Digital Video Broadcasting (DVB); User guidelines for Digital ...
Digital Video Broadcasting (DVB); User guidelines for Digital ...
Digital Video Broadcasting (DVB); User guidelines for Digital ...
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Clear sky margin (dB)<br />
Clear sky margin (dB)<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
QPSK<br />
1/2<br />
Figure 3.1- Clear sky margins <strong>for</strong> DSNG links (beam edge-to-beam<br />
edge), using transportable terminals of 1.2 m (useful EIRP 63 dBW)<br />
<strong>for</strong> different receiving earth stations (8.1 m, 4.5 m, and 2.4 m)<br />
QPSK<br />
2/3<br />
QPSK<br />
3/4<br />
QPSK<br />
5/6<br />
QPSK<br />
7/8<br />
Modulation Scheme<br />
8PSK<br />
2/3<br />
17<br />
8PSK<br />
5/6<br />
8PSK<br />
8/9<br />
99.9%<br />
99.75% 99.9%<br />
K H<br />
Availability<br />
Figure 4.1- Clear sky margins <strong>for</strong> DSNG links (beam edge-to-beam edge),<br />
using transportable terminals of 0,9 m (useful EIRP 60 dBW) <strong>for</strong> different<br />
receiving earth stations (8.1 m, 4.5 m, and 2.4 m)<br />
3<br />
2,5<br />
2<br />
1,5<br />
1<br />
0,5<br />
0<br />
QPSK<br />
1/2<br />
QPSK<br />
2/3<br />
QPSK<br />
3/4<br />
QPSK<br />
5/6<br />
QPSK<br />
7/8<br />
Modulation Scheme<br />
8PSK<br />
2/3<br />
8PSK<br />
5/6<br />
8PSK<br />
8/9<br />
99.75%<br />
8,1 m<br />
4,5 m<br />
2,4 m<br />
8,1 m
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