Installing the Low Power Base Station Broadband Wireless Access System Part Number: 104-0046-0001 i
BaseConnect, Expedience, NetProvision, and ProvisionLink are trademarks of NextNet Wireless, Inc. ©2004 NextNet Wireless, Inc. All rights reserved. The Low Power Base Station must be professionally installed to ensure that all regulatory requirements are met. These include but are not limited to: local building and safety codes, National Electrical Code, and the FCC rules and regulations. The NextNet Wireless Low Power Base Station is a fixed product that operates as a point-to-point wireless data link.
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
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CONTENTS Welcome ..............................................................................................1 LPB product overview .........................................................................1 Before you begin ..................................................................................1 Additional material required for installation .....................................................1 Before you begin ....................................................................................
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Welcome This document describes how to install and use the Expedience low power base station (LPB). The LPB provides wireless high-speed Internet access to CPEs installed at your subscribers’ sites. This document is intended for use by professional equipment installers. Service providers should not attempt to install the LPB. This guide describes how to install the low power base station (LPB).
Before you begin Before you install LPBs: • It is recommended that you assign a name to the LPB. For more information refer to the NNOS User Guide. • It is also a good idea to configure the base station with channel, VLAN, power, and other parameters, as described in the guide “NNOS User Guide.” Installation overview This section provides an overview of the tasks you will perform when installing LPBs. To install the lower power base station: 1 Attach the mounting bracket to pole.
Cabling overview Figure 1 illustrates how cables connect the cell site.
Attaching the LPB to a tower or pole You can use clamps to mount the bracket to a tower or pole. Figure 2 shows the clamps wrapped around a pole and screwed to the mounting bracket. Figure 2 Mounting bracket and LPB mounted on pole Note: You can also use the mounting bracket that ships with the OSU to attach the LPB to a wall. Two u-clamps on the back of the mounting bracket and 4 bolts hold the mounting bracket on a pole or tower. The bracket, like the LPB itself, must be installed vertically.
Installing the LPB inside the mounting bracket The LPB must be installed vertically. The LPB has a peg on the top, and a peg on the bottom. The upper and lower pegs snap into the mounting bracket’s peg holes. In addition to the pegs on the LPB, screws hold the LPB securely inside the mounting bracket. Slots in the mounting bracket allow you to tilt the LPB’s internal antenna from 0 to 7 degrees. Setting the LPB inside the mounting bracket You must install the LPB vertically.
4 Two sets of screw assemblies attach the bottom of the LPB to the mounting bracket. For the bottom of the mounting bracket, assemble the screw (coated with anti-seize compound), split lock washer, flat washer, ground wire, and double-tab washer, as shown in Figure 3. Let the ground wire dangle to the ground. 5 Tighten the screw inserted through the upper bracket and into the LPB in order to hold the LPB in place. 6 On the bottom arm of the mounting bracket, tighten the bolt on the bottom of the LPB.
Connecting the cable harness to the LPB The cable harness plugs into the lower corner of the LPB. Figure 4 shows the connector and describes the function of the pins in the connector. 2 1 3 7 6 11 15 12 16 18 Figure 4 LPB connector Table 1 describes the LPB connector’s pins. Table 1 Wiring diagram for LPB connector Pin number Purpose 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ENRX+ ENRXENTXGND GND -1 PPS ENTX+ GND GND GND +1 PPS +19.5 V +19.
Table 1 Wiring diagram for LPB connector Pin number Purpose 15 16 17 18 -422DATA +19.5 V GPS_V+ +422DATA Connecting the GPS unit to the base station This section provides you with GPS equipment mounting tips. It also explains how to connect the GPS to the LPB and how to daisy chain other base stations in the cell so that they can receive GPS information. Most Expedience system deployments use multiple base stations, at multiple cell sites.
Connecting the GPS unit to the LPB and daisychaining other LPBs in cell One GPS unit can support numerous LPBs in the same cell. 1 When you connect the cable harness into the back of the LPB, the GPS unit is able to receive its power from the base station. The GPS device uses 18 volts DC at 150 milliamperes. 2 So that the remaining LPBs in the cell can receive a GPS signal, connect an LPB adjacent to the LPB you just connected to the GPS unit.
Powering the LPB After you have run the cable from the LPB into the appropriate building, provide power to the LPB. To provide power to the LPB: 1 Plug the LPB communication cable running from the LPB into the end of the data line protector which is labelled as unprotected. Figure 6 illustrates the data line protector. Grounding terminals Figure 6 Data line protector Note: One side of the data line protector is marked “protected side” and the other side is marked “unprotected side”.
Grounding the LPB 1 Connect the ground wire from the LPB to the ground rod in the ground next to the building. 2 Attach all wires to the building by using electrical staples. Use drip loops as needed. Connecting to the backbone network Typically, an LPB connects to a level 2 switch. The switch controls the base station data traffic to and from the backbone network. Connect the switch to the backhaul network using the appropriate cabling.
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INDEX A antenna downward tilt, 6 anti-seize compound, 1 B backbone network connecting to, 11 base station daisy chaining within cell, 9 P pin diagram GPS connector, 9 LPB connector, 7 S switch requirement, 1 C cabling diagram for LPB, 3 D daisy-chaining base stations, 9 data line protector, 10 grounding, 10 G GPS connecting to LPB, 9 daisy-chained base stations, 9 exposure requirements, 8 mounting pole and socket, 8 powering, 9 GPS connector pin diagran, 9 grounding data line protector, 10 LPB, 11 gro
14 Installing and using the Expedience OSU
