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參數(shù)資料
| 型號(hào)： | 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)： | 8/41頁 |
| 文件大?。?/td> | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-16/41
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
L-50
Measure the output signal’s 50IRE amplitude
(CNTCB Vp-p).
L-0
O-2
Measure the OSD output amplitude
(OSDHB Vp-p).
Pin 17: 3.5V
Pin 16A: O-2
applied
Blue RGB output
level
BOSDC
Calculate BOSDC = 50
× (OSDHB/CNTCB)
Analog OSD R output
level
L-0
O-1
Measure the amplitudes at point A (0.35V portion
of the input signal 0-1) and point B (0.7V portion
of the input signal 0-1) of the output signal.
Assign the measured values to RGBLR Vp-p and
RGBHR Vp-p, respectively.
Pin 17 : 3.5V
Pin 14A : O-1
applied
Gain match
RRGB
Calculate RRGB = RGBLR/CNTCR.
linearity
LRRGB
Calculate LRRGB = 100
× (RGBLR/RGBHR).
Analog OSD G output
level
L-0
O-1
Measure the amplitudes at point A (0.35V portion
of the input signal 0-1) and point B (0.7V portion
of the input signal 0-1) of the output signal.
Assign the measured values to RGBLG Vp-p and
RGBHG Vp-p, respectively.
Pin 17: 3.5V
Pin 15A: O-1
applied
Gain match
GRGB
Calculate GRGB = RGBLG/CNTCG.
linearity
LGRGB
Calculate LGRGB = 100
× (RGBLG/RGBHG).
Analog OSD B output
level
L-0
O-1
Measure the amplitudes at point A (0.35V portion
of the input signal 0-1) and point B (0.7V portion
of the input signal 0-1) of the output signal.
Assign the measured values to RGBLB Vp-p and
RGBHB Vp-p, respectively.
Pin 17: 3.5V
Pin 16A: O-1
applied
Gain match
BRGB
Calculate BRGB = RGBLB/CNTCB.
linearity
LBRGB
Calculate LBRGB = 100
× (RGBLB/RGBHB).
[RGB output block] (Cutoff, drive block) Bus control bit conditions: Contrast=127
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Measure the 0IRE DC levels of the respective
output signals of R output (19), G output (20), and
B output (21). Assign the measured values to
BRTPCR, BRTPCG, and BRTPCB V, respectively.
Brightness:
01111111
Brightness control
(normal)
BRT63
L-0
Calculate BRT63 = (BRTPCR+BRTPCG+
BRTPCB)/3.
Measure the 0IRE DC level of the output signal of
B output (21) and assign the measured value to
BRTPHB.
Brightness:
1111111
(max)
BRT127
Calculate BRT127 = 50
× (BRTPHB-BRTPCB)/
CNTHB.
Measure the 0IRE DC level of the output signal of
B output (21) and assign the measured value to
BRTPLB.
Brightness:
0000000
(min)
BRT0
Calculate BRT0 = 50
× (BRTPLB-BRTPCB)/
CNTHB.
Continued on next page.
20
19
21
20
19
21
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