User's Manual Part 1
Stage 2: Physical Survey Chapter 2
RADWIN 2000 User Manual Release 2.5.40 2-3
Stage 2: Physical Survey
The physical site survey reviews the environment of the proposed installation location, to
ensure that the link sites are suitable for the wireless network. The results of the physical site
survey should be recorded.
To perform a physical survey:
1. From the compass readings taken in the preliminary survey, find the azimuth (hori-
zontal position) that the ODU should face towards the second 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 21).
4. If you need to install the ODU on a tower, make sure that the tower is far away 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.
6. Measure and record the path length of the cable from the ODU position to the indoor
equipment room.
7. Determine the ground and lightning connection points of the installation. The ODU
and IDU 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 60C (-31 to 140F).
Additional Indoor Site Requirements
The following requirements guarantee proper operation of the system:
Note
It is advisable to go on a clear day, so you can more easily see any
obstructions between the two sites.
Note
The IDU - ODU cable length limit is 100m, in accordance with IEEE 10/
100BaseT standards.