
Visual Systems Division
Technical Bulletin
MultiSync
VT440/540 Installation Data
Desktop and Ceiling Mount
Rev. 1.5
Page 7
Timing Chart
Y/N
Signal
Resolution
Refresh Rate
Frequency H.
Dot Clock
( Dots )
( Hz )
( kHz )
( MHz)
Y
NTSC
640 x
480
60
15.734
–
Y
PAL
768 x
576
50
15.625
–
Y
SECAM
768 x
576
50
15.625
–
Y
VESA
640 x
480
59.94
31.47
25.175
Y
IBM
640 x
480
60
31.47
25.175
Y
MAC
640 x
480
60
31.47
25.175
Y
MAC
640 x
480
66.67
34.97
31.334
Y
MAC
640 x
480
66.67
35
30.24
Y
VESA
640 x
480
72.81
37.86
31.5
Y
VESA
640 x
480
75
37.5
31.5
Y
IBM
640 x
480
75
39.375
31.49
Y
VESA
640 x
480
85.01
43.269
36
Y
IBM
720 x
350
70.09
31.469
28.322
Y
VESA
720 x
400
85.04
37.927
35.5
Y
IBM
720 x
350
87.85
39.44
35.5
Y
IBM
720 x
400
87.7
39.375
35.5
Y
VESA
800 x
600
56.25
35.16
36
Y
VESA
800 x
600
60.32
37.879
40
Y
VESA
800 x
600
72.19
48.077
50
Y
VESA
800 x
600
75
46.88
49.5
Y
VESA
800 x
600
85.06
53.674
56.25
#Y
MAC
832 x
624
74.55
49.725
57.283
#Y
VESA
1024 x
768
43 Interlace
35.5
44.9
#Y
VESA
1024 x
768
60
48.363
65
#Y
VESA
1024 x
768
70.07
57.476
75
#Y
IBM
1024 x
768
72.03
58.131
79
#Y
MAC
1024 x
768
74.93
60.241
80
#Y
VESA
1024 x
768
75.03
60.023
78.75
#Y
VESA
1024 x
768
85
68.677
94.5
##Y
VESA
1152 x
864
75
67.5
108
##Y
MAC
1152 x
870
75.06
68.681
100
##Y
SUN
1152 x
900
65.95
61.796
92.94
##Y
SGI
1152 x
900
76.05
71.736
105.6
##Y
VESA
1280 x
960
60
60
108
##Y
SGI
1280 x
1024
60
63.9
107.35
##Y
VESA
1280 x
1024
60.02
63.981
108
##Y
MAC
1280 x
1024
60.38
64.31
107
##Y
MAC
1280 x
1024
65.2
69.9
118.5
##Y
HP
1280 x
1024
72.01
78.125
135
##Y
SUN
1280 x
1024
76.11
81.13
135
##Y
VESA
1280 x
1024
75.03
79.976
135
##Y
VESA
1280 x
1024
85.02
91.146
157.5
##Y
HDTV (1080i) 1920 x
1080
60 Interlace
33.75
74.25
##Y
HDTV (720p) 1280 x
720
60 Progr
45 74.
25
##Y
SDTV (480p) 720 x
483
59.94 Progr
31.47
27
#Y: Images in above flagged with # and Y are compressed with Advanced AccuBlend on VT440.
##Y: Images in above flagged with ## and Y are compressed with Advanced AccuBlend on VT540.
NOTE1:
Some composite sync signals may not be displayed correctly.
NOTE2:
Signals other than those specified in the table above may not be displayed correctly. If this should happen, change the refresh
rate or resolution on your PC. Refer to Display Properties help section of your PC for procedures.