10
MDS TransNET I&O Guide
MDS 05-2708A01, Rev. D
At Remote sites and point-to-point systems, a directional Yagi antenna
(
Figure 8
), is generally recommended to minimize interference to and from
other users. Antennas are available from a sources including MDS.
Invisible
place
holder
Figure 8. Typical Yagi Antenna
mounted to a mast
Feedlines
The choice of feedline used with the antenna should be carefully considered.
Poor-quality coaxial cables should be avoided, as they will degrade system
performance for both transmission and reception. The cable should be kept as
short as possible to minimize signal loss.
For cable runs of less than 20 feet (6 meters), or for short range transmission,
an inexpensive type such as Type RG-8A/U may be acceptable. Otherwise,
we recommend using a low-loss cable type suited for 900 MHz, such as
Times Microwave LMR 400
®
or Andrew Heliax
®
.
Figure 7.
Omnidirectional Antenna
(mounted to mast)
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