MDR24X User’s Manual
10/26/2006
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1.
MDR24X RF Transceiver
The MDR24X transceiver is a Frequency-Hopping Spread Spectrum (FHSS) radio designed for
license-free operation in the 2.4GHz ISM band. Out-of-the box, the radio sustains a standard
asynchronous serial data stream between two or more radios. Housed in a compact and rugged
die-cast enclosure, the radio is equipped to replace thousands of meters of serial cable with its
wireless link. The radio features an RS-232 or RS-485 interface for integration into legacy data
systems.
Features
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Durable Industrial grade enclosure
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Transparent operation, supports any legacy system
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Transmits around corners, through walls
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Reliable communication up to 115.2Kbps
1.1
Overview
The MDR24X uses Frequency Hopping Spread Spectrum modulation, where the units “hop”
from frequency to frequency many times per second using a specific hop pattern applied to all
the transceivers in the same network. A distinct hopping pattern is provided for each Channel
Number, thereby allowing multiple networks to co-exist in the same area without interference.
MDR24X transceivers operate in a Point-to-Point or Point-to-Multipoint, Client-Server or Peer-to-
Peer architecture. One transceiver is configured as a Server and there can be one or many
Clients. To establish synchronization between transceivers, the Server emits a beacon. Upon
detecting a beacon, a Client transceiver informs its Host and a RF link is established.
MDR24Xs implement a proprietary communication protocol to provide secure data
transmissions. Using FHSS technology, the data remains reliable over long distances. The use
of license free frequency bands ensures that the units are ready to use with no further
certification requirements.
Each unit is small and easily portable for use in mobile and temporary settings as well as for fixed
installations. The MDR24X configuration software enables custom configurations based on
unique application requirements.
