User's Manual

6
IMPORTANT: If you or your installer are not familiar with determining power levels
within the transmission system, YDI engineers will assist you in
planning your system including selecting the cable and antenna
required.
6.0 Radio Frequency Safety
It is the responsibility of the installer and the owner of the equipment to ensure that
the installation complies with government standards for Radio Frequency (RF) and
Electromagnetic Field exposure.
Please refer to OET Bulletin 65, “Evaluating Compliance with FCC Guidelines for
Human Exposure to Radio Frequency Electromagnetic Fields.” This document is
available on the Federal Communications Commission website at www.fcc.gov .
7.0 Site Selection and System Engineering
Selection of a site and proper system engineering are vital for a successful
installation of the system. The following are general guidelines to follow for proper
operation:
• The radio path must provide line of sight with no obstruction or Fresnel Zone
incursion.
• Antenna polarization must be the same on both ends of the link.
• A path analysis must be performed to ensure that the correct antenna gains have
been selected.
• The System Operating Margin must be maintained at a level above 14 dB.
Several types of system calculations may be performed on-line at the YDI
website. Please visit www.ydi.com and click on Calculations Page. For
additional technical support, please call [phone].