參數(shù)資料
型號(hào): TB1261F
元件分類(lèi): 消費(fèi)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(yè)數(shù): 36/66頁(yè)
文件大?。?/td> 1538K
代理商: TB1261F
TB1261F/TB1262F
2002-6-30 41 / 66
CHROMA STAGE
CHROMA STAGE (RGB Mute:0 / RGB cut off:128 / DC rest.:2(100%))
Note
Items/Symbols
Bus conditions
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(300mV(p-p),
burst:chroma=1:1) with sync into Pin61.
(2) Changing the amplitude of burst and chroma, measure the
input amplitude at which Pin51 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
Measure on test
mode
s;21,d;00010000
s;1A,d;xx00xxxx
BPF/TOF :0/1
Color System:
2/4
F-ID =1
C-in sw= 1 (c in)
Others: Preset
(1) Set “BPF/TOF” to 1, “Color System” to 4(443PAL).
(2) Input a sweep signal into Pin #61 and #58.
(3) Observe the frequency response at Pin34 and measure the
Peaking Frequency / Q of chroma filter, that is "F0T443" /
"QT443".
(4) Set BPF/TOF to 0 and Color System to 4(443PAL) and
repeat (2)&(3), that is "F0B443" / "QB443".
(5) Set BPF/TOF to 1 and Color System to 2(358NTSC) and
repeat (2)&(3), that is "F0T358" / "QT358".
(6) Set BPF/TOF to 0 and Color System to 2(358NTSC) and
repeat (2)&(3), that is "F0B358" / "QB358".
C3
C Delay Time
/ tCDEL
Delay Time Difference
between Y/C
/ ΔtY/C
Others: Preset
(1) Input a 4.43MHz PAL rainbow color-bar(300mV(p-p),
burst:chroma=1:1) with sync into Pin61.
(2) Observe the Pin51 output, measure the delay time between
Pin61 and Pin51 that is "tCDEL".
(3) Calculate;"ΔtY/C"=tYDEL-tCDEL
C4
APC Pull-in Range
(4.43MHz)
/ ΔF4APCP+
/ ΔF4APCP-
APC Hold Range
(4.43MHz)
/ ΔF4APCH+
/ ΔF4APCH-
APC Pull-in Range
(3.58MHz)
/ ΔF3APCP+
/ ΔF3APCP-
APC Hold Range
(3.58MHz)
/ ΔF3APCH+
/ ΔF3APCH-
Color System:
4/2
Others: Preset
(1) Input a 4.43MHz PAL rainbow color-bar(300mV(p-p),
burst:chroma=1:1) with sync into Pin61.
(2) Set Color System to 4(443PAL).
(3) For higher frequency than 4.43MHz, measure the burst
frequency at which PLL pulls-in / locks out that is F4APCP+ /
F4APCH+.
(4) For lower frequency than 4.43MHz, repeat (2), that is
F4APCP- / F4APCH-.
(5) Calculate;
"ΔF4APCP+"= F4APCP+ - 4433619
"ΔF4APCP-"= F4APCP- - 4433619
"ΔF4APCH+"=F4APCH+-4433619
"ΔF4APCH-"=F4APCH- - 4433619
(6) Input a 3.58MHz NTSC rainbow color-bar (286mV(p-p),
burst:chroma=1:1) with sync into Pin61 and 58.
(7) Set Color System to 2(358NTSC).
(8) For higher frequency than 3.58MHz, repeat (2), that is
F3APCP+ / F3APCH+.
(9) For lower frequency than 3.58MHz, repeat (2), that is
F3APCP- / F3APCH-.
(10) Calculate;
"ΔF3APCP+"=F3APCP+-3579545
"ΔF3APCP-"=3579545-F3APCP-
"ΔF3APCH+"=F3APCH+-3579545
"ΔF3APCH-"=3579545-F3APCH-
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