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CONTENTS
General Overview 3
Components 3
Cable Connection 4
Connecting to the Computer 5
Connecting to the Weather Station 6
Warranty 7
This manual will familiarize you with the features and
operation of your new Short-Range Modem Pair. Please
read this manual thoroughly before using your
instrument. For customer support, or to place an order,
call Spectrum Technologies, Inc. at (800)248-8873 or
(815) 436-4440 between 7:30 am and 5:30 p.m. CST,
FAX at (815)436-4460, or E-Mail at
2
info@specmeters.com.
Spectrum Technologies, Inc
12360 S. Industrial Dr. East
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General Overview
The short-range modem pair will allow you to extend the range of your WatchDog Weather Station
up to 4000 ft. Because the station is hardwired to
your computer, it is not necessary to have a line of
sight with the station.
Components
The components of the short-range modem pair
are as follows:
1. Optically Isolated RS-485 Converter
2. 3349CB RS-422 Connector Assembly
3. Short-range modem adaptor and modular connector cable.
4. A/C adapter
The 2 converters must be connected by a length
of 6-wire cable (2 twisted pair, 1 ground, 1 voltage). The recommended wire type is number 24
AWG twisted-pair telephone cable with a shunt
capacitance of 16 picofarads/foot and a length no
greater than 4000 feet.
3