TA1310ANG Datasheet, PDF (38/106 Pages) Toshiba Semiconductor – NTSC VIDEO, CHROMA, DEFLECTION, AND DISTORTION COMPENSATION IC (WITH YUV INTERFACE AND ACB)

TA1310ANG
NOTE
ITEM
SW MODE
SW₅₄ SW₅₅ SW₅₆
1)
2)
3)
4)
5)
6)
P₁₂ Black Stretching Start Point C
B
↓ OPEN
A
(TEST CONDITIONS V_CC = 9 V / 5 V, Ta = 25 ± 3°C)
MEASUREMENT METHOD
Set the bus control data to the preset value.
Set SW₅₄ to C (connect the Y input to AC-GND), set SW₅₅ to B (minimum gain), turn the Y mute off (0), and set
the black stretch start point to 001.
Connect #54 to an external power supply (PS), increase the voltage from V₅₄, and plot the resulting change in
voltage S₁ of #56.
Next, set SW₅₅ to A (maximum gain). Then, increase the voltage from V₅₄ as in 3) above and plot the resulting
change in voltage S₂ of #56.
Now set the black stretch point to 111 and plot S₃ as in 3) above.
Use the diagram below to calculate the intersection V_B001 of S₁ and S₂, and the intersection V_B111 of S₁ and S₃.
Use the following formals to calculate P_B001 and P_B111, and calculate P_B001 and P_B111 from the formulas below.
P_B001 [(IRE)] = ((V_B001 [V] − V₅₆ [V] ÷ 0.7 [V]) × 100 [(IRE)]
P_B111 [(IRE)] = ((V_B111 [V] − V₅₆ [V] ÷ 0.7 [V]) × 100 [(IRE)]
Note 1: When testing, see the picture sharpness test circuit diagram. First turn ACB mode off (bus control).
Note 2: Ensure the composite signal is always input to pin 38 (SYNC IN).
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2005-09-20