User's Manual

ARCXTEND USER MANUAL – R1.4, ISSUE 4
Copyright 2005 Arcwave, Inc. 3
RJ-45
F Type-2
F Type-1
CPE
Mounting
Kit
Cable Plant
60-90VAC and
DOCSIS Signal
AC Power Pack
DC Inserter LP Attenuator
Hub Mounting
Kit
Hub
PC
POE
-20 dB Monitor
Port
CPE
Cable Modem
Provided by
Arcwave
RJ-45
F Type-2
F Type-1
CPE
Mounting
Kit
Cable Plant
60-90VAC and
DOCSIS Signal
AC Power Pack
DC Inserter LP Attenuator
Hub Mounting
Kit
Hub
PC
POE
-20 dB Monitor
Port
CPE
Cable Modem
Provided by
Arcwave
Figure 2-2: ARCXtend Solution Elements
Cable and Wireless Network Interfaces
Frequency Mapping
The Hub receives a digitally modulated RF signal in the range between 90 and 860 MHZ to and
upconverts it to a selected wireless carrier frequency in the 5,725 to 5,850 MHz license-free band.
The channel can be 64 QAM or 256 QAM and up to 6 MHz wide.
The CPE receives the wireless signal and downconverts it to an RF channel in the range 425 to 550
MHz (the specific value is wireless carrier frequency minus 5300 MHz) which is provided to a Cable
Modem.
The CPE receives a digitally modulated RF signal in the range between 5 to 42 MHz and
upconverts it to a pair of fixed frequencies (one high computed as 5,300 MHz plus the RF signal
frequency, one low computed as 5,300 minus the RF signal frequency) in the range 5,250 to 5,350
MHz.
The Hub receives the wireless signal and downconverts it to the appropriate RF channel in the
range 5 to 42 MHz.
Signal Levels
The Hub includes Automatic Gain Control (AGC) on the RF input and can accept an RF input signal
of -5 to +25 dBmV while providing optimum wireless transmit power. The hub wireless transmitter
power, determined by the Downstream Path Optimization setting, can be set for on of three
modes: High (+19 dBm), Medium (+13 dBm), or Low (+3 dBm).
Note: The “High” power setting is for use with the AX1255-SM-90 and AX1255-VM-90 Network
Hubs. Use of the “High” power setting with the AX1255-SM-25 cancels the FCC certification and
voids the user’s authority to operate the unit in the 5.8 GHz band.