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參數資料
型號: LA76818A
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: 22/44頁
文件大小: 289K
代理商: LA76818A
LA76818A
No.8047-29/44
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus conditions
Horizontal position
adjustment maximum
variable width
HPHstep
27
42
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
@0
BLKL0
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
27
42
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
Blue OUT
Hsync
Y IN
T
Blue OUT
Hsync
Y IN
T
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