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Different types of towers for broadboad application

Point-to-point

1. Find a suitable, elevated site for your tower;
2. Obtain a topographical map and find your proposed location on it; Record the height, longitude and latitude of the site;
3. Check for the highest elevation between your proposed tower location and identify the topographical height of the originating signal;
4. Draw a straight line on your topographical map, linking the source of the originating signal with your proposed tower site and calculate/measure the distance between these 2 points;
5. Assume that trees in eastern Ontario grow to a height of 80 feet;
6. Allow some extra height as a safety margin;
7. Are there any man-made structures in the signal path such as tall buildings, silos, hydro towers, etc?
8. Draw a graph to scale where the X-axis identifies height referenced to see level and the Y-axis distance;
9. You will need to identify 3 points on the graph: The source signal, the highest elevation between the source and your proposed location and your new tower site.
10. Mark the height of the source signal, the height of the highest elevation between the source and the proposed tower location on the graph and connect those 2 points with a straight line that then continues past your proposed tower location;
11. Measure that height on the graph and calculate tower height. You can also use trigonometry to calculate distances, angles and height through information obtained from a topographical map.

    Point-to-Multi-Point

12. Identify your projected coverage area keeping in mind, that microwave signals need line-of-sight; Claims made by various manufacturers that their microwave systems do not require line-of-sight should be taken with caution...
13. Use a topographical map and check for changes in elevation. Your signal sources are now the various antennas (multiple sectors or panels and/or omni) that will propagate the signals downwards to your various subscribers.
14. Most sectors and/or panel antennas have a mechanical down-tilt that can be adjusted for maximum performance. Check the radiation patterns of your antennas carefully so that they can be employed for maximum performance;
15. Line-of-sight during the winter may not be line-of-sight in the summer. Leafs absorb microwave energy the same way that a sponge absorbs water;
16. A hilly terrain introduces shadow effects that will cause spotty signal coverage. The higher the frequency, the more critical is line of sight and the higher the shadow effects;
17. Once you have identified the height of tower, its location and the various antennas required for your operation, you can contact a company like ours for a quote or you can contract us to do the site analysis with the required propagation studies.

 

Accidental cutting (garbage truck) of one of the first guy cables caused the collapse of this 220 ft guyed tower in 2004 in eastern Ontario.