Microhard Systems MRX-900, Operating Manual

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MRX-900 Operating Manual: Introduction.
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1. Introduction
1.0 Product Overview
Congratulations on choosing the MRX-900 wireless modem! Your new
MRX-900 is a state-of-the-art, 900 MHz frequency-hopping spread-spectrum
communications transceiver. Equipped with the MRX-900, terminal devices
(DTEs) up to 30 km (or more)
1
apart will be capable of establishing high-
speed
2
communications wirelessly.
Once properly installed and configured, a pair of MRX-900s provides a
practical and reliable alternative to using traditional analog phone-line
modems or “null-modem” serial cable (RS-232) connections for data
communications between terminal equipment. Moreover, wireless data
communications using the MRX-900 means you will benefit from:
n
greater flexibility and freedom to relocate terminal equipment,
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reduced cabling hassles,
n
eliminated requirement for access to wire-based transfer media
such as telephone lines,
n
the ability to communicate through walls, floors, and many
other obstacles.
While the MRX-900 is handsomely sleek and compact in its design, it
delivers power and convenience and offers quality and dependability.
The MRX-900’s versatility makes it the ideal solution for applications
ranging from office-productivity to industrial data control and acquisition.
While a pair of MRX-900 modems can link two terminal devices (“point-to-
point” operation), multiple MRX-900 units can be used together to create a
network of various topologies (“point-to-multipoint” operation). Multiple
independent networks can operate concurrently, so it is possible for unrelated
communications operations to take place in the same or a nearby area without
sacrificing privacy, functionality, or reliability.
1.1 Features
Key features of the MRX-900 include:
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transmission within a public, license-exempt band of the radio
spectrum
3
– this means there are no conditions on usage of the
MRX-900, and that it can be used without restrictions or access
fees (such as those incurred by cellular airtime);
n
a fully compliant RS-232 serial I/O data port with handshaking
and hardware flow control, allowing the MRX-900 to interface
with virtually any terminal device with an asynchronous RS-232
port, such as a computer;
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Ideal conditions with clear line-of-sight communications, using high-gain antennas.
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Up to 115,200 bits per second (bps).
3
902-928 MHz, which is license-free within North America; may need to be factory-configured
differently for some countries.