User's Manual

All ac
Upstream
DC
Power
Base
Station
UPS
AC/DC
Power
Converter
Backhaul to ISP
DOCSIS
Wireless CMTS
Upconverter
Downstream
Network
Management PC
100 Mbps
Ethernet Sw
ISP-Furnished
Gateway & Router
ARCell Hub
Transceiver/ant
Figure 1-3: Single-Sector Hub Configuration.
The Hub Transceiver is aimed at the geographic area of the Subscriber Transceivers to be
served. From one to four Hub Transceivers are required at the base station, depending on the
desired subscriber coverage, as each Hub Transceiver “illuminates” a sector (arc).
The details of antenna coverage and frequency utilization are covered in the
Frequency/Coverage Planning section of this manual.
Each Hub Transceiver requires a separate upstream and downstream IF cable, so a single-
sector Hub system requires 2 IF coaxial cables, and a six-sector Hub requires 12 IF cables.
The DC power for the Transceivers can be run in parallel to the coax cables, one per
Transceiver, or a larger shared cable can be run to an Outdoor Junction Box on the roof, and
power distributed from there. Details are discussed in the Base Station Installation Details
section of this manual.
The Base Station Installation Details section provides mounting, test access and system
grounding recommendations for the Hub Transceiver.
The Link Budget Parameters section provides radio frequency details that are useful in those
special cases when RF link planning is needed.
Located in the equipment room are:
1) Wireless CMTS (W-CMTS)
2) Network Manager System
3) Upconverter (in some configurations)
4) 100 Mbps Ethernet switch
5) ISP Access: Gateway, Router, Backhaul, as required
June 2003 Page 1-4