User's Manual

VOLUME II, CHAPTER 1, SYSTEM OVERVIEW
l With three modulation rates, such as 16 QAM, 64 QAM, 256 QAM, one rate
(any) can be set for maximum gain and additionally for maximum
throughput, to provide four step AM operation.
l With two modulation rates, such as 16 QAM (or 64 QAM) with 256 QAM,
each can be set for maximum gain and additionally for maximum throughput,
to provide four step AM operation.
This feature provides a practical trade-off between capacity and system gain to fine-
tune link performance. It provides best balance on AM operation.
The four modulation rates support near-linear 2x, 3x, 4x capacity steps.
The coding options allow capacity/gain variations on these rates to always support
up to four steps, even when just two of the possible four modulation rates are in use,
or are permitted.
Even where just one modulation rate is required/permitted, the coding option sup-
ports two-step AM operation, one for maximum throughput, one for maximum gain.
Platforms
Eclipse supports flexible customization of traffic type, traffic capacity, and traffic pro-
tection for up to three links using the INU, and to six links using the INUe.
Platform Layout
Platform
INU Supports 3 non-protected links or 1 pro-
tected/diversity and 1 non-protected link.
1RU.
INUe Supports up to 6 non-protected links for:
1 protected/diversity and 4 non-protected links,
or
2 protected/diversity and 2 non-protected links,
or
3 protected/diversity links.
2RU.
ODU 600 QPSK to 256 QAM, 5.8 GHz ISM band (USA and
Canada).
Requires RAC 60E. Fixed or adaptive modulation
rates.
26 AVIAT NETWORKS