Radio Frequency Systems Inc 48810 Manual Do Utilizador
Installation
Choose an optimal location.
The choice of a location for the 48810 to reside is often dictated by circumstance. These units
can withstand a wide range of environmental conditions, but a cooler environment will increase
the life of the product. The 48810 is not intended for outdoor operation without protection. A
central location is desired to provide symmetry in the distribution network. Furthermore, a
stacking room near a riser for easy access to the roof and other floors is desired. However,
access to clean 110/220 VAC power is the only requirement.
can withstand a wide range of environmental conditions, but a cooler environment will increase
the life of the product. The 48810 is not intended for outdoor operation without protection. A
central location is desired to provide symmetry in the distribution network. Furthermore, a
stacking room near a riser for easy access to the roof and other floors is desired. However,
access to clean 110/220 VAC power is the only requirement.
Install directional donor antenna and align with desired base site.
Yagis, corner reflectors and panel antennas work best. The 48810 has sufficient filtering to
prevent undesired signals from causing interference; however, it is best to reduce the chance for
interference by directing the mobile signals only towards the desired base site.
prevent undesired signals from causing interference; however, it is best to reduce the chance for
interference by directing the mobile signals only towards the desired base site.
Check the incoming signal.
The product will work with a wide range of RF input signal levels. Ideal levels on the downlink are
in the range of -75 dBm. These levels will provide a maximum output power while not causing
significant overdrive. Also, check for extremely strong out-of-band signals. These may overdrive
the filtering and cause gain reduction.
in the range of -75 dBm. These levels will provide a maximum output power while not causing
significant overdrive. Also, check for extremely strong out-of-band signals. These may overdrive
the filtering and cause gain reduction.
Connect the donor antenna to the 48810 via a 50-ohm coaxial cable.
Size and type of cable are a matter of choice. Typically, 1/2" Flexwell foam coax is used, plenum
rated for inside buildings and work areas. However, 7/8" cable may be used to reduce
longitudinal loss. Superflex cables are easier to install but have higher longitudinal loss.
rated for inside buildings and work areas. However, 7/8" cable may be used to reduce
longitudinal loss. Superflex cables are easier to install but have higher longitudinal loss.
Install service area antenna(s).
Determining the location and type of service area antennas is part of the distribution system
design. Generally, it is desired to minimize the amount of coax that has to be installed. However,
in buildings with extensive obstructions, it may be necessary to install several service area
antennas. For assistance with antenna placement, contact RFS Applications Engineering.
design. Generally, it is desired to minimize the amount of coax that has to be installed. However,
in buildings with extensive obstructions, it may be necessary to install several service area
antennas. For assistance with antenna placement, contact RFS Applications Engineering.
WARNING
Do not connect AC power until antennas have been connected to both the base and
service area ports.
IMPORTANT
Observe MPE cautions when determining the type and location of all antennas.
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