STV2050A STMicroelectronics, STV2050A Datasheet - Page 38

• Manufacturer Part Number: STV2050A
• Description: IC DGTL CONVERGENCE PROC 80-PQFP
• Manufacturer: STMicroelectronics
• Type: Videor

Specifications of STV2050A

• Applications: HDTV
• Mounting Type: Surface Mount
• Package / Case: 80-MQFP, 80-PQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STV2050A - VIDEO PATTERN GENERATOR
Figure 20. Vertical Border Lines
No
7.5 GAIN ADJUSTMENT LINES
The “Gain Adjustment Lines” pattern is used mainly for 2 purposes:
– To calibrate the convergence currents in order to achieve a consistent geometrical correction
– To have an easy visual adjustment of the interlace mode.
The cursor has two different shapes, one for the adjustment of the vertical gain and another for
the adjustment of the horizontal gain.
The video pattern for the gain cursor is defined in the EA register.
7.5.1 Video Pattern for Horizontal Gain Cursor
The horizontal gain cursor can be used for adjusting the horizontal convergence channels.
The video pattern in the odd field is identical to the video pattern of the large cursor displayed
at the centre of the visible grid.
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on the screens of a series of PTVs,
te: The value of the BPV bit must be smaller than that of the VGD bit.
GCP
VHV
V-Gridlines
0: Gain cursor video pattern off
1: Gain cursor video pattern on
0: Horizontal gain cursor video pattern
1: Vertical gain cursor video pattern
11
12
10
11
12
0
1
2
3
4
5
6
7
8
9
0
1
BPV
BPV
Border Lines