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
1
– 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.
1
902-928 MHz, which is license-free within North America; may need to be factory-configured
differently for some countries.
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