RDL-3000
INSTALLATION GUIDELINES
70-00159-01-06
Proprietary Redline Communications © 2012
Page
59
of 65
kune 12, 2012
6
Synchronization
Synchronization is an essential component of a multi-sector wireless deployment. Sector
controllers deployed at a common site (collocated), or otherwise operating in close
geographical proximity, can produce inter-sector RF interference if the transmit and
receive cycles are not synchronized (e.g., one unit is transmitting while another is
receiving). This type of RF interference degrades the wireless system performance and
may cause service outages.
The RDL-3000 built-in GPS receiver (factory equipped units only) provides a highly
accurate clock signal derived from the Navstar Global Positioning System (GPS)
satellites. The GPS receivers synchronize the clocks of sector controllers located at
distances too far apart to be interconnected directly using the synchronization port.
Figure 49 - Sync - Geographically Collocated RF Cells
GPS clocks may not be required when adjacent cell sites are sufficiently isolated by
distance or geographical features (e.g., mountains).
Figure 50 - Sync - Geographically Isolated RF Cell
Note: The GPS module does not set the RDL-3000 internal date/time clock.
Chapter 5
