User's Guide

15
CHAPTER 4. CONFIGURATION MODES (OPTIONS)
Off-Air
Cel-Fi QUATRA can be installed off-air to provide high-quality in-building wireless connectivity by using
the existing cellular network. Off-air installations comprised of an NU and up to four (4) distributed CUs
dynamically networked into a single system to provide high-quality in-building wireless connectivity.
External Antenna is required when using more than one CU in off-air mode.
Be sure to choose the System Mode “External Antenna” or “Internal Antenna” in the Cel-Fi WAVE Portal
when using the internal Cel-Fi QUATRA in Off-Air.
Selecting the Right Donor Antenna
The QUATRA 1000 system is provider-specific and supports MIMO capability. For that reason, for best
performance, in Off-Air mode, each NU should be connected to a high-gain directional MIMO antenna.
The Cel-Fi Wideband MIMO Panel Antenna (model: A52-X12-100) is perfect for this application. Used
with the AntennaPositioning application (via WAVE) and a Cel-Fi Mount ensures that the system will
have the best donor signal possible.
The QUATRA 2000 system includes a dual-carrier, software configurable NU, so multiple donor sources
are accessed by the antenna to provide signal. For this reason, an omni-directional antenna is ideal.
Nextivity offers an omni-directional wideband antenna (model: A11-V14-100) with MIMO outputs that is
a perfect donor for the QUATRA 2000 NU.