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TB1227CNG Datasheet(PDF) 52 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) 52 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
52
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
C16
Demodulation
Output Residual
Higher Harmonic
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 and 4N rainbow color bar signals having 100mVp-p burst to pin 42 of the
chroma input terminal one after another.
(5) Measure higher harmonic (2fc = 7.16MHz or 8.87MHz) of 3N and 4N color bar signals
appearing in color difference signals of pin 36 (B-Y OUT) and pin 35 (R-Y OUT)
respectively, and express them as 3N-HCB / R and 4N-HCB / R.
C17
Color Difference
Output ATT
Check
(1) Activate the test mode (S26-ON, Sub Add 02 ; 08h).
(2) Connect band pass filter (Q = 2) and set bus data for the TV mode (fo = 600kHz).
(3) Set the X’tal clock mode to conform to European, Asian system and set the gate to
normal status.
(4) Input 3N rainbow color bar signal whose burst is 100mVp-p to pin 42 of the chroma input
terminal.
(5) Measure amplitude of color difference output signal of pin 36 (B-Y OUT) with 0dB
attenuation set by the bus control. Set the amplitude of the color difference output of pin
36 (B-Y OUT) to 0dB, and measure amplitude of the same signal with different
attenuation of −2dB, −1dB and +1dB set by the bus control.


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