AK8817_09 Datasheet, PDF (36/50 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
(2) Vertical Sync Signal timing ( NTSC )
3H
3H
3H
0.5H
[AK8817/18]
1
2
3
4
5
6
7
8
9
21
3H
3H
3H
0.5H
263
264
265
266
267
268
269
270
271
272
273
285
G
H
I
I
I
I
40IRE
+/-3IRE
Equalizing Pulse
Serration Pulse
Equalizing Pulse and Serration Pulse
Symbol
G
H
G
I
Pre-equalizing pulse width
Vertical serration pulse width
Post-equalizing pulse width
Sync rise time
Measurement
point
50%
50%
50%
Value
2.3
4.7
2.3
140
* there is a case where tolerance of Sync rise time is added to Pulse width tolerance.
Recommended
tolerance
+/- 0.1
+/- 0.2
+/- 0.1
Max 250
units
usec
usec
usec
nsec
Rev.001E
36
2009 / 12