Comunications: 900-MHz RF Modem Delivers Data Over Distances Reaching 20 Miles

Oct. 18, 2004

A transceiver that talks over line-of-sight distances of 20 miles isn't idle gossip. The ConnexLink 900-MHz transceiver, which offers a full 1 W of output power, can be set up in minutes for communication between industrial RS-232,
-422, and -485 devices. It provides reliable data transmissions at up to 115.2 kbits/s. Available for less than $290 per unit, less than half the price of similarly specified modems, the RF modems can be used in many applications. Optional drivers enable custom configurations, and any number of remote ConnexLinks can form point-to-point or point-to-multipoint configurations. A unique embedded protocol (RF-232) manages interference rejection, error detection, addressing, security, link verification, and other over-the-air concerns.

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About the Author

Dave Bursky

Technologist

Dave Bursky, the founder of New Ideas in Communications, a publication website featuring the blog column Chipnastics – the Art and Science of Chip Design. He is also president of PRN Engineering, a technical writing and market consulting company. Prior to these organizations, he spent about a dozen years as a contributing editor to Chip Design magazine. Concurrent with Chip Design, he was also the technical editorial manager at Maxim Integrated Products, and prior to Maxim, Dave spent over 35 years working as an engineer for the U.S. Army Electronics Command and an editor with Electronic Design Magazine.