
TB1230AN
2001-09-04
40
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
SW MODE
SUB-ADDRESS & BUS DATA
NOTE
ITEM
S39
S42
S44
S45
S51
04H
08H
0FH
10H
13H
14H
MEASURING METHOD
Y15
Picture Quality
Control Minimum
Characteristic
A
C
A
B
A
00H
04H
80H
00H
BAH
Vari-
able
(1)
In the condition of the Note Y14, set the picture quality control bus data to
minimum.
(2)
Perform the same measurement as the steps 3 through 8 of the Note Y14 to
find respective gains as the picture quality control frequency is set to 2.5MHz,
3.1MHz and 4.2MHz.
GS25MN = 20og (Vp25 / V100k)
GS31MN = 20og (Vp31 / V100k)
GS42MN = 20og (Vp42 / V100k)
Y16
Picture Quality
Control Center
Characteristic
↑
20H
↑
(1)
In the condition of the Note Y14, set the picture quality control bus data to
center.
(2)
Perform the same measurement as the steps 3 through 8 of the Note Y14 to
find respective gains as the picture quality control frequency is set to 2.5MHz,
3.1MHz and 4.2MHz.
GS25CT = 20og (Vp25 / V100k)
GS31CT = 20og (Vp31 / V100k)
GS42CT = 20og (Vp42 / V100k)
Y17
Y Signal Gain
↑
03H
(1)
Set the bus data so that black expansion is off, picture quality control is off and
DC transmission compensation is minimum.
(2)
Input TG7 sine wave signal whose frequency is 100kHz and video level is
0.5V to pin 45 (Y1 IN) and pin 51 (Sync. IN). (Vyi100)
(3)
Measure amplitude of Y1 output at pin 37 (Vyout).
Gy = 20og (Vyout / Vyi100)
Y18
Y Signal
Frequency
Characteristic
↑
(1)
Set the bus data so that black expansion is off, picture quality control is off and
DC transmission compensation is minimum.
(2)
Input TG7 sine wave signal whose frequency is 6MHz and video level is 0.5V
to pin 45 (Y1 IN) and pin 51 (Sync. IN). (Vyi6M)
(3)
Measure amplitude of Y1 output at pin 37 (Vyo6M).
Gy6M = 20og (Vyo6M / Vyi6M)
(4)
Find Gfy from the result of the Note Y17
Gfy = Gy6M Gy