9
Site Selection
Site selection is important. The
DXE-RFS-TS3P
system can be positioned as close as 1/10
wavelength to transmitting antennas. The
DXE-ARAV3-4P
Active Elements are bypassed to
ground when power is turned off. A programmable sequencer, such as the
DXE-TVSU-1A,
is
required for close spacing requirements. The
DXE-TVSU-1A
is included in the
DXE-RFS-TS3P
complete Receive Four Square Array Package.
Significant pattern distortion or coupling may result from close spacing. To prevent pattern
degradation or re-radiation of electrical noise or other interference, separation of 1/2 wavelength (at
the lowest operating frequency) is ideal. See
Figure 1
. The goal is to do the best you can by
balancing all the factors.
1/10 wavelength is the
minimum
distance to any transmitting antenna
from the Four Square perimeter. 1/2 wavelength is the best distance to
prevent coupling to other antennas.
Figure 1 - Site Selection Clear Distance
Proximity to Transmitting Antennas
The
DXE-ARAV3-4P
active elements and your transmitting antenna need only minimal physical
separation to maintain safe power levels when the
DXE-TVSU-1A
sequencer is used. With 1500
watts output and a unity gain (0 dB) antenna, the closest active element can be 1/10 wavelength
from the transmitting antenna at the lowest transmitting frequency. Doubling the protection distance
quadruples safe power levels. See
Table 1
.
