Vitec Multimedia CellCom 10, Инструкция по эксплуатации

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C E L L C O M 1 0 W I R E L E S S C O M M U N I C A T I O N S Y S T E M
7 - 3
CABLING THE CEL-TA TRANSCEIVER/ANTENNAS
Each CellCom 10 transceiver/antenna receives its necessary data and digital
communications audio via a direct connection with the base station transceiver
ports. Between these two ports, up to 10 transceiver/antennas can be supported.
A transceiver/antenna may either be directly connected to a base station port
using 4-pair CAT-5 data cable with RJ-45 connectors on each end, or it may be
connected to the base through an antenna splitter.
BELTPACK SUPPORT CAPACITIES FOR TRANSCEIVER/ANTENNAS
Each transceiver/antenna can support five beltpacks within one coverage zone.
With the supplied omnidirectional antennas, the coverage pattern is circular or
donut-shaped, with a maximum range of up to 250 meters (800 feet), but with
typical range between 50 meters and 150 meters – depending on the
environment in which it is installed.
When designing the system, determine how many beltpack users will be in or
passing through a given coverage zone. If it will be five or fewer users, then place
one transceiver/antenna in the center of that area. If it is between 6 and 10 users,
place two transceiver/antennas next to each other, both with a direct connection
to the CellCom 10 base or splitter. In larger systems – approaching 20 beltpacks
– it is wiser to allow one transceiver/antenna for every 3 to 4 users to ensure
smooth handoffs between transceiver/antennas. It is good practice to have each
beltpack “seeing” two or more antennas, so a minimum of two antennas in any
system is to be considered.
If a sixth beltpack user goes into a coverage zone with only one
transceiver/antenna, and that user is out of range from another
transceiver/antenna in the overall system to which that beltpack is currently
connected, it will lose connection with the system. This is because the
tranceiver/antenna has a maximum capacity of five beltpacks at a time. If one of
the existing users in that coverage area turns off a beltpack or leaves the area, then
the sixth beltpack will find an open slot and will be reconnected with the system.
The proprietary technology within CellCom 10 permits the beltpack user to go
between coverage zones created by different transceiver/antennas connected to
the CellCom 10 base, and for the system to hand over the communication
between beltpack and base from one transceiver/antenna to the next one. Thus, a
larger, customizable communications area may be designed.
COVERAGE AREAS UNDER VARIOUS CONDITIONS
Just as with any other product communicating via radio waves, the effective
distance between the beltpack and the transceiver/antenna (the range) will differ
depending on the particular environment in which it is being used. Radio waves
can be attenuated by walls, floors, ceilings, trees, shrubbery, the human body
(such as an audience), and numerous other objects. They can be reflected and/or
stopped by metallic objects such as structural beams, safety doors, lighting
equipment and truss, bodies of water, and so on.