Chapter 2: System hardware
119
Mount ing t he GPS receiver module on t he equipment building
If mounting the GPS receiver on the equipment building (GPS receiver wall installation), select a position
on the wall that meets the following requirements:
l
It must be below the roof height of the equipment building or below the height of any roof-mounted
equipment (such as air conditioning plant).
l
It must be below the lightning air terminals.
l
It must not project more than 600mm (24 inches) from the wall of the building.
If these requirements cannot all be met, then the module must be mounted on a metal tower or mast.
Mount ing t he GPS receiver module on a met al t ow er or mast
If mounting the GPS receiver module on a metal tower or mast (GPS receiver tower or mast installation),
select a position that meets the following requirements:
l
It must not be mounted any higher than is necessary to receive an adequate signal from four GPS
satellites.
l
It must be protected by a nearby lightning air terminal that projects farther out from the tower than
the GPS receiver module.
Mount ing t he GPS r eceiver
Mount the GPS receiver (following manufacturer’s instructions) upon either an external wall (GPS receiver
wall installation) or a metal tower or mast (GPS receiver tower or mast installation).
Figure 50 :
GPS antenna mounting
Procedure 1 Mounting the GPS receiver
1
Ensure that the mounting position
l
has an unobstructed view of the sky to 20º above the horizon.
l
is not the highest object at the site. (The GPS antenna does not need to be particularly high on
a site, which would give it more exposure to lightning. It just needs to have an unobstructed
Summary of Contents for PMP 450 Series
Page 92: ...Chapter 2 System hardware 92 Figure 29 MicroPoP Omni antenna implementation pattern Vertical...
Page 134: ...Chapter 3 System planning 134 Figure 51 Mast or tower installation...
Page 135: ...Chapter 3 System planning 135 Figure 52 Wall installation...
Page 136: ...Chapter 3 System planning 136 Figure 53 Roof installation...
Page 137: ...Chapter 3 System planning 137 Figure 54 GPS receiver wall installation...
Page 158: ...Chapter 3 System planning 158 Figure 61 cnMedusa Antenna...