| Press Release |
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September 20, 2010 |
Circuit Design, Inc. announces the release of an FCC Part 15 compliant industrial-use DSSS true diversity radio transceiver modem for the U.S. market |
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Circuit Design, Inc.
has announced the release of the MU-D1-R 915 MHz, an embedded
low power radio transceiver modem for industrial use that
complies with U.S. FCC Part 15.247.
Circuit Design, Inc.
will exhibit the product at the Electronica trade fair in
Munich, Germany in November and start shipment of samples at
the same time.
The MU-D1-R operates in the U.S. ISM
band frequencies (902 to 928 MHz). Designed to be embedded in
equipment, this radio modem was developed for industrial
applications that require stable and reliable operation. It
has a low consumption current, so it achieves line of sight
radio communication beyond 300 m with battery operation.
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Besides using highly
noise-resistant direct-sequence spread spectrum (DSSS)
modulation, the modem has a true diversity receiver function
with two receiver circuits for preventing signal dropout due
to multi-path fading. This ensures highly stable and reliable
radio communication in the congested 902 to 928 MHz ISM band
which is used by various types of equipment. With 20 frequency
channels, it can be used in several radio systems. The modem
operates at low power (55 mA / 5 mW when transmitting and 58
mA when receiving) and with its small size (36 x 26 x 8 mm),
it can be built into units that require battery operation.
In addition to the CDP series transmitter and receiver
modules and STD/LMD series transceiver modules which are
highly regarded in the Japanese and European markets, Circuit
Design offers the MU series radio modem with a built-in
wireless protocol to enable the input/output of data with
simple commands. With its built-in CPU, the MU series performs
wireless-specific high frequency control for UART
communication with an external microcomputer. As a result, it
shortens development time significantly and reduces the number
of product parts. In addition, the built-in protocol makes
networking simple, and besides applications that require
reliability and real time control such as industrial remote
control, it is expected to be used in a wide range of low
power industrial applications such as monitoring systems where
battery operation is required.
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The features of the
MU-D1-R are explained below.
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- Control of the UART interface using dedicated commands
- The UART serial interface is used for the user interface
- Transmitting and receiving data, and changing and
setting communication parameters and Link IDs is possible
using dedicated 2-character commands.
- A highly reliable, industrial use modem
- Direct
sequence spread spectrum for superior noise resistance: 15
chips
- Instead of simple antenna switching type
diversity, the modem uses a true diversity receiver
circuit with two built-in receiver circuits.
- Wide
operating temperature range (-20 to +65ºC) TCXO built in
- All high frequency circuits are enclosed inside the
shield case
- Low power operation
- A low power system that can
run on batteries (transmitting: 55 mA, receiving: 58 mA)
Main Specifications
| Relevant specification |
FCC Part 15.247 |
| Frequency |
905.5 to 924.5 MHz |
| Number of channels |
20 |
| Output |
Switchable between 5 and 40 mW |
| Data rate |
40 kbps (interface) 600 kbps
(wireless 40 kbps x 15 chips) |
| Operating temperature |
-20 to +65°C |
| Operating voltage |
4 to 5 V |
| Operating current |
TX: 55 mA / 5 mW, 130 mA / 40
mW RX 58 mA |
| Size and weight |
36 × 26 × 8 mm / 13 g |
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Applications
- Remote control of industrial equipment
- Low power telemetry and monitoring systems
Unit price
- Sample 14,000 yen 6,200 yen in 1,000 unit lots
About Circuit
Design
Circuit Design, Inc. designs and supplies low power
radio modules for various application fields such as
telecontrol, telemetry, alarms, serial data transmission and
audio. The products comply with European ETSI, US FCC and
Japanese ARIB standard.
Quality is assured with an
ISO9001-certified design and manufacturing process based in
Japan.
Diagram of the diversity receiver
Block diagram of the product
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