CIRCUIT OPERATING 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 OHigh� status, the LNB voltage is provided from LNBP. If itOs in Low, the power
can be supported from the external device in the Default states.
(1) Video
Sti5500 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
Horizontal blanking Interval
Active video
d
Full digital line encoding
0H(720 pixels - 1440 T)
baOAnalogO line encoding
(710 pixels - 1420 T)
c1 (bit aline = 0)
c2 (bit aline = 1)
NTSC-MPAL-BDGHIPAL-NPAL-M
a5.38 ?s (even lines)5.54 ?s (A-type)5.54 ?s (A-type)5.73 ?s (A-type)
5.52 ?s (odd lines)5.66 ?s (B-type)5.66 ?s (B-type)5.87 ?s (B-type)
b1.56 ?s1.28 ?s1.28 ?s1.28 ?s
c18.8 ?s9.3 ?s9.3 ?s9.3 ?s
c29.3 ?s10.1 ?s10.1 ?s10.1 ?s
d9 cycles of 3.58MHz10 cycles of9 cycles of9 cycles of
4.43MHz3.58MHz3.58MHz
Feature 7. CVBS Timing
2) Comparison of RGB signals.
GBR
100
0
Feature 8. RGB Signal Pulse
20 |
ACEC
