Stage 2: Physical Survey
The physical site survey reviews the environment of the proposed installation location, to
ensure that the sector sites are suitable for the wireless network. The results of the physical
site survey should be recorded.
Note
It is advisable to go on a clear day, so you can more easily see any
obstructions between the two sites.
To perform a physical survey:
1. From the compass readings taken in the preliminary survey, find the azimuth (hori-
zontal position) that each HSU ODU should face towards the HBS ODU.
2. Using binoculars, locate any obstructions such as tall trees, high buildings, hills or
mountains. Look for other RF towers between the two sites. Mark the locations of
the obstructions on the map.
3. Determine the location for the ODU (having regard for existing rooftop installations
and tower space). It should be above any obstructions, considering the Fresnel zone
(see Chapter 15).
4. If you need to install an ODU on a tower, make sure that the tower is far enough
from overhead electric power lines.
5. Determine a location for the indoor equipment; it should be as close as possible to
the ODU. At an existing site, there is probably an equipment room with cable-routing
channels.
Note
Outdoor CAT-5e; Maximum cable length: 100m for 10/100BaseT and 75m
for 1000BaseT (GbE PoEs)
6. Measure and record the path length of the cable from each ODU position to the
indoor equipment room.
7. Determine the ground and lightning connection points of the installation. The ODU
and PoE must both be grounded.
8. Using the Ohmmeter, measure and record the resistance of the required installation
to the grounding point. The resistance must be less than 1O ohm.
9. Review the results of the physical site survey. Decide if the site is suitable for the
wireless network installation.
• If the site is suitable, continue with stage 3, the RF survey
• If the site is not suitable, survey another site
Additional Outdoor Site Requirements
The ambient outdoor operating temperature should be -35 to 60 C (-31 to 140 F).
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