20
CIRCUIT OPERATION MANUAL
2) Loop Through
Supports Loop Through for the Interface function of other Satellite Devices. That means, in other Satellite device, the
control of LNB related voltage and Tone are possible.
If the signal of AUX/IRD Control is in High status, the LNB voltage is provided from LNBP. If it s in Low, the power
can be supported from the external device in the Default states.
Sti5518 has internal Digital Encoder of PAL/NTSC.
Digital Encoder can modify the Digital Video Stream with the ration of 4:2:2 or 4:4:4, OSD, Sub-picture and produce
Analogue Base band PAL/NTSC signal and RGB signal.
Encoder output supports Interlace mode or Non-interlace mode.
There are 6 Pins for the Analogue Video output. (CVBS, S-VHS(Y/C), RGB)
Moreover, it supports Teletext, closed-captions and CGMS.
Following picture shows the signal formats from the individual output.
1) CVBS Timing
2) Comparison of RGB signals.
RGB Signal Pulse
a
b
c1
c2
d
NTSC-M
5.38 s (even lines)
5.52 s (odd lines)
1.56 s
8.8 s
9.3 s
9 cycles of 3.58MHz
PAL-BDGHI
5.54 s
(A-type)
5.66 s
(B-type)
1.28 s
9.3 s
10.1 s
10 cycles of
4.43MHz
PAL-N
5.54 s
(A-type)
5.66 s
(B-type)
1.28 s
9.3 s
10.1 s
9 cycles of
3.58MHz
PAL-M
5.73 s
(A-type)
5.87 s
(B-type)
1.28 s
9.3 s
10.1 s
9 cycles of
3.58MHz
Horizontal blanking Interval
d
b
a
0
H
c1 (bit aline = 0)
c2 (bit aline = 1)
Active video
Full digital line encoding
(720 pixels - 1440 T)
Analog line encoding
(710 pixels - 1420 T)
R
B
G
100
0
CVBS Timing
5. A/V Interface
(1) Video
Summary of Contents for DSD-9255M
Page 17: ...16 CIRCUIT OPERATION MANUAL EMI Interface Timing...
Page 40: ...39 SCHEMATIC DIAGRAM...
Page 41: ...40 SCHEMATIC DIAGRAM...
Page 42: ...41 SCHEMATIC DIAGRAM...
Page 43: ...42 SCHEMATIC DIAGRAM...
Page 44: ...43 SCHEMATIC DIAGRAM...
Page 45: ...44 SCHEMATIC DIAGRAM...
Page 46: ...45 PARTS PLACEMENT ARRANGEMENT...
Page 47: ...46 PARTS PLACEMENT ARRANGEMENT...
Page 48: ...47 PARTS PLACEMENT ARRANGEMENT DSD 9255 FRONT DSD 9256 FRONT...
Page 49: ...48 PARTS PLACEMENT ARRANGEMENT...
Page 50: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp...
