52
The Park / Rural Outdoor System
Similar to the urban setting is a system in a park or lightly built up outdoor area.
Range in an outdoor park system can exceed 100 meters, sometimes greatly so, but often
ambient interference is fairly weak. This is also a good application for Panel or Yagi antennas.
Remember that Yagis may require careful aiming, and that there are some additional limitations
on the installation of the powerful 14dBi Yagi. See the SHoW DMX manual for the equipment
you are using, or contact CTI for details.
Typical systems will include 7400-5708 Vero Net or 7400-5707 Vero transceivers for this
outdoor setting.
Antennas: High powered directional antennas can be of great benefit in these systems, primarily
where significant range is required. Like the urban outdoor system, these systems often include
receiver targets in the same DMX universe but located far apart, even in different directions, 180
degrees away from the transmitter. This can be a great application for an antenna splitter
feeding two identical antennas pointed in different directions. When a splitter is used, the power
from the transmitter is divided between the two antennas so each antenna's gain is effectively
reduced by half. Note that antennas on a splitter must be identical, and extension cables from
the splitter must also be identical in length and material to assure equal attenuation. Note that
Panels or Yagis can be used on both receivers and transmitters to maximize range and
rejection of interference.
Location: Locate the transmitter(s) with good height and in clear line of sight with the receiver
targets. Take advantage of the architecture whenever possible to gain altitude.
Keep multiple transmitter directional antennas pointed away from each other. Check received
signal strength during intended periods of operation. Remember that the 8 dBi Panel has a 60°
beam angle so at a moderate distance it can usually hit anywhere near the target. Be careful to
polarize antennas correctly, and test horizontal as well as vertical polarity if interference is
significant.
System settings: This may be a good application for full bandwidth configuration, depending on
how many universes you are using.
Содержание SHoW DMX Neo 5701
Страница 9: ...9 5792 SHoW DMX Neo Radio Module CE Declaration of Conformity ...
Страница 21: ...21 Antennas ...
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Страница 24: ...24 Antenna Connectors These connectors are referred to in the table above ...