參數(shù)資料
型號: 8817
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: NTSC/PAL Digital Video Encoder
中文描述: NTSC / PAL數(shù)字視頻編碼器
文件頁數(shù): 33/43頁
文件大小: 818K
代理商: 8817
ASAHI KASEI
[AK8817]
MS0413-E-00
33
2005 / Aug
(4) Vertical Sync Signal timing and Burst Phase
PAL-B,D,G,H,I
313
314
315
316
317
318
320
319
321
322
311
312
310
309
308
A
B
313
314
315
316
317
318
320
319
321
322
311
312
310
309
308
A
B
A
B
623
624
625
1
2
3
4
5
6
8
7
622
621
620
A
B
623
624
625
1
2
3
4
5
6
8
7
622
621
620
A : Phase of Burst : nominal Value + 135
°
B : Phase of Burst : nominal Value - 135
°
Since Burst frequency and Line frequency are not practically in integer-multiple relation, specified phase value is not
exactly 135 degrees.
Diagram below shows phase direction.
Equalizing Pulse and Serration Pulse
Equalizing Pulse
Serration Pulse
G
H
300mV
I
I
I
I
+/-30mV
Symbol
Measurement
point
50%
50%
50%
Value
Recommended
tolerance
+/- 0.1
+/- 0.2
+/- 0.1
Max 300
units
G
H
G
I
Pre-equalizing pulse width
Vertical serration pulse width
Post-equalizing pulse width
Sync rise time
2.35
4.7
2.35
200
usec
usec
usec
nsec
* there is a case where tolerance of Sync rise time is added to Pulse width tolerance.
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