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| 型號(hào)： | TB1230AN |
| 元件分類(lèi)： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP56 |
| 封裝： | 0.600 INCH, 1.78 MM PITCH, SHRINK, PLASTIC, DIP-56 |
| 文件頁(yè)數(shù)： | 30/90頁(yè) |
| 文件大?。?/td> | 1333K |
| 代理商： | TB1230AN |
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TB1230AN
2001-09-04
36
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
Y4
Chroma Trap
Attenuation
(4.43MHz)
A
C
A
B
A
20H
04H
Vari-
able
Vari-
able
Vari-
able
03H
(1) Set the 358 TRAP mode to AUTO by setting bus data.
(2) Set the bus data so that Q of chroma trap is 1.5.
(3) Set the bus data so that f0 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 (Y1 IN).
(5) Perform the same measurement as the steps 5 through 7 of the preceding item
Y3. The measurement result shall be expressed as Gtr4.
Y5
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 f0 of chroma trap is 0.
(4) Input SECAM signal whose amplitude in video period is 0.5V to pin 45 (Y1 IN).
(5) Perform the same measurement as the steps 5 through 7 of the preceding item
Y3 to find the maximum attenuation (Gtrs).
Y6
Yγ Correction
Point
↑
Vari-
able
80H
00H
BAH
↑
(1) Connect the power supply to pin 45 (Y1 IN).
(2) Turn off Yγ by setting the bus data.
(3) While raising the supply voltage from the level
measured in the preceding item Y1, measure
voltage change characteristic of Y1 output at
pin 37.
(4) Set the bus data to turn on Yγ
(5) Perform the same measurement as the above
step 3.
(6) Find a gamma (γ) point from the measurement results of the steps 3 and 5.
γp = Vr÷0.7
Y7
Yγ Correction
Curve
↑
From the measurement in the above item Y6, find gain of the portion that the γ
correction has an effect on.
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| TB1238N | 制造商:TOSHIBA 制造商全稱(chēng):Toshiba Semiconductor 功能描述:PAL/NTSC 1CHIP (IF+VCD PROCESSOR) IC |
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