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)： 42/58頁(yè)
文件大?。?/td> 526K
代理商： TB1254N
Ver3.7
00/01/28 47
Note
Items/Symbols
Bus conditoins
Measurement methods
T14
Cross
Talk
from
Analog RGB to TV
/ CTTX-TV
RGB Mute:0
R cut off:63
DC rest.:10
Ysm Mode:1
Uni-color:127
RGB contrast:63
Others:Preset
(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 VTV.
(6) Supply 2V to Pin15.
(7) Measure the amplitude of 4MHz signal at Pin20, that is VTX.
(8) (8)Calculate;"CTTX-TV"=20*log(VTV/ VTX)
T15
Cross Talk from TV to
Analog RGB
/ CTTV-TX
RGB Mute:0
R cut off:63
DC rest.:10
Ysm Mode:1
Uni-color:127
RGB contrast:63
Others:Preset
(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 VTX.
(5) Supply 0V to Pin15.
(6) Measure the amplitude of 4MHz signal at Pin20, that is VTV.
(7) Calculate;"CTTV-TX"=20*log(VTX/ VTV)
T16
SECAM Black Level
Adj. Characteristics
/ VSECBMAX
/ VSECRMAX
/ VSECBMIN
/ VSECRMIN
SECAM Black Level
Adj. Data Sensitivity
/
VSECB
/
VSECR
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
(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 VSECBCEN / VSECRCEN.
(3)For B-Y Black Adj.:0/15, measure the DC level change of picture
period against VSECBCEN at Pin22, that is "VSECBMIN" / "VSECBMAX".
(4)For R-Y Black Adj.:0/15, measure the DC level change of picture
period against VSECRCEN at Pin20, that is "VSECRMIN" / "VSECRMAX".
(5)Calculate; "
VSECB"=(VSECBMAX-VSECBMIN)/16
"
VSECR"=(VSECRMAX-VSECRMIN)/16
T17
Base band TINT
characteristic
/ BBMAX
/ BBMIN
RGB Mute:0
R cut off:63
DC rest.:10
Uni-color:127
Others:Preset
(1)Input a signal(f0=100kHz, 100mVp-p) of NOTE T9 into
Pin44&38.
(2)Into 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
VR-G
VG-B
VB-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
RY/GY/BY.
(4)Supply Pin15 to 2V.
(5) Measure the DC level of picture period at Pin20,21,22, that is
RT/GT/BT.
(6)Calculate;
R RT RY
G GT GY
B BT BY
“
VR-G” R G
“
VG-B” G B
“
VB-R” B R
DEF STAGE
Note
Items/Symbols
Bus conditoins
Measurement methods
D1
AFC Inactive Period
/ T50AFCOFF
/ T60AFCOFF
All:Preset
(1)Input a 50Hz/60Hz composite sync signal into Pin38.
(2)Measure "T50AFCOFF" / "T60AFCOFF" at Pin29. (cf. Fig.D1)
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