參數(shù)資料
型號(hào)： TB1254N
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝： 0.600 INCH, PLASTIC, SDIP-56
文件頁(yè)數(shù)： 33/58頁(yè)
文件大小： 526K
代理商： TB1254N
Ver3.7
00/01/28 39
Note
Items/Symbols
Bus conditoins
Measurement methods
V14
Black Expansion Start
Point
/ VBLEX25
/ VBLEX35
/ VBLEX45
Black Expansion AMP
Gain
/ GBLEX
Uni-Color:127
Color:0
Black
stretch:00/01
/10/11
RGB Mute:0
R cut off:63
DC rest.:10
Others:Preset
(1)Input a gray raster with sync to Pin38&39.
(2)Set black stretch to 25IRE.
(3)Decreasing Y amplitude of input from 50IRE, measure a Y
amplitude as the figure below, that is “VBLEX25”
(4)Set black stretch to 35IRE/45IRE.
(5)Repeat (3), that is ‘VBLEX35”, “VBLEX45”. below, that is “VY
90”
(6)Find gain of the portion that the black stretch has an effect on.
Black
stretch
=off
25/35/45IRE
#39 input
#20
output
V
BLEX25
V16
DC Restration Gain
/ VDcrest120
/ VDcrest90
/ VDcrest step
Uni-Color:127
Color:0
Black
stretch:00/01
/10/11
RGB Mute:0
R cut off:63
DC rest.:10
Others:Preset
(1)Input a 100IRE signal with sync into Pin38&39.
(2)Set DC rest. to 10.
(3)Measure a Y amplitude of pin20 output, that is V100.
(4)Set DC rest to 00.
(5)Measure a Y amplitude of pin20 output, that is V120.
(6)Calculate, “Vdcrest120” =(V120/V100)×100
(7)Set DC rest to 11.
(8)Repeat (5)&(6), that is “VDcrest90”.
(9)Calculate, “VDcrest step”=(Vdcrest120 - VDcrest90)/4
V17
WPS Level
/ VWPS
Uni-Color:127
Brightness:127
Color:0
RGB Mute:0
R cut off:63
DC rest.:10
Others:Preset
(1)Input a 120IRE ramp signal with sync into Pin38&39.
(2)Measure the amplitude from cut-off level to peak(at which
output signal is clipped), that is "VWPS".
V18
Chroma Trap Gain
/ GTRAP
C-Trap:0/1
Uni-Color:127
Color:0
RGB Mute:0
R cut off:63
DC
rest.:10
Others:Preset
(1)Input a 0.5Vp-p, 3.58MHz signal with sync into Pin43&39.
(2)Measure the 3.58MHz amplitude at PIn20 for Chroma
Trap:1/0, that is VTRAPON / VTRAPOFF.
(3)Calculate;"GTRAP"=20*log(VTRAPON/VTRAPOFF)
V19
Half
Tone
Characteristics for Y
/ GHTY
Ysm Mode:0
Uni-Color:127
Color:0
RGB Mute:0
R cut off:63
DC rest.:10
Others:Preset
(1)Input a 100IRE white signal with sync into Pin38&39.
(2)Measure the output picture amplitude at PIn20 , that is
VHTYOFF.
(3)Suppry Pin15 2V.
(4) Measure the output picture amplitude at PIn20 , that is VHTYON
.
(3)Calculate;"GHTY"=20*log(VHTYON/VHTYOFF)
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