User Manual

User Reference and Installation Manual 3-14
MDS 5800 II
Larger antennas have the advantage of providing narrower beamwidths and high isotropic gain,
which yields better link performance (higher fade margin, better availability), and improves
immunity to spatial interference (due to the smaller beamwidths). However, larger antennas are
more costly to purchase and install than smaller antennas and in some cases, they require
special equipment for installation due to narrower beamwidths. They are also more easily
affected by wind.
Only directional antennas can be used with MDS 5800 II radios. Consult factory for antenna
manufacturer options.
The ISM band does not restrict antenna gain or EIRP, therefore there is no need to back off
transmit power due to excessive antenna gain.
1. Select where the cable will enter the building from the outside.
2. Determine the length of cable required. Allow three extra feet on each end to allow for strain
relief, as well as any bends and turns.
3.5.4 Documenting a Site Evaluation
Use the site evaluation form provided on the following pages to document the results of your site
evaluation. Optimally, this complete site form would be stored with the IDU for future reference.