Planar PDP 42 - Manual (Page 51)

It is optimal screen when the resolution is 640 x 480.
5 1
If any signal of unsupported resolution is input, the "Out of Range" message appears.
Considerations in Installation
Supporting display mode
Resolution Horizontal Frequency (KHz) Vertical Frequency (Hz)
31.47 60
37.86 72
37.50 75
31.47 70
35.15 56
37.88 60
48.88 72
46.88 75
48.36 60
56.48 70
60.02 75
640 480
720 400
800 600
1024 768