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TB1227CNG Datasheet(PDF) 41 Page - Toshiba Semiconductor

Part No. TB1227CNG
Description  VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB1227CNG Datasheet(HTML) 41 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
41
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 = 20ℓog (Vp25 / V100k)
GS31MN = 20ℓog (Vp31 / V100k)
GS42MN = 20ℓog (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
and4.2MHz.
GS25CT = 20ℓog (Vp25 / V100k)
GS31CT = 20ℓog (Vp31 / V100k)
GS42CT = 20ℓog (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 = 20ℓog (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 = 20ℓog (Vyo6M / Vyi6M)
(4) Find Gfy from the result of the Note Y17.
Gfy = Gy6M − Gy


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