參數(shù)資料
型號(hào)： 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(hào)處理集成電路的PAL / NTSC制式/ SECAM制式彩電
文件頁數(shù)： 40/94頁
文件大?。?/td> 1292K
代理商： TB1227CNG
TB1227CNG
2004-05-24
40
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 bus data so that picture quality control frequency is 2.5MHz.
SW MODE
S
42
S
44
NOTE
ITEM
S
39
MEASURING METHOD
Y
13
Picture Quality Control
Peaking Frequency
A
C
A
B
A
3FH
04H
80H
00H BAH
Vari-
able
(2) Input TG7 sine wave (sweeper) signal whose video level is 0.1V to pin 45 (Y
1
IN)
and pin 51 (Sync. IN).
(3) Maximize the picture quality control data.
(4) While observing Y
1out
of pin 37, find an SG frequency as the waveform amplitude
is maximum (fp25).
(5) Set the bus data so that picture quality control frequency is 3.1MHz and 4.2MHz,
and perform the same measurement as the above steps 2 through 4 at the
respective frequencies (fp31, fp42).
Y
14
Picture Quality Control
Maximum
Characteristic
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
(1) Input TG7 sine wave (sweeper) signal whose video level is 0.1V to pin 45 (Y
1
IN)
and pin 51 (Sync. IN).
(2) Set the picture quality control data to maximum.
(3) Set the picture quality control frequency is 2.5MHz by setting the bus data.
(4) Measure amplitude (V100k) of the output of pin 37 (Y
1
OUT) as the SG frequency
is 100kHz, and the amplitude (Vp25) of the same as the SG frequency is 2.5MHz.
GS25MX = 20
og (Vp25 / V100k)
(5) Set the picture quality control frequency data to 3.1MHz by setting the bus data.
(6) Measure amplitude (V100k) of the output of pin 37 (Y
1
OUT) as the SG frequency
is 100kHz, and the amplitude (Vp31) of the same as the SG frequency is 3.1MHz.
GS31MX = 20
og (Vp31 / V100k)
(7) Set the picture quality control frequency to 4.2MHz by setting the bus data.
(8) Measure amplitude (V100k) of the output of pin 37 (Y
1
OUT) as the SG frequency
is 100kHz, and the amplitude (Vp42) of the same as the SG frequency is 4.2MHz.
GS42MX = 20
og (Vp42 / V100k)
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