參數(shù)資料
型號(hào)： 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(yè)數(shù)： 47/58頁(yè)
文件大小： 551K
代理商： TB1254N
Ver3.7
00/01/28
47
Note
T14
Items/Symbols
Cross
Analog RGB to TV
/ CT
TX-TV
Bus conditoins
RGB Mute:0
R cut off:63
DC rest.:10
Ysm Mode:1
Uni-color:127
RGB contrast:63
Others:Preset
Measurement methods
(1) Input a composite sync signal into Pin38.
(2) Connect Pin39 to GND via a 1uF capacitor.
(3) Input a sine wave signal (f=4MHz, Video amplitude=0.5Vp-p)
into Pin16.
(4) Supply 0V to Pin15.
(5) Measure the amplitude at Pin20, that is V
TV
.
(6) Supply 2V to Pin15.
(7) Measure the amplitude of 4MHz signal at Pin20, that is V
TX
.
(8) (8)Calculate;"CT
TX-TV
"=20*log(V
TV
/ V
TX
)
(1) Input a sine wave signal (f=4MHz, Video amplitude=0.5Vp-p)
with sync into Pin38&39.
(2) Connect Pin16 to GND via a 0.1uF capacitor.
(3) Supply 2V to Pin15.
(4) Measure the amplitude at Pin20, that is V
TX
.
(5) Supply 0V to Pin15.
(6) Measure the amplitude of 4MHz signal at Pin20, that is V
TV
.
(7) Calculate;"CT
TV-TX
"=20*log(V
TX
/ V
TV
)
(1) Set S black monitor to 1.
(2)For B-Y/R-Y Black Adj.:8, measure the DC level of picture period
at Pin22/20, that is V
SECBCEN
/ V
SECRCEN
.
(3)For B-Y Black Adj.:0/15, measure the DC level change of picture
period against V
SECBCEN
at Pin22, that is "V
SECBMIN
" / "V
SECBMAX
".
(4)For R-Y Black Adj.:0/15, measure the DC level change of picture
period against V
SECRCEN
at Pin20, that is "V
SECRMIN
" / "V
SECRMAX
".
(5)Calculate; "
V
SECB
"=(V
SECBMAX
-V
SECBMIN
)/16
"
V
SECR
"=(V
SECRMAX
-V
SECRMIN
)/16
Talk
from
T15
Cross Talk from TV to
Analog RGB
/ CT
TV-TX
RGB Mute:0
R cut off:63
DC rest.:10
Ysm Mode:1
Uni-color:127
RGB contrast:63
Others:Preset
T16
SECAM Black Level
Adj. Characteristics
/ V
SECBMAX
/ V
SECRMAX
/ V
SECBMIN
/ V
SECRMIN
SECAM Black Level
Adj. Data Sensitivity
/
V
SECB
/
V
SECR
Base band TINT
characteristic
/
BBMAX
/
BBMIN
RGB Mute:0
R cut off:63
DC rest.:10
Color
System:111 B-Y
Black Adj:
0/8/15
R-Y Black Adj:
0/8/15
S black monitor:1
Others:Preset
RGB Mute:0
R cut off:63
DC rest.:10
Uni-color:127
Others:Preset
T17
(1) nput a signal(f0=100kHz, 100mVp-p) of NOTE T9 into
Pin44&38.
(2) nto Pin45, into a signal with the same amplitude but 90deg
phase advanced compared to the signal input to pin44.
(3) When baseband TINT is changed ‘10000’ to“00000”, measure
the amount of change in the output phase of Pin20, that is
“
BBMIN
”.
(4) When baseband TINT is changed ‘10000’ to“11111”, measure
the amount of change in the output phase of Pin20, that is
“
BBMIN
”.
T18
Analog RGB
RGB
Output Voltage Axes
Difference
V
R-G
V
G-B
V
B-R
RGB Mute:0
R/G/B cut off:63
Brightness:63
DC rest.:10
Color:0
Uni-color:127
Others:Preset
(1)Input a 0IRE signal with sync into Pin38&39.
(2)Connect Pin16,17,18 to GND via 0.01
F.
(3)Measure the DC level of picture period at Pin20,21,22, that is
R
Y
/G
Y
/B
Y.
(4)Supply Pin15 to 2V.
(5) Measure the DC level of picture period at Pin20,21,22, that is
R
T
/G
T
/B
T.
(6)Calculate;
R
R
T
R
Y
G
G
T
G
Y
B
B
T
B
Y
“
V
R-G
”
R
G
“
V
G-B
”
G
B
“
V
B-R
”
B
R
DEF STAGE
Note
D1
Items/Symbols
AFC Inactive Period
/ T
50AFCOFF
/ T
60AFCOFF
Bus conditoins
All:Preset
Measurement methods
(1)Input a 50Hz/60Hz composite sync signal into Pin38.
(2)Measure "T
50AFCOFF
" / "T
60AFCOFF
" at Pin29. (cf. Fig.D1)
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