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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)： | 40/58頁 |
| 文件大?。?/td> | 551K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28
40
CHROMA STAGE
(RGB Mute:0 / RGB cut off:63 / DC rest.:10)
Note
Items/Symbols
C1
ACC Characteristics
/ V
ACCH
/ V
ACCL
Bus conditoins
RGB Mute:0
Y Mute:1
Uni-Color:127
Others:Preset
Measurement methods
(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 "V
ACCH
"/"V
ACCL
".
(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 "F
0T443
" / "Q
T443
".
(4)Set C-BPF to 0 and Color System to 010 and repeat (2)&(3),
that is "F
0B443
" / "Q
B443
".
(5)Set C-BPF to 1 and Color System to 100 and repeat (2)&(3),
that is "F
0T358
" / "Q
T358
".
(6)Set C-BPF to 0 and Color System to 100 and repeat (2)&(3),
that is "F
0B358
" / "Q
B358
".
C2
TOF Characteristics
(4.43MHz)
/ F
0T443
/ Q
T443
BPF Characteristics
(4.43MHz)
/ F
0B443
/ Q
B443
TOF Characteristics
(3.58MHz)
/ F
0T358
/ Q
T358
BPF Characteristics
(3.58MHz)
/ F
0B358
/ Q
B358
C Delay Time
/ t
CDEL
Delay Time
Difference between
Y/C
/
t
Y/C
Color Characteristics
/ G
COLMAX
/ G
COLMIN
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
C3
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 "t
CDEL
".
(3)Calculate;"
t
Y/C
"=t
YDEL
-t
CDEL
C4
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 V
COLMAX
/ V
COLCEN
/ V
COLMIN
.
(3)Calculate; "G
COLMAX
"=20*log(V
COLMAX
/V
COLCEN
)
"G
COLMIN
"=20*log(V
COLMIN
/V
COLCEN
)
(1) nput 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
V
UCCMAX
, and V
UCCMIN
.
(3) Calculate;"G
UCC
"=20*log(V
UCCMIN
/V
UCCMAX
)
(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
)
C5
Uni-Color
Characteristics for C
/ G
UCC
RGB Mute:0
Uni-Color:0/127
Y Mute:1
Others:Preset
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
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