User's Manual

5 Hub Installation Detail – 6x60
This Section will describe a six-sector Hub using 60-degree AR1255 Hub Transceivers. These
Transceivers contain the transmitter, receiver and both Tx & Rx antennas in a single integrated
outdoor unit.
This Section also describes a system using the V3000 W-CMTS, which is a chassis-based
CMTS. This chassis has six card slots for upstream & downstream cards. The Downstream
card is a single port. The upstream card provides 6 upstream ports. Thus the system scales
from a single Downstream and single Upstream (2 cards) to a larger system. For example, the
six-sector system described earlier can have 3 Downstream cards and one Hex-Upstream card.
The maximum traffic capability possible with the V3000W is 100 Mbps in each direction.
This system is ideal for large metropolitan area networks with multiple Hub sites.
NOTE: The ARCell Hub must be professionally installed. The installer must be familiar with
local electrical, building, and other codes, as well as national codes and microwave regulations.
This is for regulatory as well as safety reasons.
5.1 Installation Detail – AR1255 60-degree Hub Transceiver
The Hub Transceiver is almost 4 feet long but weighs less than 12 lbs. It is normally mounted
on a vertical pipe.
Note: The Base Station Installation Checklist is included in the manual as a summary.
5.1.1 Cable connections
It will be more convenient to connect the transceiver cables and close the transceiver rear
weather cap prior to attaching the transceiver to its mounting pipe. Refer to the Connection
Diagram – Hub Transceiver on the following page.
Remove the sixteen screws securing the rear weather cap to the anodized aluminum back plate
of the transceiver, taking care not to damage the gasket around the weather cap. This will
reveal two aluminum modules containing the ARCell outdoor electronics
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. The upper module
contains the receiver and the lower the transmitter. Note the F-female and power
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connectors
on the bottom of each.
Attach the receive
(upstream) RG-6 to the F connector on the upper electronics module and the
transmit (downstream) RG-6 to the F connector on the lower electronics module. Arcwave
recommends the use of premium quad-shielded RG-6 coaxial cable (such as Belden 1189A) for
base station installations.
Attach the ARCell-provided power “Y” cable to the connectors on both electronics modules
(connectors are interchangeable). Note that the power connector is keyed and must be rotated
into the correct position prior to seating. The locking ring is quite stiff and must be turned
approximately ¼ turn clockwise for proper connection. Be sure that the upstream and
downstream RG-6 and the power cables clear the mounting screw holes for the rear weather
cap. Refer to the photograph in Figure 5-1. Dress the cables as shown in the photograph and
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Complete replacement of one or both of the aluminum modules containing the electronic assemblies is the only user
service possible for the ARCell Hub Transceiver.
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The pin connection information is detailed on the last page of this chapter – it is not normally needed as
ARCell supplies the power cable.
June 2003 Page 5-1