About Hopper Plus Units - Wi-LAN Hopper Plus 120-24 Installation And Configuration Manual

Description
License-Free ISM Bands
900 MHz
North America
2.4 GHz
Worldwide
5.7 GHz
Worldwide
Direct Sequence Spread Spectrum (DSSS) technology converts a data stream into packets and spreads the
packets across a broad portion of the RF band. The particular spread pattern depends upon a code. With
multi-code DSSS (MC-DSSS), multiple codes and spread patterns are employed. A spread spectrum receiver
reconstructs the signal and interprets the data.
Some advantages of DSSS are as follows.
• Fast throughput: A wide bandwidth means fast data throughput.
• Resistant to interference: DSSS overcomes medium levels of interference and multipath problems.
• Security: There must be a decoder at the receiving end to recover data (a Hopper Plus can only talk
to another Hopper Plus). Data is transmitted at irregular time intervals. Upon request, Wi-LAN can
assign a customer a data packet security code so that a customer can only receive transmissions from
another Hopper Plus with the same code.
• Low probability of detection: Due to a low amplitude signal and wide bandwidth.
• No license fee: A license fee is not required if used in the specified radio bands, transmitter power is
limited, and a non-standard antenna connector is used.

About Hopper Plus Units

Hopper Plus units can function as base stations, remote units or repeater bases.
Base Station: At least one unit in your wireless network must be a base station. A base station acts as the
central control unit of the wireless network. The base station polls all remote units and controls how traffic is
routed to and from remotes. The base usually connects to a major access point of the wired network. The
antenna of the base station must be capable of transmitting and receiving radio signals to and from all the
remote units in a system. If remotes are spread over a large area, an omni-directional antenna is usually
required. See Configuring a Base Station
2
902 MHz
2.4 GHz
5.725 GHz
, page 16 for information about setting up a base station.
26 MHz Wide
928 MHz
83.5 MHz Wide
2.4835 GHz
125 MHz Wide
Hopper Plus 120-24 Installation & Configuration Guide
5.85 GHz