CommScope ION-U EU L 17EP/17EP, Руководство пользователя

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2. Introduction
Page 16 M0200AJA_ION-U_EU_L_17EP_17EP.docx
User’s Manual for ION
®
-U
2.
Introduction
2.1. Purpose
Mobile telephone and public safety 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.
The ION-U system includes high power and low power Remote Units designed to meet
the specific requirements of a given DAS. An ION-U Master Unit can support both high
power and low power RUs simultaneously.
2.2. ION-U Low Power Remote/Extension Units
The ION-U Low Power Remote Units are scalable and integrated with up to:
•
5-band (Cell700, LMR800, Cell850, PCS1900, AWS-3 1700/2100) or
•
6-band with additional Extension Unit
•
7-band with two additional Extension Units
SISO capability. Two RUs can be operated as a pair for MIMO operation. These units
are compatible with analog, GSM, EDGE, IS-95, CDMA2000, EVDO, W-CDMA,
HSDPA, LTE and iDEN modulation standards. 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.