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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： | 20/41页 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-27/41
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
Burst gate pulse
I phase
BGPPH
Y IN:
Horizontal/
vertical sync
signal
PAL
Measure the time from the left end of Hsync at
pin 42 Y IN to the left end of the pin 28 FBP IN
wave form for Hsync period.
SECAM V pulse length
SECAMV
Y IN:
Horizontal/v
ertical sync
signal
PAL
Measure the SECAM V pulse length T of the pin
28 FBPIN wave form.
Calculate as:
T(s)
×15.625kHz
<Vertical screen size correction>
Vertical ramp output
Amplitude
PAL@64
NTSC@64
Vspal64
Vsnt64
Y IN:
Horizontal/
vertical sync
signal
PAL
NTSC
Monitor the pin 23 vertical ramp output and
measure the voltage at line 24 and line 310.
Calculate as follows:
Vspal64 = Vline310-Vline24
Vsnt64 = Vline262-Vline22
Vertical ramp output
amplitude PAL@0
Vspal0
Y IN:
Horizontal/
vertical sync
signal
PAL
Monitor the pin 23 vertical ramp output and
measure the voltage at line 24 and line 310
Calculate as follows:
Vspal0 = Vline310-Vline24
VSIZE: 0000000
Vertical ramp output
amplitude PAL@127
Vspal127
Y IN:
Horizontal/
vertical sync
signal
PAL
Monitor the pin 23 vertical ramp output and
measure the voltage at line 24 and line 310
Calculate as follows:
Vspal27 = Vline310-Vline24
VSIZE: 1111111
Continued on next page.
42
28
Y IN
Hsync
FB PIN
T
28
Line 310
Line 24
Vertical ramp output
Line 310
Line 24
Vertical ramp output
Line 310
Line 24
Vertical ramp output
23
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