User Guide

NOTE
Video Timing Requirements
HORIZONTAL
Scanning Frequency
Front Porch
Sync Width
Back Porch
Blanking Time
VERTICAL
Scanning Frequency
Front Porch
Sync Width
Sync Width + Back Porch
30 to Y5kHz (HM-4721-D)
30 to 87kHz (HM-4787-D)
0.1 to 0.4ps
less than 15% of Horizontal Period (1 /Scanning
Frequency)
more than 1.15~s
more than 2.4~s (+l)
50 to 152Hz
5 to loops
10 to loop
400 to 7OOp at 50 to 80Hz Vertical Scanning
Frequency
400 to 5OOps at 80 to 120Hz Vertical Scanning
Frequency
400 to 45Ous at 120 to 152Hz Vertical Scanning
Frequency
(W If is recommended more tharr 2.6~s Ilorizonfal blarlking the to avoid leff side
rasfer ringing.
To obtain fill1 screen size pirtwr. lrorizorrfal blurking time should be in fhe runp uf
Fig. 4.1.
30 40
50
60 70 80
90 100
110
Horizontal Frequency (kHz)
Fig. 4.1 Horizontal Blanking Time
E-23