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TB1227CNG Datasheet(PDF) 50 Page - Toshiba Semiconductor |
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TB1227CNG Datasheet(HTML) 50 Page - Toshiba Semiconductor |
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50 / 94 page  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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