TA1360AFG_05 Datasheet, PDF (52/110 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Characteristics
P11 Dark area dynamic Yγ gain
TA1360AFG
Test Conditions
SW Mode
SW71 SW70 SW68 SW64 SW74
Test Method (Test condition: V_CC = 9 V/2 V, Ta = 25 ± 3°C)
A
B
C
B OPEN 1. Connect external power supply PS1 to #68, external power supply PS2 to TP1, and set PS2 to 0 V.
2. Set dark area dynamic Yγ gain [1C] to MIN [03], and dark area static Yγ gain [1C] to 0dB [17].
3. Set PS1 to V₆₈ [V], and measure #12 picture period voltage VDDGV₆₈ [V].
Set PS1 VDGP [V], and measure #12 picture period voltage VDDGMIN [V].
4. Set dark area dynamic Yγ gain [1C] to MAX [D7], PS2 to 1.2 V, measure voltage VDDGMAX [V] of #12
picture period when PS1 is VDGP [V], and calculate the following equations.
VDDGMAX − VDDGMIN = A
VDDGMIN − VDDGV₆₈ = B
GDDGMAX = 20 log [B/(B-A)] [dB]
#12 voltage [V]
ON
VDDGMAX
VDDGMIN
VDDGV₆₈
V₆₈ VDGP
OFF
VDDGMAX − VDDGMIN = A
VDDGMIN − VDDGV₆₈ = B
#68 voltage [V]
V₆₈ + 0.7 V
(100IRE)
52
2005-08-18