The Q-Flex™ modem embodies a new concept
in SCPC satellite modem technology - a flexible
software-defined modem that does what you
want, now and in the future.
The Q-Flex™ modem’s flexible hardware
platform provides IF and L-band operation in
one unit. While its powerful processor makes it
ideal for handling IP traffic, the Q-Flex™ modem
can be fitted with virtually any type of terrestrial
interface and will operate at data rates up to
155Mbps.
Flexible pricing is achieved by enabling only
the features you need at any time. Futureproofing
is assured by convenient software upgrades
via Ethernet or a memory stick.
The Q-Flex™ modem supports the most powerful
bandwidth-saving technology available.
Paired Carrier™ overlays transmit and receive
carriers reducing satellite bandwidth by 50%
(using ViaSat’s patented PCMA technology).
FastLink™ low-latency LDPC has been designed
for latency-sensitive applications while
giving coding gain that is close to the theoretical
limits. DVB-S2, renowned for its robustness and
bandwidth efficiency, is also supported.
Advanced bandwidth-saving IP features include
acceleration and header and payload compression.
IF: 50 to 90MHz & 100 to 180MHz
(resolution 100Hz) (BNC connector)
L-band: 950 to 2050MHz (resolution
100Hz) (N-type connector)
Data Rate
DVB-S2: 50kbps to 155Mbps
FastLink LDPC: 4.8kbps to 100Mbps
TPC: 4.8kbps to 60Mbps, 1bps resolution
Operation to 2,048kbps provided as
standard; extension options
to 5Mbps, 10Mbps, 25Mbps, 60Mbps,
100Mbps and 155Mbps
Symbol Rate
DVB-S2: 100ksps to 45Msps
Non-DVB-S2: 9.6ksps to 40Msps
BPSK 5/16, 21/44,
0.493 (Paradise), 2/3, 3/4,
0.789 (Paradise),
7/8 (Paradise), Rate 7/8 de facto
(O)QPSK: 5/16, 21/44,
0.493 (Paradise), 2/3, 3/4,
0.789 (Paradise), 7/8 (Paradise),
7/8 de facto, 0.93 (Paradise)
8PSK: 3/4 de facto, 7/8 de facto,
0.93 (Paradise)
16QAM: 3/4 de facto, 7/8 de facto,
0.93 (Paradise)
Viterbi
BPSK/(O)QPSK 1/2, 3/4, 7/8
TCM option
8PSK 2/3
Sequential option
BPSK/(O)QPSK 1/2,
3/4, 7/8
Reed-Solomon outer codec available
with Viterbi and TCM
Ethernet Traffic
Throughput
Performance
The maximum modem throughput
depends on IP traffic format and
the features enabled. Bridged IP/
UDP data can be processed up to
the modem maximum data rate.
Please seek assistance from
Paradise Datacom in evaluating your
particular requirements.
Typical throughput level of 90% of
link capacity.
Supports 5,000 concurrent accelerated
TCP connections (plus at least
35,000 unaccelerated TCP connections)
up to the modem maximum
data rate.
Header
Compression
Option
Robust Header Compression to RFC
3095. Reduces Ethernet/IP/UDP/
TCP/RTP header sizes typically by
90%. 1-way packet processing limit:
60,000 pps; 2-way limit: 45,000 pps.
Includes Ethernet header compression
(compresses 14-byte Ethernet
frame to typically one byte)
Payload
Compression
Option
Uses Deflate algorithm (RFC 1951)
to compress all TCP/IP packets
(TCP and UDP), typically resulting in
compression of payloads by 50%
Traffic
Shaping
Option
Provides guaranteed throughput
levels for IP streams, using Committed
Information Rate and Burst Information
Rate settings. Stream
differentiation is by IP address, IEEE
802.1p priority class, Diffserv DSCP
class or MPLS EXP field
Encryption
Option
Encrypts all IP traffic using AES with
256-bit keys
IPv6
Provided as standard. Dual IPV4/
IPV6 TCP/IP stack allowing use of
both IPv4 and IPv6 addresses for
bridging and routing of traffic
VLAN Support
IEEE 802.1q VLAN support
(standard)
IEEE 802.1p Quality of Service
(packet prioritisation) using strict
priority or fair weighting queuing
DHCP, SNMP
DHCP (standard) for automatic
allocation of M&C IP address. SNMP
(standard) v1, v2c and v3
Supports encapsulation/
decapsulation of MPE, ULE and
Paradise PXE
DVB-S2 ACM
Option
Dynamically varies modcod with
varying link conditions, maximising
throughput at all times by converting
unused link margin into additional
throughput
ODU facilities via IF interface
FSK Control
Allows monitor & control of a compatible
L-band BUC or IF Transceiver
from the modem via the Tx IFL
cable
Paired Carrier
Paired Carrier
Transmit and receive carriers are
overlaid on top of each other in the
same space segment. Echo cancellation
techniques are used in the demodulator
to cancel the transmit carrier
and extract the wanted receive carrier
signal
Typically < 0.5dB
(0.7dB for 16QAM/16APSK with 10dB
power asymmetry)
Mobile
Operation
Uses GPS data to continually
recalculate position relative to satellite,
allowing uninterrupted operation in
mobile environments (ships, etc.)
anywhere in satellite footprint
Drop & Insert Option
Bearer Types
T1-D4, T1-ESF, E1-G.732
Timeslot
Selection
Independent selection of arbitrary
timeslots for both drop and insert.
Bearer
Generation
Terrestrial bearer may be looped
through modem, or terminated after
Drop Mux and a new bearer generated
by the insert Mux
Timeslot ID
Maintains the identity of individual
Drop/Insert timeslots for
N=1,2,3,4,5,6,8,10,12,15,16, 20, 24
and 30. (See extended option below)
Extended Drop & Insert Option
Multi-
Destinational
Working
All or only a subset of the received
data may be inserted into the
terrestrial bearer on the receive
path for multi-destinational working
Timeslot ID
Maintenance
The framed service is extended to
maintain the identity of individual
timeslots for all values
of N from 1 to 31
Signaling
CAS and RBS are fully supported
Advanced ESC
ESC/Aux Port
Provides high-rate async ESC or
Intelsat low-rate async IBS ESC
Electrical
Interface
IP, RS232, RS422 or RS485
Async ESC
Closed Net Plus ESC:
Overhead scales to any
ESC baud rate from 0.5% to
70% of the main channel rate
IBS Option: High-rate async channel
(1/32nd to 2/32nd of the IBS
overhead) providing async
baud rates from 0.2% to 5.1%
of the terrestrial rate
Advanced Aux
Intelsat low-rate async ESC carried In
bit 1 of TS32 providing a synchronous
channel at 1/480th of the data rate,
allowing up to one quarter of this
rate for over-sampled async data
EZ BERT Option
BER Channel
Bit error rate tester operates over
main traffic, ESC or Aux channels,
allowing BER monitoring while on
traffic. Not available in DVB-S2 mode
Test Patterns
Various test patterns compatible with
common BERtesters
