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QMultiFlex-400™ Installation and Operating Handbook
5.1 Overview
The QMultiFlex-400™ satellite modulator/multi-demodulator is designed for point-to-
multipoint IP networks and supports any network topology including star, mesh and hybrid
star/mesh networks. QMultiFlex-400™ units can be daisy chained to create arbitrarily large
networks supporting up to 128 remote sites. Layer 2 and layer 3 solutions are supported.
Features include:
•
DVB-S2 (EN 302 307-1) and DVB-S2X (EN 302 307-2) shared outbound, including
Adaptive Coding and Modulation (ACM).
•
A single modulator and up to 16 demodulators. Q-MultiFlex-400™ units can be
cascaded together to provide a single transmit carrier to many remote sites, each
of which provides a return carrier to the hub. Multi-transponder/satellite solutions
are supported.
•
DVB-S2 and DVB-S2X only returns.
•
Embeded Hub Canceller – Up to 200Mbps (Occupied bandwidth 100kHz to72mhz).
Allows carriers in a point-to-multipoint system to operate in the same satellite
bandwidth, providing satellite BW savings of up to 50%.
•
Redundancy modes: 1:1, 1:N and Geographical Redundacy features.
•
Dual IF/L-band operation. N-Type connectors are used for IF or L-Band operation.
•
Data rates up to 345Mbps (70Msps) outbound. Aggregate in-bound up to 338Mbps
(70Msps with 5% roll off used).
•
Spectral roll-off factors of 5%, 10%, 15%, 20%, 25% and 35%.
•
Q-NET™ Navigator control application, included as standard, allows all elements
of the network to be controlled from a single multi-operator application.
•
Supports low-cost Q-Lite™, QFlex™ & QFlex-400™ P2MP remote modems.
•
Built-in spectrum and constellation monitors.
•
DVB Carrier ID. Fully compliant with DVB-CID standard.
•
IF frequency ranges of 50 to 90MHz and 100 to 180MHz; L-band frequency range
of 950MHz to 2450MHz.
•
Automatic Uplink Power Control (AUPC) automatically adjusts modem output power
to maintain a constant Eb/No at the distant end of the satellite link. Available for the
shared outbound and for up to 16 individual inbounds.
•
Front panel display and keypad for local control.
•
Remote equipment can be controlled via the M&C IP port via an M&C VLAN.
Remote modem control is supported via the web GUI, the Simple Network
Management Protocol (SNMP), SSH, Telnet and the proprietary Paradise Universal
Protocol (PUP) command protocol. As well as supporting the development of third-
party user interfaces for modem control, the PUP protocol includes many useful
hooks for satellite listening applications. Remote control is supported using a
specific VLAN (separate from any traffic VLANs) where all the M&C packets are
sent over satellite in a VLAN that is received by all the remote modems.
•
Compact 1U chassis, 285mm deep (11¼ inches).
•
XStream IP™, providing an advanced integrated suite of IP optimisation and traffic
management features. These include Transport Control Protocol (TCP)
acceleration, header and payload compression, encryption, static and dynamic
routing, Dynamic Host Control Protocol (DHCP), IEEE 802.1p Quality of Service
Chapter 5 Introduction
5-1
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