User Manual

MHX-920 Operating Manual: Chapter 1 Introduction. 1

1. Introduction

1.0 Product Overview

The MHX-920 is a high-performance embedded wireless data transceiver.

Operating in the 902 - 928 MHz ISM band, this frequency-hopping spread-

spectrum module is capable of providing reliable wireless data transfer

between almost any type of equipment which uses an asynchronous serial

interface. The small-size and superior RF performance of this module make

it ideal for many applications. Typical uses for this module include:

n SCADA

n Traffic Control

n Remote Monitoring

n Fleet Management;

n Telemetry;

n Remote Camera/Robot Control;

n Security Systems; and,

n Display Signs.

While a pair of MHX-920 modules can link two terminal devices (“point-to-

point” operation), multiple modules can be used together to create a network

of various topologies, including “point-to-multipoint” and “repeater”

operation. Multiple independent networks can operate concurrently, so it is

possible for unrelated communications to take place in the same or a nearby

area without sacrificing privacy or reliability.

1.1 Features

Key features of the MHX-920 include:

n transmission within a public, license-exempt band of the radio

spectrum

– this means that it can be used without access fees

(such as those incurred by cellular airtime);

n a serial I/O data port with handshaking and hardware flow

control, allowing the MHX-920 to interface directly to any

equipment with an asynchronous serial interface.

902-928 MHz, which is license-free within North America; may need to be factory-configured

differently for some countries.