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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： | 18/41页 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-25/41
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Horizontal position
adjustment maximum
variable width
HPHstep
Y IN:
Horizontal/
vertical sync
signal
PAL
With H PHASE: 0 to 31 varied, measure the delay
time from to the rise of the pin 27 horizontal
output pulse to the fall of the Y IN horizontal sync
signal and calculate the variation at each step.
Retrieve data for maximum variation.
H PHASE: 00000
to
H PHASE: 11111
POR circuit operating
voltage
VPOR
Y IN:
Horizontal/
vertical sync
signal
PAL
Connect a DC power supply in place of the
current source to pin 25 and gradually decrease
the voltage from 5.0V until the BUS READ
TATUS [POR][STATUS1 (DA01) becomes "1".
Measure the DC voltage at pin 25 at the moment.
Horizontal blanking
left variable range@0
BLKL0
Y IN:
Horizontal/
vertical sync
signal
PAL
Measure the time T from the left end of Hsync at
pin 42 Y IN to the left end of blanking at pin 21
BlueOUT with BLKL = 000.
BLKL: 000
Horizontal blanking
left variable range@7
BLKL7
Y IN:
Horizontal/
vertical sync
signal
PAL
Measure the time T from the left end of Hsync at
pin 42 Y IN to the left end of blanking at pin 21
BlueOUT with BLKL = 111.
BLKL: 111
Continued on next page.
Measuring
HPHCEN
20IRE
Horizontal output
42
27
Blue
Hsync
Y IN
T
Blue
Hsync
Y IN
T
42
21
25
42
21
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