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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)： | 48/58頁 |
| 文件大?。?/td> | 551K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28
48
Note
D2
Items/Symbols
H-OUT Start Voltage
/ V
HON
Bus conditoins
All:Preset
Measurement methods
(1)Let Pin1/14/37/42 be open.
(2)Increasing Pin31 voltage, measure the voltage at which H
OUT pulse appears at Pin32, that is "V
HON
".
D3
H-OUT Pulse Duty
/ W
HOUT
All:Preset
(1) Measure t
HOUT1
& t
HOUT2
at Pin32.
(2) Calculate;"W
HOUT
"=t
HOUT1
/(t
HOUT1
+t
HOUT2
)*100
D4
H-OUT Freq. on AFC
Stop Mode
/ F
HAFCOFF
Horizontal Free-run
Frequency
/ F
H50FR
/ F
H60FR
Horizontal
Variable Range
/ F
HMAX
/ F
HMIN
Horizontal
Control Sensitivity
/
HAFC
AFC
(OFF)
Others:Preset
V-Freq:001/010
Others:Preset
Gain:11
(1)Input a 50Hz composite sync signal into Pin38.
(2)Measure the H OUT frequency at Pin32, that is "F
HAFCOFF
".
D5
For V-Freq 001/010, measure the H OUT frequency at Pin32, that
is "F
H50FR
" / "F
H60FR
".
D6
Freq.
All:Preset
(1) Connect Pin29 to Vcc via a 10k
and measure the H OUT
frequency at Pin32, that is "F
HMAX
".
(2) Connect Pin29 to GND via a 68k
and measure the H OUT
frequency at Pin32, that is "F
HMIN
".
(1) Measure the Pin29 voltage at which H OUT frequency is
15.734kHz, that is V
H15734
.
(2) Measure the H OUT frequency when Pin29 voltage is V
H15734
+
50mV /V
H15734
- 50mV, that is F
HHIGH
/ F
HLOW
.
(3)Calculate;"
HAFC
"=(F
HHIGH
-F
HLOW
)/100
(1)Input a composite sync signal into Pin38.
(2)Decreasing the horizontal frequency from 17kHz, measure the
frequency at which H OUT synchronized with SCP Out(Pin29),
that is F
HPH
.
(3)Increasing the horizontal frequency from 14kHz, measure the
frequency at which H OUT synchronized with SCP Out(Pin29),
that is F
HPL
.
(4)Calculate; "
F
HPH
"=F
HPH
-15734
"
F
HPL
"=15625-F
HPL
(1)Measure the high level of H OUT at Pin32, that is "V
HOUTH
".
(2)Measure the low level of H OUT at Pin32, that is "V
HOUTL
".
D7
Freq.
All:Preset
D8
Horizontal Pull-in
Range
/
F
HPH
/
F
HPL
All:Preset
D9
H-OUT Voltage
/ V
HOUTH
/ V
HOUTL
Horizontal Freq.
Dependence on Vcc
/
F
HVCC
FBP Phase
/ PH
FBP
H-Sync. Phase
All:Preset
D10
All:Preset
(1)Measure the H OUT frequency when H Vcc(Pin31) is
8.5V/9.5V, that is F
HVCCH
/F
HVCCL.
(2)Calculate;"
F
HVCC
"=(F
HVCCH
-F
HVCCL
)/1
(1) nput a composite sync signal into Pin38.
(2) According to the following figure, measure "PH
FBP
" &
"PH
HSYNC
".
D11
/ PH
HSYNC
All:Preset
Sync in(Pin38)
H AFC(Pin29)
FBP in(Pin30)
t
HOUT1
t
HOUT2
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