Spread Spectrum Radios-How Are They Different; Typical Applications; Wireless Ip/Ethernet Lan Connectivity; Point-To-Point System - Microwave Data Systems iNet 900 Quick Start Manual

MDS 05-2873A01, Rev. A
DRAFT 6—8/29/01
2.2 Spread Spectrum Radios—
How Are They Different?
The main difference between a traditional (licensed) radio system and
the i Net transceivers is that these units "hop" from channel to channel
many times per second using a specific hop pattern applied to all radios
in the network. A distinct hopping pattern is provided for each of the
network name, thereby minimizing the chance of interference with other
spread spectrum systems. In the USA, and certain other countries, no
license is required to install and operate this type of radio system.

2.3 Typical Applications

Wireless IP/Ethernet LAN Connectivity

This is the most common application of the MDS i Net 900 transceiver.
It consists of a central control station (Access Point) and one or more
associated Station Adapter units, as shown in Figure 2. A LAN provides
communications between a central host computer and remote terminal
units (RTUs) or other data collection devices. The operation of the radio
system is transparent to the computer equipment with the Access Point
station serving as the gateway to the WAN or host computer.
iNet S.A.
RTU
iNet S.A.
RTU
HOST
COMPUTER
Figure 2. Typical wireless LAN

Point-to-Point System

A point-to-point configuration (Figure 3) is a simple arrangement con-
sisting of just two radios—a Access Point and a Station Adapter. This
provides communications link for the transfer of data between two loca-
tions.
MDS i Net 900 Installation and Operation Guide
Invisible place holder
RTU
iNet S.A.
iNet S.A.
iNet S.A.
iNet A.P.
RTU
RTU
3