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): 74/94頁
文件大小: 1292K
代理商: TB1227CNG
TB1227CNG
2004-05-24
74
TEST CONDITION (Unless otherwise specified : H, RGB V
CC
= 9V ; V
DD
, Fsc V
DD
, Y / C V
CC
= 5V ; Ta = 25±3°C ; BUS = preset value)
SW MODE
SUB-ADDRESS & BUS DATA
S
22
S
31
S
33
S
34
S
51
S
45
S
39
S
44
NOTE
ITEM
S
21
MEASURING METHOD
T
24
DC Regeneration
B
B
A
B
B
A
B
A
A
(1) Short circuit pin 33 (B-Y IN) and pin 34 (R-Y IN) in AC coupling.
(2) Input such the step-up signal as shown below to pin 45 (Y IN) and
pin 51 (Sync IN).
(3) Connect pin 21 (Digital Ys) and pin 22 (Analog Ys) to ground.
(4) Set bus data so that contrast is maximum and DC transmission
correction factor is minimum.
(5) Adjust data on Y sub contrast so that video amplitude of pin 13
(G OUT) is 2.5V.
(6) While varying APL of the step-up signal from 10% to 90%,
measure change in voltage at the point A.
T
25
RGB Output S / N
Ratio
B
(1) Short circuit pin 31 (Y IN), pin 33 (B-Y IN) and pin 34 (R-Y IN) in
AC coupling.
(2) Input synchronizing signal of 0.3V in amplitude to pin 51 (Sync IN).
(3) Connect pin 21 (Digital Ys) and pin 22 (Analog Ys) to ground.
(4) Set bus data on contrast at maximum.
(5) Set bus data on Y sub contrast at center value.
(6) Measure video noise level of pin 13 (G OUT) with oscilloscope
(no).
SNo =
20
og (2.5 / (1 / 5) ×no)
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