Q-Flex Satellite Modem Installation and Operating Handbook
5-7
DVB-S2
• IP-over-DVB encapsulation. Supports the
transmission of IP packets with/without Ethernet
frames over DVB-S2/DVB-S2X using Multiprotocol
Encapsulation (MPE) (EN 301 192), Unidirectional
Lightweight Encapsulation (ULE) (RFC 4326) and
Paradise XStream Encapsulation (PXE).
• ACM. Enables DVB-S2/DVB-S2X Adaptive Coding
and Modulation (ACM).
• VCM. Allows either two ASI streams, or one ASI
stream and one IP stream, to be multiplexed onto a
single carrier.
S2XT Enables DVB-S2X Tx operation for all supported
modulations. Includes XStream IP™ DVB-S2.
S2XR Enables DVB-S2X Rx operation for all supported
modulations. Includes XStream IP™ DVB-S2.
DVB2T Enables DVB-S2 Tx operation for all supported
modulations. Includes SmartLink™ and XStream IP™
DVB-S2.
DVB2R Enables DVB-S2 Rx operation for all supported
modulations. Includes SmartLink™ and XStream IP™
DVB-S2.
Mode
S2XLL Enables the following proprietary extensions to DVB-
S2X:
• Very Short Frame: Frame size of 5,400 bits,
reducing latency to 33% of standard DVB-S2 Short
frame; supports QPSK/8PSK/16APSK/32APSK
2/5, 7/15, 8/15, 3/5, 2/3, 11/15, 4/5, 13/15, 14/15
• Ultra Short Frame: Frame size of 3,240 bits,
reducing latency to 20% of standard DVB-S2 Short
frame; supports QPSK/8PSK/16APSK/32APSK
1/3, 4/9, 5/9, 2/3, 7/9, 8/9
Tx Predistorter
CLNQ Corrects for linear and non-linear distortion in the RF
chain. Applicable to all FECs and modulations
including DVB-S2X, FastLink™ and TPC.
low-latency LDPC to the
prevailing data rate of the modem (subject to maximum
data rate of 100Mbps). Includes all relevant
modulations and FEC rates.
56kbps to 256kbps
PCMZ
Enables
data rates in the given range
(inclusive). Incorporates ViaSat’s patented PCMA
technology. For all supported data rates, Paired
Carrier™ is subject to a minimum occupied bandwidth
of 30kHz and a maximum of 54MHz.
256kbps to 512kbps
PCMA
Enables
data rates in the given
range.
512kbps to 1.024Mbps
PCMB
Enables
data rates in the given
range.
1.024Mbps to 2.5Mbps
PCMC
Enables
data rates in the given
range.
Table 5-2 Software Activated Features (continues over page)