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Typical Input Signal Timing
Resolution
Horizontal Frequency
(A) Horizontal Period
(B) Horizontal Pulse Width
(C)Horizontal Back Porch
(D) Horizontal Active Area
(E) Hrizontal Front Porch
640~ 350
31.469KHz
31.778µsec
3.813µsec
1.589µsec
26.058µsec
0.318µsec
720~ 400
31.469KHz
31.778µsec
3.813µsec
1.589µsec
26.058µsec
0.318µsec
720~ 350
39.444KHz
25.352µsec
3.042µsec
1.522µsec
20.282µsec
0.508µsec
640~ 480
31.469KHz
31.778µsec
3.813µsec
1.589µsec
26.058µsec
0.318µsec
720~ 400
39.444KHz
25.352µsec
3.042µsec
1.522µsec
20.282µsec
0.508µsec
640~ 480
39.375KHz
25.397µsec
3.048µsec
1.524µsec
20.317µsec
0.508µsec
Mac U , Quadra,
or LC Compatible
VGA Compatible
640~ 480
35.000KHz
28.570µsec
2.120µsec
3.170µsec
22.810µsec
0.180µsec
XGA-2 Compatible
Resolution
Horizontal Frequency
(A) Horizontal Period
(B) Horizontal Pulse Width
(C)Horizontal Back Porch
(D) Horizontal Active Area
(E) Horizontal Front Porch
640~ 480
37.860KHz
26.413µsec
1.270µsec
4.063µsec
20.317µsec
0.762µsec
VESA
640~ 480
at 72Hz
VESA
800~ 600
at 56Hz
800~ 600
35.156KHz
28.444µsec
2.000µsec
3.556µsec
22.222µsec
0.667µsec
1024~ 768
48.363KHz
20.677µsec
2.092µsec
2.462µsec
15.754µsec
0.369µsec
VESA
1024~ 768
at 60Hz
1024~ 768
35.587KHz
28.100µsec
3.910µsec
1.247µsec
22.760µsec
0.178µsec
8514/A & XGA
Interlaced
Compartible
832~ 624
49.725KHz
20.111µsec
1.117µsec
3.910µsec
14.524µsec
0.559µsec
MAC U
&
Quadra
800~ 600
48.077KHz
20.800µsec
2.400µsec
1.280µsec
16.000µsec
1.120µsec
VESA
800~ 600
at 72Hz
800~ 600
37.879KHz
26.400µsec
3.200µsec
2.200µsec
20.000µsec
1.000µsec
VESA
800~ 600
at 60Hz
*VGA, XGA, XGA-2, and 8514/A are the trademarks of International Business Machines Corporation.
*Macintosh II, Quadra, and LC are the trademarks of Apple Computer Inc.
*VESA is the trademark of a non-profit organization, Video Electronics Standards Association.
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