Newtec Proprietary
Confidentiality: Unrestricted
R3.2_v1.0
328/387
Appendix - Overview of the Used Technologies
MDM9000 Satellite Modem
18.3 Wideband
The MDM9000 supports baudrates from 1 Mbaud up to 72 Mbaud. It also supports bidirectional
transmission up to 2 times 375 Mbps, or an unprecedented total bitrate of 750 Mbps.
18.4 Clean Channel Technology®
Newtec's Clean Channel Technology® is a combination of improved roll-off factors for DVB-S2 and
advanced filtering technologies to allow optimal carrier spacing. The combination can bring
efficiency gains up to 15%.
Clean channel technology consists out of the following three effects.
A first effect in the Clean Channel Technology is applying a smaller Roll-Off (RO) percentage than
currently used in the DVB-S2 standard. In the DVB-S2 standard the 20% and 25% roll-off factor
percentages are common. Basically this means that these percentages need to be added to the
desired bandwidth over satellite. Reducing these roll-off factors to 5%, 10% or 15% results in a
direct gain in bandwidth. This is reflected in the following formula:
Occupied bandwidth = Symbol Rate*(1+roll-off factor). The following figure compares 20% roll-off
with 5% roll-off.
To Next Page
Loading...
