User's Manual

RNU4000BS Base Station User Manual
Runcom Technologies Ltd. 41
4.4.1 GPS Antenna Installation
The GPS active antenna may be mounted using two different methods:
• Attached to a pole or other hosting surface using a magnet
• Mounted to the RNU4000 unit using the supplied bracket.
For coverage of multi-sector sites using a number of BSs, one GPS antennas can serve a
number of interconnected and synchronized BSs.
The Pole and bracket mounting methods as well as the multi-sector GPS coverage are
described in this section.
Note: The Holdover time (duration that BS synchronization is retained – from the point in
time in which the GPS antenna is disconnected) is determined by the internal GPS. Currently
– approximately 8 hours.
4.4.2 Criteria for selecting the GPS antenna location
• The whole antenna area is exposed to the sky.
• GPS antenna should not be more than 10 meters from the RNU4000BS (excessive cable
length may cause interference).Bracket Mounted GPS Antenna
The GPS antenna can be assembled on to the RNU4000BS unit using the supplied.
4.4.3 GPS antenna mounted to the RNU4000BS body
• Assemble the bracket to the underside of the unit as illustrated in the following image.
• Connect the GPS antenna to the RNU4000BS GPS connector using a coax cable.
• Assemble the GPS antenna to the bracket as illustrated.
Figure 27 GPS Antenna to Bracket Connections