User's Manual

ARCXTEND 5.8 GHZ USER MANUAL – R1.0, ISSUE 1
Copyright 2005 Arcwave, Inc. 19
ARCXtend Multiple Hub Configurations
Downstream
If multiple ARCXtend Hubs are to be installed such that more than one Hub is visible (line of
sight) from any ARCXtend subscriber transceiver (CPE), additional measures must be taken. A
receiver will not operate properly if it “sees” signal on the same frequency from more than one
transmitter such that the two or more signals arrive at the receiver at levels within approximately
25 dB of each other. (If the desired signal is greater than approximately 25 dB stronger than the
undesired, the receiver will function).
Since the ARCXtend downstream configuration can map the CATV plant downstream channel
to any of the specified air frequencies, the solution is to choose different downstream air
frequencies for each visible ARCXtend Hub.
Upstream
Similarly, if multiple ARCXtend Hubs are to be installed to cover a larger geographic area than
can be accommodated by the antenna pattern of one Hub, but in close enough proximity that
more than one Hub can “see” the upstream signal from a particular CPE operating at the same
upstream air frequency then there must he at least 25 dB separation for 64 QAM and 30 dB
separation for 256 QAM operation between the two CPE’s.
If this signal separation can’t be achieved then you must use different DOCSIS upstream
channels for each Hub. This means that each CM transmit frequency will be passed upstream
into the CATV plant.
IP Network Preparation
Hub’s Default IP Address
The ARCXtend Network Hub (Hub) utilizes an IP address in the cable network for remote
management and automatic of configuration of Hub parameters.
If an IP address is not provided for the Hub, it can be only accessed via the local Ethernet
interface and using the default IP address:
• IP address of 192.168.100.1
• Subnet mask 255.255.255.0
Cable Network IP Address
If remote management or plug-n-play installation is desired, the Hub must be assigned an IP
address by the cable network. This is accomplished by provisioning the MAC ID of the Hub’s
embedded cable modem (ECM) MAC ID into the networks OSS/NMS.