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QMultiFlex-400™ Installation and Operating Handbook
The satellite bandwidth-saving features include:
•
DVB-S2 and DVB-S2X state-of-the-art Forward Error Correction (FEC)
representing the most bandwidth-efficient FEC technology available. Now
available for both inbounds and outbounds.
•
Spectral roll-off factors down to 5%, saving up to 15% bandwidth compared with
20% roll-off.
•
Embedded Hub Canceller allowing satellite BW savings of up to 50%.
•
Adaptive Coding and Modulation (ACM), saving up to 50% bandwidth.
•
Variable Coding and Modulation (VCM), up to 6 IP streams with individual
MODCODS for optimal per-site throughput.
•
9-tap Rx adaptive equaliser, providing compensation for linear distortion in the
channel, such as from group delay. The equaliser is automatically switched on in
all modes of operation above 10Msps.
New levels of usability are provided by a leading set of built-in diagnostic tools including
spectrum and constellation monitors that facilitate the detection of any link degradation.
DVB-S2X, the successor to DVB-S2, is the most efficient and robust coding and modulation
standard available for satellite transmission and supports transmission of modulations up
to 64APSK.
Redundancy Switch operation is documented in 'Q-NET™ PDQS Redundancy Switch
Installation and Operating Handbook'.
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