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 - 4
Under ideal conditions, the maximum range between a CellCom 10 beltpack
and a transceiver/antenna is 250 meters (about 800 feet). Typical distances are
between approximately 50 meters (about 160 feet) and 150 meters (about 485
feet), depending on the particular environment.
As the transceiver/antenna requirements for a particular installation are being
determined, keep in mind both the number of beltpack users who will be
working in a particular area (based on the five-beltpack capacity of each
transceiver/antenna), and the layout and potential RF attenuating and reflecting
items in the location. Be conservative in your distance estimates to make sure
that you include enough transceiver/antennas to provide the necessary coverage
for the installation. Also note that additional transceiver/antennas may be added
to a base, up to a maximum of 10.
TRANSCEIVER/ANTENNA SETUP RULES AND TIPS
Keep the following general rules and tips in mind:
• Keep antennas high (typically, though lower placements away from interfering
objects can at times be beneficial) and line-of-sight.
• Keep them away from larger metallic objects and surfaces, and from lighting
truss.
• With the provided omnidirectional antennas, the coverage is circular so put
the transceiver/antennas in the center of the area in which you want coverage.
• In outdoor settings with line-of-sight, the absence of beneficial reflections of
the radio waves may lead to shorter than expected range; directional antennas
may be of benefit here.
• When overlapping the coverage zones of transceiver/antennas to create larger
continuous coverage areas, test the in-between areas with a beltpack for
potential areas of low RF signal; adjust the positioning of the antennas as
needed.
• Because of potential body shielding as the user moves, it will be useful to place
two transceiver/antennas in different locations within larger working areas to
minimize low-level signals and potential signal dropouts.
• Going between a larger area and a corridor via a door, especially a heavy or
shielded one, or where the walls are thick, place a second antenna in the
corridor near the doorway to assure continuous coverage.
TRANSCEIVER/ANTENNA SPLITTER (CEL-SP)
The CEL-SP antenna splitter is the device that connects multiple
transceiver/antennas to the CellCom 10 base station. It has an RJ-45 connector
that carries the data between a base transceiver port and the splitter, and five
RJ-45 connectors to feed that information to and from up to five antennas. The
splitter is always locally powered via the supplied external in-line universal power
supply.