MDS 05-2708A01, Rev. B
MDS TransNET 900 I&O Guide
7
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Figure 7. Typical remote station arrangement
3.2 Site Selection
For a successful installation, careful thought must be given to selecting proper
sites for the master and remote stations. Suitable sites should provide the
following:
• Protection from direct weather exposure
• A source of adequate and stable primary power
• Suitable entrances for antenna, interface or other required cabling
• Antenna location that provides an unobstructed transmission path in the
direction of the associated station(s)
These requirements can be quickly determined in most cases. A possible
exception is the last item—verifying that an unobstructed transmission path
exists. Radio signals travel primarily by line-of-sight, and obstructions
between the sending and receiving stations will affect system performance. If
you are not familiar with the effects of terrain and other obstructions on radio
transmission, the discussion below will provide helpful background.
Terrain and Signal Strength
While the 900 MHz band offers many advantages over VHF and lower UHF
frequencies for data transmission, it is also more prone to signal attenuation
from obstructions such as terrain, foliage or buildings in the transmission
path.
POWER SUPPLY
13.8 VDC @ 500 mA
(6–30 Vdc)
DATA TERMINAL
EQUIPMENT
MDS
TransNET 900s
LOW
-LOSS FEEDLINE
ANTENNA
SYSTEM
Содержание EL805
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