AK8817_09 Datasheet, PDF (35/50 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
(1) NTSC-J
SYNC Signal waveform, Burst Waveform generator
[AK8817/18]
H o rizo n ta l
re fe re n ce p o in t
S yn c ris e tim e
90%
50%
10%
50%
B u rs t H e ig h t
50%
B urst
Sync Level
S ync
H . re f. to B u rs t Sta rt
Total line period(derived)
Sync Level
Sync rise time
Horizontal Sync width
Horizontal reference point to
burst start
Burst *
Burst Height **
measurement
point
10% - 90%
50%
50%
50%
value
63.556
40
140
4.7
19
9
40
Consumer Quality
tolerance
+/- 3
Max 250
+/- 0.1
defined by SC/H
+/- 1
+/- 3
units
usec
IRE
nsec
usec
cycles
cycles
IRE
* there is a case where tolerance of Sync rise time is added to Sync width tolerance.
* Measurement of Burst time length is made between the Burst start point which is defined as the zero-cross point,
preceding the first half-cycle of the sub-carrier where Burst amplitude becomes higher than 50 % level and the Burst end
point, defined in the same manner.
19 cycles +/-10°
9 cycles +/- 1cycle
50%
NTSC Signal
Rev.001E
35
2009 / 12