USER’S MANUAL
SERIES 48710 RF REPEATER
Do not apply power until antennas have been connected to both the base and service area ports
Choosing a location for the 48710 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 48710 and 48722 are not intended for outdoor operation without protection. A
outdoor version suffix “A” is designed for that purpose. A central location is desired to provide
sementry in the distribution network. Further, stacking room near a riser for easy access to the roof
and other floors is desired. However, access to clean 110 VAC power is the only requirement.
Install directional donor antenna and aligned with desired base site.
Yagis, corner reflectors, and panel antennas work the best. Usually, the more directive the better.
The 48710 has sufficiniet filtering to prevent undesired signals from causing interference, however, it
is best to reduce the chance for interfernece by directing the mobile signals only towards the desired
donor base site.
Check the incoming signal before connecting. The 48710 will work with a wide range of RF input
signal levels. Ideal levels on the down link are in the range of –70 dBm. These levels will provide
the maximum output power while not causing significant ovedrive. Also check for extremely strong
out of band signals. These may overdrive the filtering and cause gain reduction.
Connect the donor antenna to the 48710 via 50 ohm coaxial cable.
Size and type of cable are a matter of choice. Typically ½” Flexwell foam coax is used, plenum rated
for inside buildings and work areas. However, 7/8
”
cable may be used to reduce the longitudinal loss.
Superflex cables are easier to install but have higher longitudinal loss.
Install service area antenna(s).
Determine 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 neccesary to install several service area antennas For assistance
with antenna placement contact RFS Applications Engineering.
Observe MPE cautions
when
determining the type and location of all antennas!
Connect service antenna(s) via 50 ohm coaxial cable
Multiple service area antenna(s)/radiating cable runs may be connected the 48710. Splitters and taps
may be used to accommodate unique distribution systems. RFS has all the components needed to
complete even the largest installations. See our Web Catalog at
www.rfsworld.com
or call us.
Mount the 48710 Repeater upright, make sure there is sufficient space above and below the unit to
allow air to flow through the heat sink. Check to make sure the AC power cord can reach the power
source. Also provide adaquate bending room for the coxial cable.
Connect 50 ohm cables – donor antenna to “Base”, service antenna(s) to “Service”
Connect AC power to the 48710 and observe power and fault leds. The PM700-10 comes with each
unit. This connects to the 15 pin diagnotics din on the bottom of the unit either directly or via the 10
foot extension cable. The PM700-10 provides LED readouts of the PINs as explained in the
diagnostics/troubleshooting section. PIN outputs are TTL and DCV so a DVM can be used to
troubleshoot if needed.
Nintey percent of installations are trouble free. The typical problem with the other ten percent is the
signal is too weak or too strong on the downlink. See troubleshooting section for more information
A test of the installation should include multiple subscribers in various locations in the service area with
one subscriber always in the closest proximity to the repeater that will normally be allowed. This will
check to make sure that a close-in user does not overdrive the uplink and reduce coverage for other
users.
If there is an overdrive in either the up or down link, reduce path gain via the manual attenuator. Rotate
clockwise until the AGC overdrive indicator goes out.
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