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TB1227CNG Datasheet(PDF) 50 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) 50 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
50
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
SW MODE
NOTE
ITEM
S26
S1
S31
S33
S34
S39
S42
S44
S45
S51
MEASURING METHOD
C12
Color
Difference
Output
ON
A
B
B
B
A
A
A
A
B
(1) Activate the test mode (S26-ON, Sub Add 02 ; 08h).
(2) Connect band pass filter (Q = 2), set to TV mode (fo = 600kHz) with 0dB attenuation.
(3) Set the crystal mode to conform to European, Asian system and set the gate to normal
status.
(4) Input 3N, 4N and 4P rainbow color bar signals having 100mVp-p burst to pin 42 of the
chroma input terminal one after another.
(5) Measure amplitudes of color difference signals of pin 36 (B-Y) and pin 35 (R-Y)
respectively, and express them as 3NeB-Y / R-Y, 4NeB-Y / R-Y and 4PeB-Y / R-Y
respectively.
(6) While inputting 4P 75% color bar signal (100mVp-p burst) to pin 42 of the chroma input
terminal, measure amplitudes of color difference signals of pin 36 (B-Y OUT) and pin 35
(R-Y OUT) respectively. (Ratio of those amplitudes is expressed as 4Peb-y / r-y for
checking color level of SECAM system.)
C13
Demodulation
Relative
Amplitude
(1) Activate the test mode (S26-ON, Sub Add 02 ; 08h).
(2) Connect band pass filter (Q = 2), set to TV mode (fo = 600kHz) with 0dB attenuation.
(3) Set the crystal mode to conform to European, Asian system and set the gate to normal
status.
(4) Input 3N, 4N and 4P rainbow color bar signals having 100mVp-p burst to pin 42 of the
chroma input terminal one after another.
(5) Measure amplitudes of color difference signals of pin 36 (B-Y) and pin 35 (R-Y)
respectively, and express ratio between the two amplitudes as 3NG R / B, 4NG R / B
and 4PG R / B respectively.
(Note)
Relative amplitude of G-Y color difference signal shall be checked later in the
Text section.


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