Cirronet HopNet 10 Series, Руководство пользователя

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Antennas
C-2 HopNet Family of Products 800281 Rev. B
Antennas
Types of Antennas
The HopNet product line can be used with a number of antennas. The physical
layout of your system determines the style of antenna you should use.
At the base station, an omni-directional antenna is normally used to ensure coverage
to all of the remote sites.
See the table below for a selection of antennas available from Digital Wireless
Corporation.
Description Gain Coupling Part #
2 dB Omni-directional 2 dB N OMNI242
9 dB Omni-directional 9 dB N OMNI249
9 dB Corner Reflector 9 dB N CORNER249
14 dB Corner Reflector 14dB N CORNER2414
Yagi Directional 15dB N YAGI2415
2 dB Mobile Antenna
(Magnetic) 2dB N BM242
5 dB Mobile Antenna
(Magnetic) 5 dB N MOB245MM
5 dB Mobile Antenna (Hole
Mount) 5 dB N MOB245HM
18 dB Parabolic Dish 18 dB N PAR2418
24 dB Parabolic Dish 24 dB N PAR2424
Guidelines
Follow these guidelines for mounting your antenna:
•
Be sure that a clear transmission path exists between units. The radio signals travel
primarily by line of sight (LOS), and obstructions between stations will degrade
the system performance.
•
Mount the antenna on a tower or other elevated structure to ensure that you have
a clear LOS transmission path between the base and remote unit. This will raise
the antenna to a level sufficient to clear surrounding terrain and other
obstructions.
•
Remember that a clear transmission path is more important for longer range
systems than for systems that cover a limited geographical area such as 2 to 4
miles. Limited coverage areas can tolerate some obstruction.