TA1316AN Datasheet, PDF (56/115 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Parameter
P04 Black stretch start point 2
TA1316AN
Test Conditions
SW mode
SW1 SW2 SW3 SW56
Test Method (test conditions: V_CC = 9 V/2 V, Ta = 25° ± 3°C)
B
A
A
ON (1) Set black stretch start point 1 to off (000), picture mute to off (P-MODE: Normal1 (000)) and apply 0 V to #1.
Input TG7 linearity to TPA, adjust amplitude using pin 3 as shown below, set UNI-COLOR to center
(1000000), then measure pin 43 (R OUT) amplitude V_P43.
(2) Set black stretch start point 1 to 001 (black stretch on), connect external power supply (PS) to pin 56 and
monitor pin 43 (R OUT).
(3) When black stretch start point 2 data is a minimum (00), determine black stretch start point differential ∆V₀₀
for PS = V₅₆ (APL = 0%) and for PS = V₅₆ + 1.0 V (APL = 100%), as shown below. (Using oscilloscope,
adjust input waveform so that amplitude (gradient) is same as that of output waveform in VAR. Compare
waveforms and determine point where output waveform bends.)
(4) When black stretch start point 2 data is a maximum (11), determine black stretch start point differential ∆V₁₁
as in (3) above.
(5) Calculate using the following formulae.
P_BS1 = (∆V₀₀/V_P43) × 100
P_BS2 = (∆V₁₁/V_P43) × 100
LINEARITY
0.7 V_p-p
0.3 V_p-p
Pin 3 waveform (linear)
APL 100%
APL 0%
∆V_***
Pin 43 (R OUT)
56
2002-10-04