|
TA1360AFG 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: VCC = 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 â VLDGOFF2 = A
VLDGOFF2 â VLDGOFF1 = B
GLDG = 20 Ã log [B/(B â A)]
#12 voltage [V]
VLDGMAX
VLDGOFF2
ON
VLDGMAX â VLDGOFF2 = A
VLDGOFF1
V68
OFF
VLGP
VLDGOFF2 â VLDGOFF1 = B
#68 voltage
V68 + 0.7 V
(100IRE)
55
2003-01-21
|
▷ |