Systems Computer Monitor User's Manual

Title: Product Specification: LC12 High-Bright Monitor Page 13 of 24
Document Number: 023-0284-01 Revision: A
4.5 Video Signal On-Off Sequences
The sequence for bringing up and removal of each video input signal can be in any sequence or
combination of input signals.
Video Modes
IBM VGA VESA
Resolution 640x400 640x480 800x600 1024x768
Video Clock 25.175 MHz 25.175 MHz 50.000 MHz 75.000 MHz
Horizontal Scan
Freq. 31.468 KHz 31.468 KHz 48.077 KHz 56.476 KHz
Horizontal Line
Period
31.778 us 800
pixels
31.778 us 800
pixels
20.800 us 1040
pixels
17.707 us 1328
pixels
Horizontal
Blanking 6.356 us 160 pixels 6.356 us 160 pixels 4.800 us 240 pixels 4.053 um 304 pixels
Horizontal Sync
Pulse 3.813 us 96 pixels 3.813 us 96 pixels 2.400 us 120 pixels 1.813 us 136 pixels
Horizontal Front
Porch 0.636 us 16 pixels 0.636 us 16 pixels 1.120 us 56 pixels 0.320 us 24 pixels
Horizontal Back
Porch 1.907 us 48 pixels 1.907 us 48 pixels 1.280 us 64 pixels 1.920 us 144 pixels
Horizontal Active
Display 25.422 us 640 pixels 25.422 us 640 pixels 16.000 us 800 pixels
13.653 us 1024
pixels
Horizontal Sync
Polarity - - - -
Vertical Scan Freq. 70.087 Hz 59.94 Hz 72.184 Hz 70.069
Vertical Frame
Period 14.268 ms 449 lines 16.683ms 525 lines 13.853 ms 666 lines 14.272 ms 806 lines
Vertical Blanking 1.557 ms 49 line 1.430 ms 45 line 1.373 ms 66 lines 0.673 ms 38 lines
Vertical Sync Pulse 0.064 ms 2 lines 0.064 ms 2 lines 0.125 ms 6 lines 0.106 ms 6 lines
Vertical Front
Porch 0.381 ms 12 lines 0.318 ms 10 lines 0.770 ms 37 lines 0.053 ms 3 lines
Vertical Back Porch 1.112 ms 35 lines 1.049 ms 33 lines 0.478 ms 23 lines 0.514 ms 29 lines
Vertical Active
Display 12.711 ms 400 lines 15.254 ms 480 lines 12.480 ms 600 lines 13.599 ms 768 lines
Vertical Sync
Polarity - - - -
Note: VGA border is not included in the Active Display time described above.