ak8823 AKM Semiconductor, Inc., ak8823 Datasheet - Page 53

• Manufacturer Part Number: ak8823
• Description: Hdtv & Ntsc/pal Multi-format Encoder Sdtv/hdtv X2 Oversampling 5ch Dacs
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
16-8. SYNC Signal Waveform . Burst Waveform ( SD )
( 1-1 ) NTSC /NTSC-4.43 / PAL-M ( in case of Video Process 1 Register [ VM3 : VM2 ]-bit = 00 / 01 ) ( SMPTE-170M )
* Measurement of Burst Timing 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.
Burst Time Length ( period ) is 10 cycles in NTSC-4.43 mode.
** Burst Height of PAL-M mode is 306 mV.
MS0549-E-02
Total line period(derived)
Sync Level
Horizontal Blanking rise time
Sync rise time
Burst envelope rise time
H-Blanking start to H-reference
Horizontal Sync
Horizontal reference point to
burst start
H reference to H-blanking end
Burst *
Burst Height **
50%
H o r iz o n ta l
r e f e r e n c e p o in t
9 0 %
5 0 %
1 0 %
19 cycles +/-10°
H b la n k in g s ta r t
t o H - r e f e r e n c e
H o r iz o n ta l B la n k in g r is e t im e
NTSC 信号
9 0 %
5 0 %
1 0 %
10% - 90%
10% - 90%
10% - 90%
50%
50%
50%
50%
50%
measurement
S y n c r is e t im e
9 cycles
H . r e f . t o B u r s t S ta r t
point
S y n c
H r e f e r e n c e t o B la n k in g E n d
63.556
40
140
140
300
1.5
4.7
19
9.2
9
40
53
5 0 %
5 0 %
value
1 0 %
S y n c L e v e l
B u r s t E n v e lo p e
r is e tim e
9 0 %
B u r s t
+/- 1
+/- 20
+/- 20
+200 -100
+/- 0.1
+/- 0.1
defined by SC/H
+ 0.2 - 0.1
+/- 1
+/- 1
B u r s t H e ig h t
Recommended
tolerance
5 0 %
cycles
cycles
units
usec
nsec
nsec
nsec
usec
usec
usec
IRE
IRE
2006/10
[AK8823]