cialization strategy. A patent application has been filed by the university to
obtain broad, early protection of the
Transceivers for Small,
Aerocomm’s AC4490-1x1 transceiver offers
simple implementation. Photo courtesy
of Aerocomm, Inc.
Developed for the short-range
wireless market is the new
AC4490-1x1 900MHz FHSS trans-
ceiver from AeroComm, Inc. (www.
aerocomm.com). The one-inch-square module is a component for
creating local RF networks where
tight space, low power, and limited
resources are the biggest concerns.
According to the company, engineers of varying RF experience can
include wireless capability with minimal effort using the new device. All
components, including firmware, are
integrated into the multichip module
design. Modules and antennas are
simply mounted into place (via hand
solder or surface mounted with automatic pick-and-place equipment),
then powered on. No special host
software is required; 1x1s appear to
the system as cables.
The modules contain Aero-Comm's RF232 embedded protocol,
which allows for plug-and-play installation. RF232 guarantees successful
communication while making the
process invisible to the OEM. Over-the-
air issues are managed in the firmware
to synchronize, hop, gain acknowledgements, send retries, detect errors,
address messages, secure transmissions, and other features unique to RF
that newcomers may overlook.
The 1x1's standard TTL serial
interface provides bidirectional communication in point-to-point, point-to-multipoint, or multi-to-multi networks.
A number of on-the-fly control commands accommodate varying wireless
applications. Prime features include:
• Up to 115.2 Kbps serial interface
• 1 to 10mW variable output power
• Local/remote I/Os: (2) digital input
lines, (2) digital output lines, (1)
A/D input line, and (1) D/A output
• - 40°C to + 80°C industrial temperature durability
• Priced at less than $20.00 each in