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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)： | 50/58頁(yè) |
| 文件大?。?/td> | 551K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28
50
Note
D20
Items/Symbols
V. Ramp DC on
Service Mode
/ V
NOVRAMP
Vertical Pull-in Range
(Auto)
/ F
VPAUL
/ F
VPAUH
Vertical Pull-in Range
(50Hz)
/ F
VP50L
/ F
VP50H
Vertical Pull-in Range
(60Hz)
/ F
VP60L
/ F
VP60H
Vertical
Period
Fixed Mode
/ T
V3125
/ T
V2625
/ T
V313
/ T
V263
V-BLK Start Phase
/ PH
50VBLK
/ PH
60VBLK
V-BLK Width
/ W
50VBLK
Bus conditoins
V STOP:1
Others:Preset
Measurement methods
(1) Set V STOP to 1.
(2) Measure the DC level of Pin24, that is "V
NOVRAMP
".
D21
V-Freq:
000/001/010
Others:Preset
(6) Input a composite sync signal into Pin38.
(7) For V-Freq 000/001/010, increasing the input vertical period
from 220H by 0.5H step, measure the period at which input
signal synchronized with V Ramp(Pin24), that is "F
VPAUL
" /”
F
VP50L
”/ "F
VP60L
".
(8) (3)For V-Freq 000/001/010, decreasing the input vertical
period from 360H by 0.5H step, measure the period at which
input signal synchronized with V Ramp, that is "F
VPAUH
" /”
F
VP50H
”/ "F
VP60H
".
D22
on
V-Freq:
100/101/110/
111
Others:Preset
For V-Freq 100/101/110/111, measure the vertical period at SCP
out (Pin30), that is "T
V312.5
"/"T
V262.5
" / "T
V313
"/"T
V263
" .
D23
/ W
60VBLK
Sand Castle Pulse
Level
/ V
SCPH
/ V
SCPM
/ V
SCPL
All:Preset
(1)Input a 50Hz/60Hz composite sync signal into Pin38.
(2)Measure "T
50AFCOFF
" / "1T
60AFCOFF
" at Pin30. (cf. Fig.D25)
D24
All:Preset
Measure "V
SCPH
" / "V
SCPM
" / "V
SCPL
" at Pin30.
V
SCPL
V
SCPM
V
SCPH
D25
Vertical
Amplitude
/ V
VRAMP
Vertical AMP Gain
/ G
VAMP
Vertical AMP
Max.Output Level
/ V
VOMAX
Vertical AMP
Min.Output Level
Ramp
All:Preset
Measure the V Ramp amplitude at Pin24, that is "V
VRAMP
".
D26
/ V
VOMIN
All:Preset
(1)Let Pin26 be open.
(2)Changing the Pin25 DC voltage, measure "V
VOMAX
" / "V
VOMIN
" /
"G
VAMP
"
according to a following figure.
#26DC
V
VOMAX
V
VOMIN
(1)Supply 7V to Pin25.
(2)Measure the current from Pin26 to GND, that is "I
VOMAX
".
￠V=GVAMP
=20log(￠V#26/￠V#25)
#25DC
D27
Vertical
Max.Output Current
/ I
VOMAX
AMP
All:Preset
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