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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： | 15/41页 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-22/41
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Tint variable range (+)
TINT+
21
C-1
Measure each part of the output level and
calculate the B-Y axis angle.
TINT+ = B-Y axis angle -TINCEN
TINT
1111111
Tint variable range (-)
TINT-
21
C-1
Measure each part of the output level and
calculate the B-Y axis angle.
TINT- = B-Y axis angle -TINCEN
TINT
0000000
[Filter Block Chroma BPF Characteristic]
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
C-BPF1A
Peaker amplitude
characteristic
3.93MHz
CBPF1A
21
C-3
PAL signal
Set the chroma frequency (CW) to
4.433619MHz-100kHz and measure V0 output
amplitude. And then, set the chroma frequency
(CW) to 3.93MHz and measure V1 output
amplitude to calculate as follows:
CBPF1A = 20LOG (V1/V0)
FILTER SYS = 0010
C.BYPASS = 0
C-BPF1B
Peaker amplitude
characteristic
4.73/4.13MHz
CBPF1B
21
C-3
PAL signal
Measure V2 output amplitude when the chroma
frequency (CW) is 4.13MHz and V3 output
amplitude when it (CW) is 4.73MHz to calculate
as follows:
CBPF1B = 20LOG (V3/V2)
FILTER SYS = 0010
C.BYPASS = 0
C-BPF1C
Peaker amplitude
characteristic
4.93/3.93MHz
CBPF1C
21
C-3
PAL signal
Set the chroma frequency (CW) to 4.93MHz and
measure V4 output amplitude to calculate as
follows:
CBPF1C = 20LOG (V4/V1)
FILTER SYS = 0010
C.BYPASS = 0
C-BPF2A
BandPass
amplitude
characteristic
3.93MHz
CBPF2A
21
C-3
PAL signal
Set the chroma frequency (CW) to
4.433619MHz-100MHz and measure V00 output
amplitude. And then, set the chroma frequency
(CW) to 3.93MHz and measure V10 output
amplitude to calculate as follows:
CBPF2A = 20LOG (V10/V00)
FILTER SYS = 0011
C.BYPASS = 0
C-BPF2B
BandPass
amplitude
characteristic
4.73/4.13MHz
CBPF2B
21
C-3
PAL signal
Measure V20 output amplitude when the chroma
frequency (CW) is 4.13MHz and V30 output
amplitude when it (CW) is 4.73MHz to calculate
as follows:
CBPF2B = 20LOG (V30/V20)
FILTER SYS = 0011
C.BYPASS = 0
C-BPF2C
BandPass
amplitude
characteristic
4.93/3.93MHz
CBPF2C
21
C-3
PAL signal
Set the chroma frequency (CW) to 4.93MHz and
measure V40 output amplitude to calculate as
follows:
CBPF2C = 20LOG (V40/V10)
FILTER SYS = 0011
C.BYPASS = 0
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