User's Manual

The ARCXtend CPE Transceiver converts the 5777 MHz to 477 MHz.
The cable modem locks onto the 477 MHz DS signal, handshakes with DOCSIS,
and it instructed to use an upstream of 12.8 MHz.
The CPE Transceiver converts the 477 MHz to 5287.2 & 5312.8 MHz and transmits
these over the air to the Access Point.
The Access Point is configured to receive only the 5287.2 MHz and is configured to
convert it to 12.8 MHz Upstream, which goes into the tap.
6.4 <> 41.6
U/S IF 12.8
200 <> 860
D/S IF 639
(EIA93)
ARCXtend
Subscriber
Transceiver
5729 <> 5843
D/S AIR 5777
5258.4 <> 5341.6
U/S AIR 5287.2
Modem
425<>550
D/S IF 477
6.4 <> 41.6
U/S IF 12.8
Laptop computer
LAN Data
All Frequencies are channel center in MHz
ARCXtend
Access Point
Transceiver
Upstream (Rx)
Downstream (Tx)
CMTS
Cable plant
tap
Figure 3-4: Example of a frequency plan.
3.6 Power
The Access Point has a few power options. The choice is usually made during the
site survey. The choices are:
a) Cable powered
b) Local utility power
3.6.1 Cable Powered
The most common powering is via the power on the coaxial cable itself.
The CATV industry AC power is normally square-wave 60-90 Vac, 60 Hz.
Another Access Point model can be powered from DC on the coax. It can be
powered with 8-24 Vdc. If the cable system doesn’t have the dc, a coaxial DC
inserter can be used.
ARCXtend manual, August 2003 3-10