User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
PAGE 3-10 SECTION 3: INSTALLATION & ADJUSTMENTS
3.3.8 Antenna Planning
Using the path planning tools, proper antenna size can be determined which will yield the desired
path performance. In general, the larger the antenna that is used with the LYNX.sc radio, the
better the link will perform. Larger antennas have narrower beamwidth and higher gain, which will
yield better link performance (higher fade margin, better availability) and improve immunity to
interference (due to the smaller beamwidths). However, larger antennas are more costly to
purchase and install than smaller antennas, in some cases requiring special equipment for
installation. All of these factors should be taken into consideration when selecting antennas.
In areas where transmitted output power restrictions apply, the
use of larger antennas will maintain the benefit of narrow
beamwidths and receive gain. However, output power may need
to be reduced to meet regulations. (See Section 3.13.1)
Prior to installation, the specific antenna location and mounting should be determined. This
advanced planning also yields the transmission line requirements.
Only directional antennas should be used with LYNX.sc
spread spectrum radios. These can be grid or solid parabolic
antennas (minimum 2 foot - .6 meter). Flat panel antennas are
also acceptable if the beam width is kept to a minimum.