User's Manual
5
Chapter 1.Introduction
This manual explains the hardware aspects of Adcon’s RA440 remote
wireless modems, including installation issues and certain parameter
configurations. The manual is divided as follows:
• Introduction, which gives some general information and
document conventions.
• Using the RA440, which details the installation and use of the
remote wireless modem.
• Performing Advanced Functions, which discusses connectors and
controllers and provides other information for advanced users.
• Specifications, which describes operating parameters for the
devices.
AbouttheRA440remotewirelessmodem
The RA440 remote wireless modem is a low-power, medium-range
modem device that is capable of communicating with an A733 by
using Adcon's radio protocol and an A850 Gateway over a GPRS
connection to respond to data polling requests.
The unit incorporates an A431 radio module operating in the 432 to
470 MHz frequency range, making it adaptable to most radio
communication regulations in the world. The output power is 500 mW,
while the modulation is narrow-band FM (20 or 25 kHz channel
spacing). Additionally the RA440 incorporates a GSM/GPRS module
and uses the standard GSM network for retrieving commands (900/
1800 MHz in Europe, 850/1900 MHz in the US).