SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
1.1.3 EL470 IP Satellite Modem
The EL470 is a state-of-the-art satellite modem designed for the transmission and
reception of IP streams over satellite at rates of up to 133 Mbit/s in full compliance
with the DVB standards. The EL470 modem connects directly to terrestrial IP
network infrastructures via a single auto-switching Gigabit Ethernet interface
The EL470 comes with several hardware and software options and can be used in
Point-to-Point links as well as in Point-to-Multi Point networks. It is compatible with
a wide range of encapsulation protocols: data piping, MPE, ULE and Newtec’s
XPE (Extended Performance Encapsulation).
The EL470 is capable of receiving DVB-S2 multi-stream and VCM signals and can
optionally transmit in VCM mode.
For maximum bandwidth efficiency an ease of operation, the EL470 has an
embedded point-to-point FlexACM controller option that allows to automatically and
dynamically adapt its uplink modulation parameters in function of the link condition.
The FlexACM client option provides the modulator/modem on the other side of the
satellite link with feedback on the conditions of the received signal. When two
modems both equipped with the FlexACM controller and client options are
connected to each other, they negotiate automatically and dynamically their
configuration parameters in both directions.
At the output of the modulator, the signal is available on an L-band interface.
Extended L-band, IF-band as well as BUC power supply and reference frequency
are available as configuration options, providing a compact and cost effective
solution.
The EL470 has a dual L-band input. The active input is selected by the user and
can provide DC power and frequency band selection signals compatible with most
professional and commercial LNBs. Optionally, one L-band input can be replaced
by an IF input.
The integrated Noise & Distortion Estimator (NoDE) tool provides an accurate
reading of the satellite link margin even in presence of non-linear distortion and
allows the user to find the optimum input back-off setting very easily for 16APSK or
32APSK operation, whether or not non-linear predistortion is applied.
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