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參數(shù)資料
| 型號： | TB1254N |
| 廠商： | Toshiba Corporation |
| 英文描述： | PAL / NTSC / SECAM 1CHIP (IF+VCD PROCESSOR) IC |
| 中文描述： | PAL / NTSC制式/ SECAM制式1CHIP（中頻光碟處理器）芯片 |
| 文件頁數(shù)： | 38/58頁 |
| 文件大?。?/td> | 551K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28
38
Note
V9
Items/Symbols
Uni-Color
Characteristics for Y
/ G
UCYMAX
/ G
UCYCEN
/ G
UCYMIN
Bus conditoins
Uni-
Color:0/64/127
Color:0
RGB Mute:0
R cut off:63
DC rest.:10
Others:Preset
Sub-Contrast:
0/8/15
Uni-Color:127
Color:0
RGB Mute:0
R cut off:63
DC rest.:10
Others:Preset
Sharpness:63
Uni-Color:127
Color:0
RGB Mute:0
R cut off:63
DC
Others:Preset
Sharpness:0/32/6
3
Uni-Color:127
Color:0
RGB Mute:0
R cut off:63
DC
Others:Preset
Measurement methods
(1)Input a 50IRE white signal with sync into Pin38&39.
(2)Measure the output picture amplitude at Pin20 for Uni-
Color:127/64/0, that is V
UCYMAX
/ V
UCYCEN
/ V
UCYMIN
.
(3)Calculate; "G
UCYMAX
"=20*log(V
UCYMAX
/0.357)"
"G
UCYCEN
"=20*log(V
UCYCEN
/0.357)
"G
UCYMIN
"=20*log(V
UCYMIN
/0.357)
V10
Sub-Contrast
Characteristics
/ G
SCONMAX
/ G
SCONMIN
(1)Input a 50IRE white signal with sync into Pin38&39.
(2)Measure the output picture amplitude at Pin20 for Sub-
Contrast 15/8/0,
that is VSCONMAX / VSCONCEN / VSCONMIN.
(3)Calculate; "G
SCONMAX
"=20*log(V
SCONMAX
/V
SCONCEN
)
"G
SCONMIN
"=20*log(V
SCONMIN
/V
SCONCEN
)
V11
Sharpness
Frequency
/ F
SHP
Peaking
rest.:10
(1)Input a 0.5Vp-p sweep signal with sync into Pin38&39.
(2)Measure the frequency at which the Pin20 output amplitude is
Max., that is "F
SHP
".
V12
Sharpness
Characteristics
/ GSHMAX
/ GSHCEN
/ GSHMIN
Control
rest.:10
(1)Input a 0.5Vp-p sweep signal with sync into Pin38&39.
(2)Measure the output picture amplitude for 100kHz at Pin20, that
is V
SH100k
.
(3)Measure the output picture amplitude for FSHP when
Sharpness is max.,center and min., that is V
SHMAX
, V
SHCEN
and
V
SHMIN
.
(4)Calculate; "G
SHMAX
"=20*log(V
SHMAX
/V
SH100k
)
"G
SHCEN
"=20*log(V
SHCEN
/V
SH100k
)
"G
SHMIN
"=20*log(V
SHMIN
/V
SH100k
)
(1) nput a gray raster with sync to Pin38&39.
(2) Set BUS data so that
point is 90IRE.
(3) ncreasing a video amplitude of input from 50IRE, measure a
video ampitude as the figure below, that is “V
Y
90
”
(4) Set BUS data so that
point is 80IRE.And repeat (3), that is
“V
Y
80
”.
(5) Set BUS data so that
point is 70IRE.And repeat (3), that is
“V
Y
70
”.
(6) From the measurement in the above, find gain of the portion
that the
correction has an effect on.
#20
output
V13
Y
correction start
point
/ V
Y
70
/ V
Y
80
/ V
Y
90
Y
correction curve
/ G
Y
Uni-Color:127
Color:0
RGB Mute:0
R cut off:63
DC rest.:10
point:01/10/11
Others:Preset
Y á=off
Y á=90/80/70IRE
#39 input
V
Yá90
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