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)： 45/58頁
文件大?。?/td> 551K
代理商： TB1254N
Ver3.7
00/01/28
45
TEXT STAGE
(RGB Mute:0 / RGB cut off:63 / DC rest.:10)
Note
Items/Symbols
T1
V-BLK Pulse Output
Level
/ V
VBLK
H-BLK Pulse Output
Level
Bus conditoins
All:Preset
Measurement methods
(1)Input a cmposite sync signal into Pin38.
(2)Measure the DC level of V/H blanking period at Pin20, that is
"V
VBLK
" / "V
HBLK
".
/ V
HBLK
RGB Output Black
Level (0IRE DC)
/ V
BLACK
T2
RGB Mute:0
Color:0
R cut off:63
DC rest.:10
Others:Preset
RGB Mute:0
R cut off:63
DC rest.:10
Uni-Color:127
Color:0
Others:Preset
RGB Mute:0
DC rest.:10
B Cut Off:0/255
Color:0
Others:Preset
RGB Mute:0
DC rest:10
B Drive:0/127
Uni-Color:127
Color:0
Others:Preset
RGB Mute:0
R cut off:63
DC rest.:10
ABL Gain:11
Uni-Color:127
Color:0
Others:Preset
RGB Mute:0
R cut off:63
DC rest.:10
ABL Start Point:
00/01/10/11
ABL Gain:11
Uni-Color:127
Color:0
Others:Preset
RGB Mute:0
R cut off:63
DC rest.:10
ABL Gain:
00/01/10/11
Uni-Color:127
Color:0
Others:Preset
(1)Input a 0IRE Y signal with sync into Pin38&39.
(2)Measure the DC level of picture period at Pin20, that is "V
BLACK
".
T3
RGB Output White
Level(100 IRE AC)
/ V
WHITE
(1)Input a 100IRE Y signal with sync into Pin38&39.
(2)Measure the amplitude from 0 to 100IRE at Pin20, that is
"V
WHITE
".
T4
Cut-off Voltage
Variable Range
/
V
CUT+
/
V
CUT-
(1)Input a 0IRE Y signal with sync into Pin38&39.
(2)Measure the DC level of picture period at Pin22 for B Cut-
off:255/0 , that is
V
CUTMAX
/ V
CUTMIN
.
(3)Calculate; "
V
CUT+
"=V
CUTMAX
-V
BLACK
"
V
CUT
-"=V
CUTMIN
-V
BLACK
(1)Input a 100IRE Y signal with sync into Pin38&39.
(2)Measure the amplitude from 0 to 100IRE at Pin20 for B
drive127/0, that is
V
DRMAX
/ V
DRMIN
.
(1)
Calculate; "G
DR+
"=20*log(V
DRMAX
/V
WHITE
)
"G
DR-
"=20*log(V
DRMIN
/V
WHITE
)
(1)Input a 100IRE Y signal with sync into Pin38&39.
(2)Decreasing the Pin28 voltage, measure the voltage at which
Pin20 output
begins/stops decreasing, that is "V
ABCLH
" / "V
ABCLL
".
(3)Measure the minimum amplitude of Pin20 output, that is V
ACLMIN
.
(4)Calculate; "G
ACL
"=20*log(V
ACLMIN
/V
WHITE
)
T5
Drive Control Variable
Range
/ G
DR+
/ G
DR-
T6
ABCL Contorol
Voltage Range
/ V
ABCLH
/ V
ABCLL
ACL Gain
/ G
ACL
ABL Start Point
/ V
ABLP0
/ V
ABLP1
/ V
ABLP2
/ V
ABLP3
T7
(1)Input a 0IRE Y signal with sync into Pin38&39.
(2)For ABL Point 00/01/10/11, decreasing the Pin28 voltage,
measure the
voltage at which Pin20 output begins decreasing, that is
V
ABL1
/V
ABL2
/V
ABL3
/V
ABL4
.
(3)Calculate; "V
ABLP0
"=V
ABL1
-V
ABCLH
"V
ABLP1
"=V
ABL2
-V
ABCLH
"V
ABLP2
"=V
ABL3
-V
ABCLH
"V
ABLP3
"=V
ABL4
-V
ABCLH
(1)Input a 0IRE Y signal with sync into Pin38&39.
(2)For ABL Gain 00/01/10/11, measure the DC level of picture
period at
Pin20
when
Pin28
voltage
V
ABL5
/V
ABL6
/V
ABL7
/V
ABL8
.
(3)Calculate; "V
ABLG0
"=V
ABL5
-V
BLACK
"V
ABLG1
"=V
ABL6
-V
BLACK
"V
ABLG2
"=V
ABL7
-V
BLACK
"V
ABLG3
"=V
ABL8
-V
BLACK
T8
ABL Gain
/ V
ABLG0
/ V
ABLG1
/ V
ABLG2
/ V
ABLG3
is
V
ABCLL
,
that
is
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