Spread Spectrum Radios-How Are They Different; Typical Applications; Multiple Address Systems (Mas); Rtu - Microwave Data Systems MDS TransNET 900 Installation & Operation Manual

2.3 Spread Spectrum Radios—
The main difference between a traditional (licensed) radio and the
MDS TransNET 900 transceiver is that this unit "hops" 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
65,000 available network addresses, 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, provided that RF power and antenna gain restrictions are observed.

2.4 Typical Applications

Multiple Address Systems (MAS)

This is the most common application of the MDS TransNET 900 transceiver.
It consists of a central control station (master) and two or more associated
remote units, as shown in
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. When used in this application, the
transceiver provides an excellent alternative to traditional (licensed) MAS
radio systems.

RTU

MDS TransNET
Remote
RTU
MDS TransNET
Remote
MDS 05-2708A01, Rev. B
How Are They Different?
Figure 3. An MAS network provides
Figure 3. Typical MAS network
MDS TransNET 900 I&O Guide
Invisible place holder
MDS TransNET
Remote
MDS TransNET
Master
RTU
MDS TransNET
Remote
RTU
Host System
3