User's Guide

12/6/2019
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3. How strong is the serving signal? Although Cel-Fi QUATRA 4000 has the highest gain of any antenna in
its class, if the serving signal is extremely weak, then a high-gain antenna may be required to connect the
uplink calls and to get the optimal DL power on the serving side.
Grounding and Lightning Protection
Installers of Cel-Fi QUATRA 4000 are encouraged to follow the lightning protection guidelines documented in the
National Electrical Code (NEC) and NFPA 780, and/or local codes.
Server Antennas
The QUATRA 4000 Coverage Unit has a single RF output port in the form of an N-type female connector on the top
of the unit. A single whip or blade-style antenna can be attached directly, or a distributed antenna system can be
deployed.
Antenna Selection
There are two types of indoor antenna to choose from:
Omni-directional dome antennas broadcast and receive signals from all sides. They are designed for central
locations with 360º coverage requirement. Like outdoor antennas, their power is measured by their “gain”. They are
typically mounted to a ceiling for best results.
Nextivity has standard dome antennas and also offers ‘low-profile’ server antennas that are thin and occupy less
visual space.
Panel antennas are directional antennas. Panel antennas allow optimum reception to targeted areas. Like with
outdoor antennas, a directional antenna is stronger than an omnidirectional antenna which means the signals it
broadcasts are stronger. It can be mounted to either the wall or ceiling. We usually recommend placing it on the
ceiling for maximum coverage but in some spaces (like a long narrow hallway) the panel antenna can be placed on
the wall.
Nextivity has a few different panel antenna options, with different levels of gain and directivity.
MIMO vs SISO
MIMO (multiple in, multiple out) antennas have multiple feeds and typically more than one coaxial (pigtail) cable or
connector. Therefore, a MIMO antenna should only be used with a system that supports MIMO. (Cel-Fi QUATRA
1000 supports MIMO.)
A SISO (single in, single out) antenna has a single coaxial (pigtail) cable feed and/or connector, and works best with
SISO systems. Cel-Fi QUATRA 4000 is a SISO system.
Mounting (Coverage Unit)
Drop Ceiling
The QUATRA 4000 Coverage Unit is fitted with two ¼”-20 inserts in the center of the bottom side of the unit. This
is designed to mate perfectly with standard drop-ceiling infrastructure components. The mounting bracket also has
four (4) ¼”-20 threaded inserts which can be similarly used. A variety of mounting methods can be employed
through the integration of off-the-shelf accessories.