Chapter 2: System hardware 108
l Cable grounding kits: Order one cable grounding kit for each grounding point on the antenna
cables. Refer to Ethernet cable testing .
l Self-amalgamating and PVC tape: Order these items to weatherproof the RF connectors
l Lightning arrestors: When the connectorized ODU is mounted indoors, lightning arrestors (not
LPUs) are required for protecting the antenna RF cables at building entry. One arrestor is required
per antenna cable. One example of a compatible lightning arrestor is the Polyphaser LSXL-ME or
LSXL (not supplied by Cambium Networks).
GPS synchronization
GPS synchronization description
Cambium offers GPS synchronization to limit the network’s own self-interference. The Cluster Management
CMM provides Global Positioning System (GPS) synchronization to the Access Point (AP) and all
associated Subscriber Modules (SM). Network operators have a choice of UGPS and CMM solutions to
select the option that works best for the environment.
Universal GPS (UGPS)
The UGPS provides network synchronization for smaller networks where a CMM may not be cost effective.
The UGPS provides synchronization for one or two modules so that even remote areas at the edge of the
network can operate with synchronization for improved performance. The UGPS works with all Cambium
PMP radios. The UGPS has a small footprint and is easy to deploy.
Figure 39 :
UGPS
Note
PMP 450/450i/450m Series - APs can power up a UGPS via the Aux/Timing port.
Note
PMP 450i/450b/450m Series - If two units are to get sync from the UGPS, then
an external power supply is required.
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