Acer P1223 - Manual (Page 59)

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3 HDMI - Video signal
Modes Resolution V. Frequency [Hz] H. Frequency [kHz]
480i 720 x 480 59.94 (29.97) 27.00
480p 720 x 480 59.94 31.47
576i 720 x 576 50 (25) 27.00
576p 720 x 576 50 31.25
720p 1280 x 720 60 45.00
720p 1280 x 720 50 37.50
1080i 1920 x 1080 60 (30) 33.75
1080i 1920 x 1080 50 (25) 33.75
1080p 1920 x 1080 60 67.50
1080p 1920 x 1080 50 56.26
Horizontal scan rate: 30k-100 kHz
Vertical scan rate: 50-120 Hz