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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： | 17/41页 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-24/41
Deflection Block
Test Conditions
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Horizontal free-running
frequency
fH
Y IN:
No signal
Connect a frequency counter to the output of pin
27 (H out) and measure the horizontal
free-running frequency.
Horizontal pull-in range
fH PULL
YIN:
Horizontal/
vertical sync
signal
PAL
Using an oscilloscope, monitor the horizontal
sync signal which is input to the Y IN (pin 42) and
the pin 27 output (H out) and vary the horizontal
signal frequency to measure the pull-in range.
Horizontal output
pulse length
Hduty
Y IN:
Horizontal/
vertical sync
signal
PAL
Measure the voltage for the pin 27 horizontal
output pulse’s low-level period.
Horizontal output pulse
saturation voltage
V Hsat
Y IN:
Horizontal/
vertical sync
signal
PAL
Measure the voltage for the pin 27 horizontal
output pulse’s low-level period.
Vertical free-running
period 50 (PAL)
Vertical free-running
period 60 (NTSC)
VFR50
VFR60
Y IN:
No signal
Measure the vertical output period T at pin 18
T
×15.625kHz (PAL)
T
×15.734kHz (NTSC)
CDMODE: 001
(PAL)
CDMODE: 002
(NTSC)
Horizontal output pulse
HPHCEN
(PAL)
(NTSC)
Y IN:
Horizontal/
vertical sync
signal
PAL
NTSC
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.
Horizontal position
adjustment range
HPHrange
Y IN:
Horizontal/
vertical sync
signal
PAL
With H PHASE: 0 and 31, measure the delay time
from the rise of the pin 27 horizontal output pulse
to the fall of the Y IN horizontal sync signal and
calculate the difference from H PHCEN.
H PHASE: 00000
H PHASE: 11111
Continued on next page.
27
42
27
23
42
27
42
27
HPHCEN
20IRE
2.5V
Horizontal output
T
2.5V
Vertical output
Measuring
HPHCEN
20IRE
2.5V
Horizontal output
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