What Is Hub Site Synchronization - Radwin 5000 HPMP User Manual

Hub Site Synchronization
Scope of this Chapter
This chapter is specific to collocating HBSs. Should you require to collocate with other radio
models, you should consult with RADWIN Customer Service.

What is Hub Site Synchronization?

When several units are collocated at a common hub site, interference may occur from one
unit to another. RADWIN ODU units support the collocation of more than two units at a cen-
tral site. Like any other RF deployment, the wireless operation is highly dependent on factors
such as available frequencies, the physical spacing between radios, other interfering radios,
and whether WinLink 1000, RADWIN 2000 or RADWIN 5000 HPMP units are installed.
HSS does not eliminate the need for careful RF planning to ensure the
design will work as planned. See
site survey.
Note
The RADWIN Hub Site Synchronization (HSS) method uses a cable connected from the mas-
ter ODU to all collocated ODUs; this cable carries pulses sent to each ODU, which synchronize
their transmission with each other. The pulse synchronization ensures that transmission
occurs at the same time for all collocated units. This also results in all of the hub site units
receiving data at the same time, eliminating the possibility of interference that could result if
some units transmit while other units at the same location receive.
Figure 9-1 illustrates interference caused by non-synchronized collocated units.
RADWIN 5000 HPMP User Manual
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Chapter 9
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9-1