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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： | 7/41页 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-15/41
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Measure the 0IRE DC level (BKST1 V) at point A
of the output signal in the Black Stretch Defeat
(Black Stretch OFF) mode.
Measure the 0IRE DC level (BKST2 V) at point A
of the output signal in the Black Stretch ON
mode.
Blk Str DEF: 0
Maximum black
stretch gain
BKSTmax
L-BK
Calculate BKSTmax=2
×50× (BKST1-BKST2)
/CNTHB.
Measure the 60IRE DC level (BKST3 V) of the
output signal in the Black Stretch Defeat ON
mode.
Blk Str DEF: 0
Measure the 60IRE DC level (BKST4 V) of the
output signal in the Black Stretch Defeat (Black
Stretch OFF) mode.
Black stretch
threshold
black
(60IRE
black)
BKSTTH
L-60
Calculate BKSTTH
= 50×
(BKST4-BKST3)/CNTHB.
Sharpness
variability
characteristics
With the input signal’s continuous
wave = 2.2MHz, measure the output signal’s
continuous wave amplitude (F00S31 Vp-p).
FILTER SYS:0000
Sharpness: 100000
(normal)
Sharp31
L-CW
Calculate Sharp31 = 20Log (F00S31/PEAKDC).
With the input signal’s continuous
wave = 2.2MHz, measure the output signal’s
continuous wave amplitude (F00S63 Vp-p).
FILTER SYS:0000
Sharpness: 111111
(max)
Sharp63
L-CW
Calculate Sharp63=20Log (F00S63/PEAKDC).
With the input signal’s continuous
wave=2.2MHz, measure the output signal’s
continuous wave amplitude (F00S0 Vp-p).
FILTER SYS:0000
Sharpness: 000000
(min)
Sharp0
L-CW
Calculate Sharp0 = 20Log (F00S0/PEAKDC).
Horizontal/vertical
blanking output
level
RGBBLK
L-100
Measure the DC level (RGBBLK V) for the output
signal’s blanking period.
[OSD block] Bus control bit conditions: Contrast = 63, Brightness = 63
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
OSD
Fast SW threshold
FSTH
L-0
O-2
Apply voltage to pin 17 and measure the voltage
at pin 17 at the point where the output signal
switches to the OSD signal.
Pin 16A: O-2
applied
L-50
Measure the output signal’s 50IRE amplitude
(CNTCR Vp-p).
L-0
O-2
Measure the OSD output amplitude
(OSDHR Vp-p).
Pin 17: 3.5V
Pin 14A: O-2
applied
Red RGB output
level
ROSDC
Calculate ROSDC = 50
× (ROSDC /CNTCR)
L-50
Measure the output signal’s 50IRE amplitude
(CNTCG Vp-p).
L-0
O-2
Measure the OSD output amplitude
(OSDHG Vp-p).
Pin 17: 3.5V
Pin 15A: O-2
applied
Green RGB output
level
GOSDC
Calculate GOSDC = 50
× (GOSDC/CNTCG)
Continued on next page.
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