Q-Flex Satellite Modem Installation and Operating Handbook
1-2
•
TCP Acceleration
, enabling up to 93% bandwidth utilization for TCP traffic.
•
ClearLinq™ adaptive Tx pre-distorter
, providing up to 2dB compensation for
linear and non-linear distortion in the channel.
•
9-tap Rx 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. In
addition,
LinkGuard™
is patented technology (US patent 8351495) that monitors
underneath the received carrier for any interference, while on traffic.
The
Q-Flex™
modem is backwards compatible with all Quantum and Evolution series
modems.
DVB-S2X
, the successor to DVB-S2, is the most efficient and robust coding and
modulation standard available for satellite transmission.
Paradise’s
SmartLink™
technology allows non-packetized continuous traffic, such as
G.703 E1 traffic, to be used with DVB-S2. The
Q-Flex™
therefore provides a painless
migration path to newer, more efficient communications technology while fully supporting
legacy services.
FastLink™
Low-Density Parity-Check (LDPC) Forward Error Correction (FEC) combines
high coding gain with low latency.
FastLink™
can therefore be used to replace both
conventional LDPC (which has high latency) and Turbo Product Code FEC (which has a
lower coding gain).
Paired Carrier™
allows space segment reuse. It overlays transmit and receive carriers in
the same space segment reducing satellite bandwidth requirements by up to 50%. It can
be used at the same time as all our other bandwidth saving techniques. It incorporates
ViaSat’s patented PCMA technology, which is protected under U.S. patent numbers
5,596,439, 6,011,952 and 6,725,017.
This handbook will guide you through the process of installing and using your
Q-Flex™
satellite modem (including the
Q-FlexE™
and
Q-FlexV™
versions).
Redundancy Switch operation is documented separately – see ‘
Installation and Operating
Handbook for Quantum, Evolution and Q Series Satellite Redundancy Switches’
.