 4 always operates in a 4-wire mode
with each wire carrying 1/4 data like 4-wire quadrant mode, except the data is two-pixel
samples of the entire 4K image.
Figure 57. SMPTE 425 Mode – SDI Outputs for HFR
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