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参数资料
| 型号： | LA76810HA |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP54 |
| 封装： | 0.600 INCH, DIP-54 |
| 文件页数： | 6/41页 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-14/41
Video Block Test Conditions
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Video overall gain
(Contrast max)
CONT127
L-50
Measure the output signal’s 50IRE amplitude
(CNTHB Vp-p) and calculate
CONT127 = 20Log (CNTHB/0.357).
CONTRAST:
1111111
Contrast
adjustment
characteristics
(normal/max)
CONT63
L-50
Measure the output signal’s 50IRE amplitude
(CNTCB Vp-p) and calculate
CONT63 = 20Log (CNTCB/0.357).
CONTRAST:
0111111
Contrast
adjustment
characteristics
(min/max)
CONT0
L-50
Measure the output signal’s 50IRE amplitude
(CNTLB Vp-p) and calculate
CONT0 = 20Log (CNTLB/0.357).
CONTRAST:
0000000
Video frequency
Characteristics 1
(SVHS)
BW1
L-CW
With the input signal’s continuous
wave = 100kHz, measure the output signal’s
continuous wave amplitude (PEAKDC Vp-p).
With the input signal’s continuous
wave = 6MHz, measure the output signal’s
continuous wave amplitude (CW7 Vp-p).
Calculate BW1 = 20Log (CW6/PEAKDC).
FILTER SYS: 0100
SHARPNESS:
000000
Video frequency
Characteristics 2
(PAL)
BW2
L-CW
With the input signal’s continuous
wave = 3.2MHz, measure the output signal’s
continuous wave amplitude (CW3.2 Vp-p).
Calculate BW2 = 20Log (CW3.2/PEAKDC).
FILTER SYS: 0010
SHARPNESS:
000000
Video frequency
Characteristics 3
(NTSC)
BW3
L-CW
With the input signal’s continuous
wave = 2.6MHz, measure the output signal’s
continuous wave amplitude (CW2.6 Vp-p).
Calculate BW3 = 20Log (CW2.6/PEAKDC).
FILTER SYS: 0000
SHARPNESS:
000000
Video frequency
Characteristics 4
(SECAM)
BW4
L-CW
With the input signal’s continuous
wave = 3.1MHz, measure the output signal’s
continuous wave amplitude (CW3.1 Vp-p).
Calculate BW4 = 20Log (CW3.1/PEAKDC).
FILTER SYS: 1000
SHARPNESS:
000000
With the input signal’s continuous
wave = 4.43MHz, measure the output signal’s
continuous wave amplitude (F0P Vp-p).
FILTER SYS: 010
Sharpness: 000000
Chroma trap amount
PAL
CtraPP
L-CW
Calculate CtraP = 20Log (F0P/PEAKDC).
With the input signal’s continuous
wave = 3.58MHz, measure the output signal’s
continuous wave amplitude (F0N Vp-p).
FILTER SYS: 000
Sharpness: 000000
Chroma trap amount
NTSC
CtraPN
L-CW
Calculate CtraN = 20Log (F0N/PEAKDC).
L-0
Measure the output signal’s 0IRE DC level
(BRTPL V).
Brightness:
0000000
CONTRAST:
1111111
DC transmission
amount
ClampG1
L-100
Measure the output signal’s 0IRE DC level
(DRVPH V) and 100IRE amplitude (DRVH Vp-p)
and calculate ClampG = 100
×
(1+(DRVPH - BRTPL)/DRVH).
Brightness:
0000000
Contrast:
1111111
Y-DL TIME1(SVHS)
TdY1
L-50
Obtain the time difference (the delay time) from
when the rise of the input signal's 50IRE
amplitude to the output signal's 50IRE amplitude.
FILTER SYS:0100
Y-DL TIME2(PAL)
TdY2
L-50
Obtain the time difference (the delay time) from
when the rise of the input signal's 50IRE
amplitude to the output signal's 50IRE amplitude.
FILTER SYS:0010
Y-DL TIME3(NTSC)
TdY3
L-50
Obtain the time difference (the delay time) from
when the rise of the input signal's 50IRE
amplitude to the output signal's 50IRE amplitude.
FILTER SYS:0000
Y-DL TIME4(SECAM)
TdY4
L-50
Obtain the time difference (the delay time) from
when the rise of the input signal's 50IRE
amplitude to the output signal's 50IRE amplitude.
FILTER SYS:1000
Continued on next page.
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