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參數(shù)資料
| 型號： | TB1261F |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 39/66頁 |
| 文件大小： | 1538K |
| 代理商： | TB1261F |
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TB1261F/TB1262F
2002-6-30 44 / 66
YUV STAGE
YUV STAGE (RGB Mute:0 / RGB cut off:128 / DC rest.:2(100%))
Note
Items/Symbols
Bus
Bus conditions
conditions
Measurement methods
Y1
Brightness Control
/ VBRTMAX
/ VBRTCEN
/ VBRTMIN
Brightness Control
resolution
/ ΔVBRT
Brightness:
0/64/127
Color:0
RGB Mute:0
R cut off:128
DC rest.:2(100%)
Others: Preset
(1) Input a 0(IRE) black signal with sync into Pin61.
(2) Measure the DC level of picture period at Pin14 for
Brightness:127/64/0, that is "VBRTMAX" / "VBRTCEN" /
"VBRTMIN".
(3) Calculate;"ΔVBRT"=(VBRTMAX-VBRTMIN)/127
Y2
Contrast Control for Y
/ GUCYMAX
/ GUCYCEN
/ GUCYMIN
Uni-Color:0/64/1
27
Color:0
RGB Mute:0
R cut off:128
DC rest.:2(100%)
WPS:1(OFF)
Others: Preset
(1)Input a PAL color bar (75%) signal with sync into Pin61.
(2)Measure the output picture amplitude at Pin14 for
contrast:127/64/0, that is VUCYMAX / VUCYCEN / VUCYMIN.
(3)Calculate; "GUCYMAX"=20*log(VUCYMAX/0.35)
"GUCYCEN"=20*log(VUCYCEN/0.35)
"GUCYMIN"=20*log(VUCYMIN/0.35)
Y3
Sharpness Control
/ GSHMAX
/ GSHCEN
/ GSHMIN
Sharpness:0/32/6
3
Uni-Color:64
Color:0
RGB Mute:0
R cut off:128
DC rest.:2(100%)
Others: Preset
(1)Input a 0.5V(p-p) sweep signal with sync into Pin61.
(2)Measure the output picture amplitude for 100kHz at Pin14
that is VSH100k.
(3)Measure the output picture amplitude for FSHP when
Sharpness is max.,center and min. that are VSHMAX, VSHCEN and
VSHMIN.
(4)Calculate; "GSHMAX"=20*log(VSHMAX/VSH100k)
"GSHCEN"=20*log(VSHCEN/VSH100k)
"GSHMIN"=20*log(VSHMIN/VSH100k)
Y4
Sharpness
Peaking
Frequency
/ FSHP
Sharpness:63
Uni-Color:63
Color:0
RGB Mute:0
R cut off:128
DC rest.:2(100%)
Coring=0/1
Others: Preset
(1) Input a 0.5V(p-p) sweep signal with sync into Pin61.
(2) Set the IICBUS switch of coring to 1
(3) Measure the frequency at which the Pin14 output amplitude
is Max. that is "FSHP".
(4) Set the IICBUS switch of coring to 0
(5) Measure the frequency at which the Pin14 output amplitude
is Max. that is "FSHPoff".
GCOR
=20*log( FSHPoff / FSHP )
Y5
Y
γ
correction
start point
/ VY
γ 70
/ VY
γ 80
/ VY
γ 90
Y
γ
correction
curve
/ GY
γ
Uni-Color:127
Color:0
RGB Mute:0
R cut off:128
DC rest.:2(100%)
γ
point:0/1/2/3
WPS:1(OFF)
Others: Preset
(1) Input a gray raster with sync to Pin61.
(2) Set BUS data so that γ point is 90IRE.
(3) Increasing a video amplitude of input from 50(IRE),
measure a video amplitude as the figure below, that is “VY
γ
90”
(4) Set BUS data so that γ point is 80IRE.And repeat (3), that
is “VYγ 80”.
(5) Set BUS data so that γ point is 70IRE.And repeat (3), that
is “VYγ 70”.
(6) From the measurement in the above,
find gain of the
portion that the γ correction has an effect on.
Y
γ=off
Y
γ=90/80/70IRE
#61 input
#14 output
V
Yγ90
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