參數(shù)資料
型號： TB1254N
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝： 0.600 INCH, PLASTIC, SDIP-56
文件頁數(shù)： 35/58頁
文件大小： 526K
代理商： TB1254N
Ver3.7
00/01/28 40
CHROMA STAGE (RGB Mute:0 / RGB cut off:63 / DC rest.:10)
Note
Items/Symbols
Bus conditoins
Measurement methods
C1
ACC Characteristics
/ VACCH
/ VACCL
RGB Mute:0
Y Mute:1
Uni-Color:127
Others:Preset
(1)Input a 4.43MHz PAL rainbow color-bar(300mVp-p,
burst:chroma=1:1) with sync into Pin38&43.
(2)Changing the amplitude of burst and chroma, measure the input
amplitude at which Pin20 output amplitude is +1dB/-1dB against
the one for 300mVp-p input, that is "VACCH"/"VACCL".
C2
TOF Characteristics
(4.43MHz)
/ F0T443
/ QT443
BPF Characteristics
(4.43MHz)
/ F0B443
/ QB443
TOF Characteristics
(3.58MHz)
/ F0T358
/ QT358
BPF Characteristics
(3.58MHz)
/ F0B358
/ QB358
RGB Mute:0
Y Mute:1
TEST:01000111
C-BPF:0/1
Color System:
010/100
TEST Mode:
00001000
Sub Add.”0A”:
X0011XXX
Others:Preset
(1)Set “C-BPF” to 1, “Color System” to 010, “TEST Mode” to
00001000, and Sub address “0A” is X0011XXX.
(2)Input a sweep signal into Pin43.
(3)Observe the frequency response at Pin13 and measure the
Peaking Frequency / Q of chroma filter, that is "F0T443" / "QT443".
(4)Set C-BPF to 0 and Color System to 010 and repeat (2)&(3),
that is "F0B443" / "QB443".
(5)Set C-BPF to 1 and Color System to 100 and repeat (2)&(3),
that is "F0T358" / "QT358".
(6)Set C-BPF to 0 and Color System to 100 and repeat (2)&(3),
that is "F0B358" / "QB358".
C3
C Delay Time
/ tCDEL
Delay Time
Difference between
Y/C
/
tY/C
RGB Mute:0
Y Mute:1
Uni-Color:127
Others:Preset
(1)Input a 4.43MHz PAL rainbow color-bar(300mVp-p,
burst:chroma=1:1) with sync into Pin38&43.
(2)Observe the Pin20 output, measure the delay time between
Pin43 and Pin20, that is "tCDEL".
(3)Calculate;"
tY/C"=tYDEL-tCDEL
C4
Color Characteristics
/ GCOLMAX
/ GCOLMIN
RGB Mute:0
Color:0/64/127
Y Mute:1
Uni-Color:127
Others:Preset
(1)Input a 4.43MHz PAL rainbow color-bar(300mVp-p,
burst:chroma=1:1) with sync into Pin38&43.
(2)Measure the Pin20 amplitude for Color 127/64/0, that is VCOLMAX
/ VCOLCEN/ VCOLMIN.
(3)Calculate; "GCOLMAX"=20*log(VCOLMAX/VCOLCEN)
"GCOLMIN"=20*log(VCOLMIN/VCOLCEN)
C5
Uni-Color
Characteristics for C
/ GUCC
RGB Mute:0
Uni-Color:0/127
Y Mute:1
Others:Preset
(1)Input a 4.43MHz PAL rainbow color-bar(300mVp-p,
burst:chroma=1:1) with sync into Pin38&43.
(2)Measure the Pin20 amplitude for Uni-Color 127/0, that is
VUCCMAX, and VUCCMIN.
(3)Calculate;"GUCC"=20*log(VUCCMIN/VUCCMAX)
C6
Tint Characteristics
(3.58MHz)
/
358MAX
/
358MIN
Tint Characteristics
(4.43MHz)
/
443MAX
/
443MIN
RGB Mute:0
Tint:0/64/127
Y Mute:1
Uni-Color:127
Others:Preset
(1)Input a 3.58MHz NTSC rainbow color-bar (286mVp-p,
burst:chroma=1:1) with sync into Pin38&43.
(2)Set Tint to 64 and adjust the burst phase so that the 6th bar of
Pin20 output is maximum, that is
358CEN.
(3)Change Tint to 127/0 and adjust the burst phase so that the 6th
bar of Pin20 output is maximum, that is
358MAX /358MIN.
(4)Calculate; "
358MAX"=-(358MAX-358CEN)
"
358MIN"=-(358MIN-358CEN)
(5)Input a 4.43MHz NTSC rainbow color-bar (286mVp-p,
burst:chroma=1:1) with sync into Pin43 and repeat (2)&(3), that is
443CEN /443MAX /443MIN.
(7)Calculate; "
443MAX"=-(443MAX-443CEN)
"
443MIN"=-(443MIN-443CEN)
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