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Press Release |
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February 1, 2010 |
Narrow band multi-channel transceiver LMD-400-R conforms to EN300113 and FCC Part 90 |
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Circuit Design, Inc. the leading supplier of narrowband radio modules
has developed and released the data transceiver LMD-400-R, designed for
use under the European Land Mobile Service specification EN 300-113 and
Private Land Mobile Services FCC Part 90 in the U.S. market. The
LMD-400-R is the same size and pin-compatible with Circuit Design’s EN
300220 compliant license-exempt transceiver model STD-302N-R that has
been widely used in Europe as a standard transceiver for remote control
in industrial radio applications.
LMD-400-R is a synthesized
transceiver with 10 mW RF power, 4800 bps data rate and GFSK modulation.
It is designed for use in the license bands in Europe and the U.S.A.
that require the high receiver performance and narrow band transmission
shown below.
The European Land Mobile Service Specification for
data radio defined in EN 300113 requires high resistance against
interference typically represented by the parameters shown below.
LMD-400-R fulfills those specifications.
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- Adjacent channel selectivity: Limit = ≥ 60 dB @ 12,5 kHz (Receiver)
- Intermodulation response rejection: Limit for mobile & portable
equipment = ≥ 65 dB (Receiver)
- Blocking: Limit = ≥ 84 dB (Receiver)
- Spurious response rejection: Limit= ≥70dB (Receiver)
- Adjacent
channel power: Limit = -60 dB or <-36 dBm (Transmitter)
Unlike
typical low-cost wide band radios under Part 15, Part 90 licensed band
radio must be narrow band radio with 6.5 kHz, 12.5 kHz or 25 kHz channel
spacing. Frequency stability must be 2.5 ppm for the 12.5 kHz channel
spacing system. This is a stringent requirement for a small-sized OEM
SRD transceiver module. The LMD-400-R fulfills these requirements for
frequency stability in a 12.5 kHz channel spacing system.
High-power, highly functional, large and expensive Voice/Data PLMR
products (end products) with wide tuning bandwidth are very common in
the European and North American Land Mobile Service radio market. In
contrast, the LMD-400-R is a simple, very compact, low-power and
comparatively low-priced OEM transceiver module for integration in user
systems.
European users of Circuit Design’s EN300220 compliant
transceiver STD-302N-R have eagerly awaited the release of the
LMD-400-R. They plan to expand their business into the U.S. market and
European licensed band market with LMD-400-R.
Now, three
frequency versions are available, in 438-442 MHz, 458-462 MHz (EN 300113
compliant model) and 458-462.5 MHz versions (FCC Part 90 certified
model). A custom variant in the 400 MHz band, with 4 MHz switching range
is available for volume orders.
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Features |
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- Applicable standard: EN 300113 (compliant) and
FCC Part 90 (certified)
- Operating frequency (EN 300113
version): 438 - 442 MHz and 458-462 MHz
- Operating frequency
(FCC version): 458 - 462.5 MHz
- RF channel: Programmable
using PLL Synthesizer with TCXO, 12.5 kHz channel space
- RF
output power: 10 mW
- Data bit rate: Up to 4800 bps
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Modulation: GFSK
- Supply range and consumption: 3 to 5.5 V,
52 mA / TX, 42 mA / RX
- Operating temperature range: -20 to
+60°C
- Size and weight: 50 x 30 x 9 mm, 25 g
- UART
compatible digital data interface (no modem chip needed)
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Excellent vibration & shock resistance / Mechanical durability
- European and U.S. versions have the same pin configuration.
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The small, highly-integrated and fully shielded module is designed
for embedding in user equipment.
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Applications |
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Good for battery powered mobile/portable
operation, or solar cell and battery powered operation where a
power supply is not available. Typical applications include
industrial radio remote control and industrial telemetry.
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For higher power applications |
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The LMD-400-R is intended for use in
battery-powered portable applications. To reduce current
consumption and limit mechanical size as far as possible, the RF
output power of LMD-400-R is set at 10 mW. To increase the
operating range, it is possible to add an external power amplifier
to the LMD-400. The clean 10 mW transmitter signal of the
LMD-400-R can easily be amplified by 20 to 30 dB without exceeding
the adjacent channel power limits. Circuit Design. Inc. is working
with the following engineering service partner on the design and
supply of an external PA and control board for the LMD-400-R to
meet the requirements of customers for a higher power modem. Their
service is provided direct to the customer.
Reimesch
Kommunikationssysteme GmbH
Technologiepark Bergisch Gladbach
Friedrich-Ebert-Straße
D-51429 Bergisch Gladbach
Telefon:
+49 (0) 2204 / 58 47 51
e-mail: contact@reimesch.com
http://www.reimesch.de
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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 standards.
Quality is assured with an
ISO 9001-certified design and manufacturing process based in Japan.
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