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UDR-70 H.265 Portable Receiver
USER’S MANUAL V1.0
D.4.2. Pilots in DVB-S2
Pilots are unmodulated symbols grouped in blocks that can be added
on the physical layer framing level.
Pilots are used to:
•
Reduce the phase noise influence. Phase noise is created by the
frequency components around the main carrier frequency. This
noise contains components at many frequencies with randomly
changing phase.
•
Pilots are used to increase the reliability and the continuous
receiver synchronization.
It is advisable to use pilots in the following cases:
- In ACM mode (always on).
- When a noticeable amount of phase noise is present.
- At low data rates.
- When distortion is present on the signal for example due to non-
linearity.
- When using one of the following ModCods:
- 8PSK 3/5 and 2/3
- 16APSK 3/4
- 32APSK 3/5
D.4.3. DVB-S vs DVB-S2
Next there are shown a series of comparisons between DVB-S and
DVB-S2 standards.
Содержание UDR-70
Страница 1: ...UDR 70 Portable Receiver User Manual V1 0...
Страница 2: ...Accessories included in this manual QPT Pan Tilt Positioner SCDA HAP 60...
Страница 18: ...9 UDR 70 H 265 Portable Receiver USER S MANUAL V1 0 Chapter 3 How to Order...
Страница 96: ...87 UDR 70 H 265 Portable Receiver USER S MANUAL V1 0 Figure 73 Google Earth example...
Страница 117: ...108 UDR 70 H 265 Portable Receiver USER S MANUAL V1 0 7 2 8 UNIT Figure 88 Web Server Unit screen...
Страница 159: ...150 UDR 70 H 265 Portable Receiver USER S MANUAL V1 0 B 3 Mechanical Drawings...
Страница 161: ...152 UDR 70 H 265 Portable Receiver USER S MANUAL V1 0 Figure 108 Single link Configuration...
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Страница 180: ...171 UDR 70 H 265 Portable Receiver USER S MANUAL V1 0 Notes...