Stage 1: Preliminary Survey - Radwin WinLink 1000 User Manual

Stage 1: Preliminary Survey

• Ohmmeter, to check ground connection
• Binoculars
• Map
• Digital camera
• Paper, pencil, and a clipboard
• GPS device (optional)
• Compass (optional)
Stage 3: RF Survey
• Spectrum Analyzer with Max Hold function and screen capture facility that can store
multiple images, for documentation purposes
• RF accessories (connectors and cables)
• Communication devices (for example, cellular phones, or a set of walkie-talkies)
Stage 1: Preliminary Survey
A preliminary survey is necessary before visiting potential installation sites. As much detail as
possible should be obtained about the two designated ODU installation sites and the area
between them.

To perform a preliminary survey:
1. Mark the two designated installation sites on a topographic map of the area.
2. Measure the distance between the sites; check that it is within the specified range of
the equipment.
3. On the urban map, check for developed areas situated between the two installation
sites. Pay attention to these areas when performing the physical site survey; there
may be tall buildings, RF towers, or transmitters, which could cause interference to
the link.
4. Check the area between the two sites for obstructions such as:
• High ground - hills or mountains
• Lakes or large bodies of water. Water has a reflection effect on RF signals like a build-
ing. This type of reflection causes the received amplitude to be reduced. As a rule of
thumb, the presence of a large body of water between the link sites may double the
required antenna height.
5. Determine and record the compass bearings between both ODUs, relative to north.
6. If there are obstructions between the two sites, calculate the Fresnel Zone (see
Chapter 21
7. If the site chosen does not meet requirements, consider alternative sites.
8. Use the Link Budget Calculator (on the CD supplied with the equipment or using the
RADWIN Manager) to determine the expected performance.
WinLink 1000 User Manual
for details).
Release 1.9.40
Chapter 2
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