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26 Polaview 215E LCD Projector User’s Guide
Getting started
Factory preset timing
Preset timing
IBM 640x350 at 70 Hz IBM 640x400 at 70 HZ IBM 640x480 at 60 Hz
Dot Clock 25.1745 Mhz 25.1745 Mhz 25.1745 Mhz
Horizontal frequency 31.4681 Khz 31.4681 Khz 31.4681 Khz
A-Period 31.778 µs (800 dots) 31.778 µs (800 dots) 31.778 µs (800 dots)
B-Blanking 6.356 µs (160 dots) 6.356 µs (160 dots) 6.356 µs (160 dots)
C-Sync Width 3.815 µs (96 dots) 3.815 µs (96 dots) 3.815 µs (96 dots)
D-Back Porch 1.907 µs (48 dots) 1.907 µs (48 dots) 1.907 µs (48 dots)
E-Active Time 25.423 µs (640 dots) 25.423 µs (640 dots) 25.423 µs (640 dots)
F-Front Porch 0.636 µs (16 dots) 0.636 µs (16 dots) 0.636 µs (16 dots)
Vertical frequency 70.0849 Hz 70.0849 Hz 59.939 Hz
A-Period 14.268 ms (449 lines) 14.268 ms (449 lines) 16.684 ms (525 lines)
B-Blanking 3.146 ms (99 lines) 1.5557 ms (49 lines) 1.430 ms (45 lines)
C-Sync Width 0.064 ms (2 lines) 0.064 ms (2 lines) 0.064 ms (2 lines)
D-Back Porch 1.907 ms (60 lines) 1.113 ms (35 lines) 1.049 ms (33 lines)
E-Active Time 11.122 ms (350 lines) 12.711 ms (400 lines) 15.254 ms (480 lines)
F-Front Porch 1.176 ms (37 lines) 0.381 ms (12 lines) 0.318 ms (10 lines)
Sync Polarity (H/V) Positive/Negative Negative/Positive Negative/Negative
Reservation timing Preset timing
MAC LC 640x480 MAC II 640x480 VESA 640x350 at 85 Hz
Dot Clock 31.334 MHz 30.2410 MHz 31.5 MHz
Horizontal frequency 34.97 KHz 35.0012 KHz 37.861 KHz
A-Period 28.598 µs (896 dots) 28.570 µs (894 dots) 26.413 µs (832 dots)
B-Blanking 8.171 µs (256 dots) 7.407 µs (224 dots) 6.095 µs (192 dots)
C-Sync Width 2.043 µs (64 dots) 2.803 µs (63 dots) 2.032 µs (64 dots)
D-Back Porch 2.426 µs (76 dots) 3.241 µs (98 dots) 3.048 µs (96 dots)
E-Active Time 20.425 µs (640 dots) 21.163 µs (640 dots) 20.317 µs (640 dots)
F-Front Porch 3.702 µs (116 dots) 2.083 µs (63 dots) 1.016 µs (32 dots)
Vertical frequency 66.61 Hz 66.6689 Hz 85.080 Hz
A-Period 15.013 ms (525 lines) 15.000 ms (525 lines) 11.754 ms (445 lines)
B-Blanking 1.287 ms (45 lines) 1.286 ms (45 lines) 2.509 ms (95 lines)
C-Sync Width 0.086 ms (3 lines) 0.086 ms (3 lines) 0.079 ms (2 lines)
D-Back Porch 1.115 ms (39 lines) 1.114 ms (39 lines) 1.585 ms (60 lines)
E-Active Time 13.726 ms (480 lines) 13.714 ms (480 lines) 9.244 ms (350 lines)
F-Front Porch 0.886 ms (3 lines) 0.086 ms (3 lines) 0.845 ms (32 lines)
Sync Polarity (H/V) Negative/Negative Sync on Green or Composite Positive/Negative