Chapter 2: System hardware Installing a GPS receiverPage 2-53Procedure 1 Mounting the GPS receiver1 Ensure that the mounting position has an unobstructed view of the sky to 20º above the horizon. is not the highest object at the site. (The GPS antenna does not need to beparticularly high on a site, which would give it more exposure to lightning. It justneeds to have an unobstructed view of the sky.) is not further than 100 feet (30.4 meters) of cable from the CMM.2 Select a pole that has an outside diameter of 1.25 to 1.5 inches (3 to 4 cm) to whichthe GPS antenna bracket can be mounted.3 Place the U-bolts (provided) around the pole as shown in Figure 28.4 Slide the GPS antenna bracket onto the U-bolts.5 Slide the ring washers (provided) onto the U-bolts.6 Slide the lock washers (provided) onto the U-bolts.7 Use the nuts (provided) to securely fasten the bracket to the U-bolts.Please refer to the PMP Synchronization Solutions User Guide located on the Cambium website(http://www.cambiumnetworks.com/resources/pmp-synchronization-solutions ).Cabling the GPS AntennaConnect the GPS coax cable to the female N-connector on the GPS antenna. Please refer to thePMP Synchronization Solutions User Guide located on the Cambium website(http://www.cambiumnetworks.com/resources/pmp-synchronization-solutions ).Installing and connecting the GPS LPUInstall and ground the GPS drop cable LPU at the building (or cabinet) entry point, as described inInstall the bottom LPU on page 6-20.
