User's Manual

ARCXTEND 5.8 GHZ USER MANUAL – R1.0, ISSUE 1
Copyright 2005 Arcwave, Inc. 17
Tap
CATV Plant
ARCXtend
Subscriber
Transceiver
Cabl e Modem
ARCXtend
Hub
Transceiver
CATV Channel
EIA Channels 7 - 134
90 MHz - 855 MHz
ARCXtend Air Frequency
5729 MHz - 5843 MHz
CM Receive Frequency
429 MHz - 543 MHz
LAN or USB
Checking for Interference
ARCXtend supports the assignment of any downstream RF channel to one of the twenty
available downstream wireless channels. The available carriers and the corresponding CPE
downstream RF channel are given in Table 3-4. By examining the CPE downstream frequency
spectrum we can determine which of the wireless channels is free of interference.
Hub Downstream Wireless Carrier Channel CPE Downstream RF Channel
5813 MHz 99 MHz
5819 105
5825 111
5831 117
5837 123
5843 99 MHz
Table 3-4: Downstream Hub to CPE Channel Mapping
Channel Plan
Downstream Configuration
The ARCXtend downstream block diagram is illustrated in Figure 3-3. Note that the North
American DOCSIS 64 QAM or 256 QAM downstream signal is 5.25 MHz wide and is
transported within a standard 6 MHz wide channel throughout the CATV plant and the
ARCXtend system. All downstream frequencies indicated are the center frequency of the 6
MHz wide channel.
Figure 3-3: ARCXtend Downstream Block Diagram
Downstream Block Diagram
The DOCSIS cable modem downstream channel on the CATV plant is already established in
the working cable modem system. At the time of installation the ARCXtend Hub is automatically
configured to the CATV downstream channel. Any EIA channel between 7 and 134, inclusive,
may be utilized. Table A-4 in Appendix A provides a list of these channels and their
corresponding center frequencies.