TA1360AFG_05 Datasheet, PDF (53/110 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Characteristics
P12 Dark area static 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 OFF [03].
3. Set PS1 to V₆₈ [V], and measure #12 picture period voltage VSGOFF1 [V].
4. Set PS1 to VDGP [V], and measure #12 picture period voltage VSGOFF2 [V].
5. Set dark area static Yγ gain [1C] to MAX [1F], PS1 to VDGP [V], measure #12 picture period voltage
VSGMAX, and calculate GDSGMAX using the following equations.
VSGMAX − VSGOFF2 = A
VSGOFF2 − VSGOFF1 = B
GDSGMAX = 20 × log [B/(B - A)] [dB]
#12 voltage [V]
ON
VSGMAX
VSGOFF2
OFF
VSGMAX − VSOFF2 = A
VSGOFF1
V₆₈ VDGP
#68 voltage [V]
V₆₈ + 0.7 V
(100IRE)
6. Set dark area static Yγ gain [1C] to MIN [07], PS1 to VDGP [V], measure #12 picture period voltage VSGMIN,
and calculate GDSGMIN using the following equation.
GDSGMIN = 20 × log [(VSGMIN − VSGOFF1)/(VSGOFF2 − VSGOFF1)] [dB]
#12 voltage [V]
OFF
VSGOFF2
ON
VSGMIN
VSGOFF1
V₆₈ VDGP
53
VSGOFF2 − VSGOFF1
VSGMIN − VSGOFF1
#68 voltage [V]
V₆₈ + 0.7 V
(100IRE)
2005-08-18