User's Manual

Chapter 2. Overview
2–4
10004880 Rev. D1
The ODU antennas are directional, with a beam width of 17° to 20° horizontally and verti-
cally depending on frequency. The width of this beam, combined with the width of the
base station antenna beam (90° or 60°), means that only rough alignment of the antenna
is needed for establishing a wireless link, though accurate alignment is important for max-
imum signal quality.
Automatic Frequency Selection
The PacketWave 200 Series supports Automatic Frequency Selection (AFS), which helps
to ensure optimal performance in less-than-optimal conditions. A total of up to 20 fre-
quencies within the unit’s frequency band can be selected. With AFS, when interference
degrades performance on the primary frequency, the BSU will automatically shift the link
to a frequency providing satisfactory performance using QPSK.
Indoor Unit
The Indoor Unit (IU) is a power injection box for the Aperto 200 series. It is an intelligent
device that insures power will only be injected towards the Outdoor Unit (ODU) and not to
a computer or router. The IU is marked LAN and ODU ports to avoid confusion while con-
necting the IU, ODU, and computer or router. Also, IU uses standard power-over-Ethernet
cabling and therefore is limited to a maximum of 100 meters. The amount of power
required for the long-range radios is higher. Further, IU provides 36 V at 1.11 Amps yielding
40 Watts of power. Please do not attempt to use third part power injectors with the Pack-
etWave 200 series products.
If the resistance that shows the unit connected to the ODU port is not correct, no power
will be put on the CAT-5 cable. When the power is put on the cable, the IU will display a
green LED signifying power is being transmitted. The LED is not a link status light. An
orange LED shows there is an error in the connection.
Interface Box
The Interface Box is a small, free-standing unit which can be placed virtually anywhere
within the subscriber’s premises, subject to the following basic requirements:
• The unit must have access to AC power.
• The cable run to the Outdoor Unit can be up to 100 m (330 ft) with proper cable.
See Appendix E for cable details.
The Interface Box has two RJ-45 connectors for connecting to the Outdoor Unit (ODU) and
the hub, switch, or PC on subscriber’s LAN.
NOTE: These connectors are extensions of the Ethernet port on the ODU. The
Interface Box does not regenerate Ethernet signals as an Ethernet hub does. In