Navini Networks, Inc. Base Station I&C Guide
Chapter 2a
Chapter 2: Installation
Pre-installation
As was shown in Figure 4, prior to installing the equipment a number of planning and acquisition
activities take place. The installation itself takes only about 2 days. The I&C crew may or may
not be involved with all the pre-installation activities. Of these, they are most likely to be
involved in the Site Candidate Evaluation, the gathering of data for the Interference Analysis,
and the Antenna Power & Cable Selection step of the process.
Project Plan
A Project Plan is a document that lays out the work to be done, the objectives of the project, the
schedule, resources required, and so forth. If Navini is performing the I&C activities, a Project
Manager is assigned. The Project Manager prepares the Project Plan and shares it with the
Navini and customer teams.
An example of a written Statement of Work (SOW), Responsibility Assignment Matrix (RAM),
and Work Breakdown Structure (WBS) for installation and commissioning are provided in
Appendices A, B, and C. These types of documents may be used in negotiating work between
companies and contractor services.
Coverage Prediction Map
Early in the planning of deployment of Ripwave Base Station equipment, an RF Engineer will go
through the process of studying the RF environment of the candidate sites that the customer has
identified. Readings are taken and analyzed at each site in order to predict what range of
coverage can be expected from installing a Base Station at the site.
Coverage predictions account for both Base Station performance and Marketing objectives with
the service itself. The customer accomplishes the latter as part of the decisions concerning site
selection.
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Chapter 2a
Site Candidate Evaluation
Often Technicians will be very comfortable with either the networking side or the wireless side
of the system, but not usually both. To evaluate a potential install site, a form helps ensure all
aspects of the site have been considered. Information about the site is recorded on the form.
Since each site is unique, the form helps to ensure nothing is taken for granted or assumed about
the installation site for the Ripwave equipment.
A copy of this form may be found in Appendix D. It includes places to capture the logistics of
the site, tower or rooftop mount possibilities, GPS coordinates, type of antenna to be installed,
whether or not an outdoor enclosure is provided, power availability, distance between connection
points, ventilation, a place for drawings from every angle, etc. It is from this information that the
site will be designed, then installed to plan.
Interference Analysis
As part of deploying a Ripwave Base Station, the Field Service Engineer must collect critical
information from the site. The data is provided to the RF Engineering personnel, who can then
evaluate the Radio Frequency (RF) conditions. The RF Engineer analyzes the data for existing
interference from other sources, and takes that into account when creating the coverage
prediction map.
The RF Engineer, in turn, supplies to the Field Service Engineer at the site valuable data
parameters and configuration information unique to each system and each site. In addition to
coverage, though, the interference analysis also helps to predict the quality of service, the power
requirements to get above the noise floor, and other expectations regarding the site.
This study helps Navini and the customer decide which type of system (frequency) and antenna
(panel or omni) will provide the best results. To collect the data the on-site Technician or Field
Engineer performs an Interference Sweep Procedure (Appendix E) and supplies that data to the
RF Engineer(s). Refer to Appendix F for instructions on using the sweep tool.
Site Selected & Designed
After evaluating the potential sites and the coverage prediction, the customer must select the
specific site where the Base Station is to be deployed. The site must be carefully blueprinted to
prepare for equipment ordering and installation. Navini can supply specifications and drawings
to help the customer design the site. Refer to Appendices G, H, I, J, and K for BTS
Specifications, RFS Data Sheets, BTS Outdoor Enclosures Manufacturers, Rectifier/Battery
Backup Manufacturers, and a sample Base Station drawing. Check all regulatory standards (refer
to Chapter 1, Page 8 “Regulatory Information”) prior to installation.
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Chapter 2a
Network Architecture Plan
The IP Networking community involved in the project, both from Navini and the customer, often
work together to analyze and plan how the Ripwave system will be integrated into the
customer’s network. Of course, they are looking for efficient operation of the system and
seamless integration. They have to plan the traffic routing, IP addressing, protocol compatibility,
and so forth.
Antenna Power & Cable Selection
The size and type of cable used to install the Base Station affect power loss and calibration range
for the transmitter and receiver. It is at this point in the process that the specific cable
manufacturer, type of cable, and cable size must be determined. A complete procedure and tool
are explained in Appendix L. Refer, also, to Chapter 1, Page 8 “Regulatory Information” for
FCC warning regarding RF, and UL and NEC/CEC information regarding cable length and
connectors. All BTS and RF shelf Coax and Digital cables between the Digital and RF Shelves
are 60 inches in length. Physical distance between Digital and RF Shelves will always be less
than the cable length.
Bill of Materials
The customer has to generate the Bill of Materials (BoM) - the actual equipment order to be
manufactured and shipped to the installation site. Navini can provide part numbers and ordering
information, as well as recommendations and other details that will assist customers in the
correct placement of orders. There is a sample Bill of Materials in Appendix M.
Acquire Materials
Once ordered, the customer ensures that everything required for installing the Base Station is
secured and at the deployment site.
Confirm Backhaul Connection, EMS Server & FTP Server, Input
Power & Gr ounding at Site
The Backhaul connection for the Ripwave Base Station consists of up to two (2) Ethernet cable
connections with RJ-45 connectors for each BTS installed, OR, up to eight (8) T1 connections
with RJ-48 connectors for each BTS. The quantity of each connection will depend on the site
requirements. These connections need to be made available before installation begins. Refer to
the Regulatory Information in Chapter 1, Page 8 regarding backhaul connections, power and
grounding.
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Chapter 2a
The customer’s EMS Server and FTP Server should be put into place prior to the installation
crew’s arrival at site. If the customer’s EMS Server is not available until after installation begins,
the crew can typically use a laptop to perform initial configuration. The FTP Server, however,
must be in place in order to commission the Base Station and test its operation.
Power Requirements for the Base Station
Refer to Table 3 Technical Specifications and to the Regulatory Information found in Chapter 1,
Page 8. The BTS must be connected to a power supply/rectifier that is UL listed to UL60950 or
UL60950-1 and has a grounded SELV output; and it must be installed in accordance with
NEC/CEC Articles 800/810/830. A UL listed disconnect device, such as a circuit breaker or fuse,
must be installed between the power supply and the BTS chassis connections.
Ground Requirements for the Base Station
The Base Station requires an earth ground connection. This ground should exhibit a maximum of
five (5) ohms across true ground. All power and ground conductors must be mechanically
supported to avoid strain of the wires and connection points. Refer to the Regulatory Information
in Chapter 1, Page 8.
NOTE: The installation procedures, which begin next, follow the same order as shown in
the High-level I&C Process Flowchart in Figure 2.
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Chapter 2a
Install Power & Grounding
Check all regulatory standards (refer to Chapter 1, Page 8 “Regulatory Information”) prior to
installation.
System Ground Buss Bar & Surge Protectors
The Base Station system ground buss bar and data/power cable surge protectors are mounted on
the wall adjacent to the BTS rack or enclosure. They should be mounted per accepted telecom
standards and procedures.
Step 1. Mount the data/power cable surge protectors (Figure 10) with the label ‘lines’ toward
the RFS and the label ‘BTS’ toward the BTS.
Step 2. Apply a thin coat of anti-oxidant joint compound to both sides of the system ground
buss bar to ensure proper connection between it and the surge protectors.
Figure 10: Data/Power Cable Surge Protector (Not Needed in TTA BTS)
To install the eight (8) antenna and one (1) cal cable surge protectors (Figure 11), and the one (1)
or two (2) Global Positioning System (GPS) surge protectors (Figure 11) in the system ground
buss bar, follow the steps below.
1. Install the rubber gasket into the groove in the surge protector.
2. Install the surge protector in the system ground buss bar with the surge side toward the
antenna and the protected side toward the BTS.
3. Install the star washer and nut on the top of the surge protector. Torque the nut to 140-150
inch -pounds.
4. When finished, the mounted surge protectors in the buss bar will appear as in Figure 12.
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