TA1360AFG_05 Datasheet, PDF (55/110 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Characteristics
P14 Light 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
A OPEN 1. Connect external power supply PS1 to #68, external power supply PS2 to TP7, and set PS2 to 1.2 V.
2. Set dark area static Yγ gain [1C] to 0dB [17], and light area static Yγ gain [1C] to 0dB [17].
3. Set PS1 to V₆₈ [V], and measure #12 picture period voltage VLDGOFF1.
4. Set PS1 to VLGP [V], and measure #12 picture period voltage VLDGOFF2.
5. Set light area static Yγ gain [1C] to MAX [14], PS2 to 0 V, PS1 to VLGP [V], determine #12 picture period
voltage VLDGMAX [V] using the following equations.
VLDGMAX − VLDGOFF2 = A
VLDGOFF2 − VLDGOFF1 = B
GLDG = 20 × log [B/(B − A)]
#12 voltage [V]
VLDGMAX
VLDGOFF2
ON
VLDGOFF1
V₆₈
OFF
VLGP
VLDGMAX − VLDGOFF2 = A
VLDGOFF2 − VLDGOFF1 = B
#68 voltage
V₆₈ + 0.7 V
(100IRE)
55
2005-08-18