The Newtec EL178 Satellite Modulator is state-of-the-art, optimized for
high speed IP applications over satellite in compliance with the
DVB-S2 standard. As a real IP product, this modulator performs
IP processing functions such as packet filtering, routing and
encapsulation. In order to achieve speeds up to 160 Mbit/s, only
the fastest and most bandwidth-efficient encapsulation and
modulation parameters are supported.
For point-to-point backbone links, the EL178 can be used in
conjunction with the high speed IP satellite demodulator EL978.
In star networks, such as the configuration used in IP trunking
applications, the EL178 can be used in conjunction with the high
speed modem EL478 in each of the remote sites.
The EL178 offers an auto-switching Giga-bit Ethernet interface
and integrates seamlessly with terrestrial IP networks and
equipment. The incoming IP packets can be filtered using
VLAN or MAC addresses, transmitted transparently (bridging)
or routed to several destination addresses using Newtec’s
Extended Performance (XPE) Encapsulation.
The EL178 supports the DVB-S2 Multi-stream mode, allowing
the IP traffic to be divided in several streams, each stream being
transmitted with its own identifier. When the Variable Coding
and Modulation (VCM) mode is activated, each stream can be
transmitted with its own set of modulation parameters, further
optimizing the transmission efficiency when different streams
are intended to different receiving sites.
For maximum bandwidth efficiency, the EL178 can also be used
in Adaptive Coding and Modulation (ACM) mode, modifying
the modulation parameters dynamically in function of the link
conditions. An embedded FlexACM controller option is available
for point-to-point applications, while the optional Base-Band
Frame input option allows the EL178 to work with the external
Shaper, Encapsulator and FlexACM controller EL860 in point-to-multipoint
At the output of the modulator, the signal is available on an
L-Band interface. IF-Band as well as BUC power supply and
reference frequency are available as configuration options,
providing a compact and cost effective solution.
When activated, the unique linear and non- linear predistortion
option Equalink™ provides an additional link margin
improvement of up to 2dB, truly unleashing the full efficiency of
higher modulation schemes such as 16 and 32 APSK.
EL178 Key Features
QPSK, 8PSK, 16APSK and 32APSK
Data rates up to 160 Mbit/s
L-Band monitoring output
Programmable amplitude slope equalizer
Optional 10 MHz reference input/output
Optional Linear and non-linear predistortion (Equalink™)
Optional VCM and ACM operation (FlexACM)
Enables high speed IP links over satellite
Lower operational costs thanks to highest bandwidth
Easy integration with terrestrial IP networks and routers