TA1316AN Datasheet, PDF (62/115 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Parameter
P11 DC restoration gain
TA1316AN
Test Conditions
SW mode
SW1 SW2 SW3 SW56
Test Method (test conditions: V_CC = 9 V/2 V, Ta = 25° ± 3°C)
B
B
C
ON (1) Set picture mute to off (P-MODE: Normal1 (000)), DC restoration start point to minimum (000) and DC
restoration limit point (DC REST LIMIT) to 100% (11) and connect external power supply PS1 to pin 3.
(2) Measure DC level of pin 43 picture period. When use PS1 at V₃ as reference, Set PS1 to V₃ + 0.7 V and
adjust DC level to 0.7 V using UNI-COLOR.
(3) Set DC REST RATE to minimum (000) and measure V_DT1 and V_DT2 when pin 3 is at V₃ and at V₃ + 0.1 V
(see figure below).
(4) Measure V_DT3 when pin 3 is at V₃ + 0.1 V. Set DC REST RATE to maximum (111) and measure V_DT3.
(5) Set DC restoration rate switch (DCRR-SW) to 100% or less (1) and pin 3 to V₃ + 0.1 V, and measure V_DT4.
Set DC REST RATE to maximum (111) and measure V_DT4.
(6) Calculate ADT₁₀₀, ADT₁₃₅ and ADT₆₅ using the following formulae.
ADT₁₀₀ = (V_DT2 [V] − V_DT1 [V]) ÷ 0.1 [V]
ADT₁₃₅ = (V_DT3 [V] − V_DT1 [V]) ÷ 0.1 [V]
ADT₆₅ = 1 − {(V_DT2 [V] − V_DT4 [V]) ÷ 0.1 [V]}
V₃ [V]
Picture period
V_DT1
V₃ + 0.1 V
Pin 43 waveform
V_DT2 V_DT3
V_DT4
62
2002-10-04