CommScope ION-U EU H 7P/80-85P/17EP/19P DC, Руководство пользователя

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2. Introduction
User’s Manual for ION
®
-U Page 15
2. Introduction
2.1. Purpose
Mobile telephone systems transmit signals in two directions between base
transceiver station (BTS) and mobile stations (MS) within the signal coverage area to
carry voice and data traffic.
If weak signal transmissions occur within the coverage area because of indoor
applications, topological conditions or distance from the transmitter, extension of the
transmission range can be achieved by means of an optical distributed antenna
system (DAS).
Office buildings, sports arenas, college campuses, industrial parks, and other areas
of high demand require the specialized capacity boost that an optical DAS can
provide to meet increasing customer demands for voice and data.
An optical DAS contains optical Master Units and a sufficient number of Remote
Units to provide the necessary coverage. The number of the Remote Units depends
on the coverage requirements of the DAS. The Remote Units are connected to the
Master Unit with optical links.
The Master Unit is the connection to the Base Transceiver Stations. The
configuration of a Master Unit depends on the number of the Remote Units and the
frequency range.
RF signals are transported to and from the Remote Units via optical fibers.
2.2. ION-U High Power Remote Units
The ION-U is an optical fiber based DAS system that efficiently takes the outputs of
multiple Base Transceiver Stations (BTS) sectors and converts those RF signals to
optical to send them over fiber optic cables to Remote Units to provide coverage in
indoor and outdoor locations. The system supports both low power and high power
remotes units and SISO and MIMO operation.
The ION-U H 7P/80-85P/17(E)P/19P is a multi-band, multi-operator Remote Unit
used in conjunction with a Master Unit in the ION optical distribution system. This
system transports up to five frequency bands simultaneously (700 MHz, 800/850
MHz, 1700/2100 MHz, and 1900 MHz), providing a cost-effective solution for
distributing capacity from one or more base stations.
It has been specifically tested and optimized for GMSK, EDGE, CDMA, UMTS,
HSPA+, LTE, and other OFDM modulations. Furthermore it is provisioned for future
modulation scheme evolutions.
These Remote Units feature independent downlink and uplink gain adjustments and
an integrated channel power detector for in-band spectrum and PIM analysis and
end-to-end auto leveling.