Chapter 1 Welcome
Figure 1-1 Q-Flex™ Advanced Satellite Modem
The Q-Flex™ (Figure 1-1) satellite modem embodies a new concept in satellite modem
technology: a flexible software-defined modem that does what you want, now and in the
future. The Q-Flex™ modem provides a flexible hardware platform with support for IF
(70/140MHz) and L-band operation in one unit. Its powerful processor is ideal for handling
IP traffic. However, the Q-Flex™ modem can be fitted with virtually any type of terrestrial
interface and will operate at data rates up to 160Mbps.
Low cost of ownership is supported by a pay-as-you-go feature set, where individual
features can be enabled when required.
The Q-Flex™ modem incorporates a new software suite called XStream IP™. This has
been created in response to a perceived widespread dissatisfaction in the industry with
the usability and quality of service provided by IP-over-satellite in general. Paradise has
re-engineered every aspect of IP support from the ground up to ensure ease of use, a
high degree of integration between features and outstanding performance and efficiency.
Specifically:
• XStream IP™ is the most advanced integrated suite of IP optimisation and traffic
management features available in any satellite modem.
• XStream IP™ is specifically optimised to be highly efficient and reliable over satellite.
• XStream IP™ provides up to 500,000 packets-per-second processing capability for
lightning-fast IP throughput.
• XStream IP™ is simple to set up and use.
• XStream IP™ includes all IP features as standard making it very good value.
The design aim for the Q-Flex™ was to create the industrys most versatile and
bandwidth-efficient satellite modem. Among the satellite band-width saving features
available are:
• Paired Carrier™, allowing two carriers to be overlapped in the space segment,
saving up to 50% bandwidth.
• DVB-S2 and DVBS2X, state-of-the-art Forward Error Correction (FEC)
representing the most bandwidth-efficient FEC technology available.
• Spectral roll-off factors down to 5%, saving up to 15% bandwidth compared
with 20% roll-off.
• IP compression, saving up to 50% bandwidth.
• Adaptive Coding and Modulation (ACM), saving up to 50% bandwidth.
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