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Tsunami MP.11a Antenna Installation Guide
If any significant part of this zone is obstructed, a portion of the radio energy will be lost, resulting in reduced
performance. Reduced performance can also occur when obstacles close to the antenna beam cause signal
reflections or noise that interfere with the radio signal.
The following figure shows some typical examples of obstacles that you must avoid for the directional
antenna to operate effectively:
▪ Neighboring buildings
▪ Trees or other obstructions
▪ Power lines
To allow optimal performance you must ensure that the type and placement of the antennas leave sufficient
clearance of the Fresnel Zone at the maximum width of the bulge, which is typically at the mid-point between
the antennas.
Figure 4. Potential Obstacles for a Directional Antenna
Chapter 1. Preparing for Installation 13
CPN 65756B Issue Date: August 2003