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參數(shù)資料
| 型號： | LA76810HA |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP54 |
| 封裝： | 0.600 INCH, DIP-54 |
| 文件頁數(shù)： | 10/41頁 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-18/41
[VIDEO SW block] Bus control bit conditions: Contrast = 63, Brightness = 63
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Video signal input
1DC voltage
VIN1DC
L-100
Input signals to pin 42 and measure the voltage
of the pedestal.
VIDEO SW: 1
Video signal input
2DC voltage
VIN2DC
L-100
Input signals to pin 44 and measure the voltage
of the pedestal.
VIDEO SW: 0
SVO terminal DC
voltage
SVODC
L-100
Input signals to pin 42 and measure the voltage
of the pedestal at pin 40.
VIDEO SW: 1
SVO terminal AC
voltage
SVOAC
L-100
Input signals to pin 42 and measure the voltage
of the pedestal at pin 40.
VIDE0 SW: 1
Chroma Block
Input Signals and Test Conditions
Unless otherwise specified, the following conditions apply when each measurement is made.
1. VIF, SIF blocks: No signal
2. Deflection Block: Horizontal/vertical composite sync signals are input and the deflection block must be locked into
the sync signals (Refer to the Deflection Block Input Signals and the Test Conditions).
3. Bus control conditions: Set the following conditions unless otherwise specified.
Y Input is 42 Pin (EXT-V IN),
C Input is 44 Pin (S-C IN)
(Video SW=1, C.Ext=1)
Other DAC except the above-mentioned conditions is all initial conditions.
4. Y Input condition: No signal unless otherwise specified.
(Sync is necessary to obtain synchronization).
5. How to calculate the demodulation ratio and angle:
B-Y axis angle = tan-1(B(0)/B(270))+270°
R-Y axis angle = tan-1(R(180)/R( 90))+90°
G-Y axis angle = tan-1(G(270)/G(180))+180°
B-Y axis amplitude Vb = SQRT(B(0)*B(0)+B(270)*B(270))
R-Y axis amplitude Vr = SQRT(R(180)*R(180)+R(90)*R(90))
G-Y axis amplitude Vg = SQRT(G(180)*G(180)+G(270)*G(270))
90
°
180
°
270
°
0
°
B(0)
R(90)
G(270)
R(180)
G(180)
B(270)
R-Y axis
B-Y axis
G-Y axis
42
44
40
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