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參數(shù)資料
| 型號： | TB1227CNG |
| 廠商： | Toshiba Corporation |
| 英文描述： | VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV |
| 中文描述： | 視頻，色度和同步信號處理集成電路的PAL / NTSC制式/ SECAM制式彩電 |
| 文件頁數(shù)： | 37/94頁 |
| 文件大?。?/td> | 1292K |
| 代理商： | TB1227CNG |
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TB1227CNG
2004-05-24
37
TEST CONDITION (Unless otherwise specified : H, RGB V
CC
= 9V ; V
DD
, Fsc V
DD
, Y / C V
CC
= 5V ; Ta = 25±3°C)
SUB-ADDRESS & BUS DATA
S
45
S
51
04H
08H
0FH
10H
13H
14H
(1) Set the 358 TRAP mode to AUTO by setting bus data.
SW MODE
S
42
S
44
NOTE
ITEM
S
39
MEASURING METHOD
Y
4
Chroma Trap
Attenuation (4.43MHz)
A
C
A
B
A
20H
04H
Vari-
able
Vari-
able
Vari-
able
03H
(2) Set the bus data so that Q of chroma trap is 1.5.
(3) Set the bus data so that f
0
of chroma trap is 0.
(4) Input TG7 sine wave signal whose frequency is 4.43MHz and video amplitude is
0.5V to pin 45 (Y
1
IN).
(5) Perform the same measurement as the steps 5 through 7 of the preceding item Y
3
.
The measurement result shall be expressed as Gtr4.
Y
5
Chroma Trap
Attenuation (SECAM)
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
(1) Set the bus data so that the 358 TRAP mode is AUTO and the Dtrap is ON.
(2) Set the bus data so that Q of chroma trap is 1.5.
(3) Set the bus data so that f
0
of chroma trap is 0.
(4) Input SECAM signal whose amplitude in video period is 0.5V to pin 45 (Y
1
IN).
(5) Perform the same measurement as the steps 5 through 7 of the preceding item Y
3
to find the maximum attenuation (Gtrs).
Y
6
Y
γ
Correction Point
↑
↑
↑
↑
↑
↑
Vari-
able
80H
00H BAH
↑
(1) Connect the power supply to pin 45 (Y
1
IN).
(2) Turn off Y
γ
by setting the bus data.
(3) While raising the supply voltage from the level
measured in the preceding item Y
1
, measure
voltage change characteristic of Y
1
output at pin
37.
(4) Set the bus data to turn on Y
γ
.
(5) Perform the same measurement as the above
step 3.
(6) Find a gamma (
) point from the measurement
results of the steps 3 and 5.
γ
p = Vr÷0.7V
Y
7
Y
γ
Correction Curve
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
From the measurement in the above item Y
6
, find gain of the portion that the
γ
correction has an effect on.
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