Radwin 2000+ SERIES, User Manual

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RADWIN 2000+ Series User Manual Release 4.2.40 12 ‐ 2
GSU
12.3.1 GSU
The GSU is an outdoor unit consisting of a small size enclosure, a GPS antenna and a PoE
device.
It may be operated through an HSS unit or over Ethernet.
For use over Ethernet, the GSU requires Layer 2 connectivity to the multiple Hub ‐ Sites that it
is required to synchronize. It synchronizes the transmission timing of these Hub ‐ Sites to the
same clock source thus eliminating mutual interference. Typically, an IDU ‐ H/HP is used.
Figure 12 ‐ 1: General GSU configuration using both Ethernet and an HSS unit
The GSU receives a synchronization signal from the GPS once per second. It distributes a
RADWIN proprietary synchronization signal to all other ODU units using a proprietary
synchronization signal over Ethernet.
When the GSU doesn’t receive a synchronization signal from the GPS for 30 seconds, it moves
automatically to Self ‐ Generation mode until the GPS recovers.
12.3.2 GSU Kit Contents
The GSU package includes: