LMD-400-R: 458 - 462.5 MHz0 pages

UHF Narrow Band Multi Channel Transceiver

LMD-400-R

458 - 462.5 MHz

LMD-400-R 458-462.5MHz is a synthesized multi channel transceiver module designed to meet FCC Part 90.267 for US market. This small,
highly integrated and fully shielded module is designed for embedding in user equipment. The module is suitable for various low power
industrial telecontrol and telemetry applications.

Features
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FCC Part 90.267 compliant
458 - 462.5 MHz band
Programmable RF channel with 12.5 kHz channel space
10 mW, GFSK, 4800 bps
Low power operation 3 - 5.5 V, 52 mA / TX, 42 mA / RX
Small size 50 x 30 x 9 mm
Excellent vibration & shock resistance / Mechanical durability
Wide operation range -20 to + 60 degree C

Applications
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Industrial remote control
Remote monitoring / SCADA / Security
Telemetry
Data acquisition

General

Specification

Applicable standard

FCC Part 90.267

Communication form

Half-duplex

Emission class

F1D

Modulation

GFSK

Frequency

458 to 462.5 MHz

Channel spacing

12.5 kHz / Channel programmable

Frequency stability

+/- 2.5 ppm (-20 to +60 degree C)

Aging rate

+/1 ppm / year

Data rate

4800 bps max. (Pulse width min.200 us, max. 15 ms)

Operating temp. range

-20 to +60 C

TX/RX switching time

15 ms typ. (DI vs DO)

Supply voltage

3.0 to 5.5 V

Supply current

52 mA (TX), 42 mA (RX)

Dimension

50 X 30 X 9 mm

Weight

Transmitter
part

Parameter

25 g

(All ratings at 25 degree C unless otherwise noted)

(Storage -30 to + 75 C )

Specification

RF output power

10 mW at 50 ohm (25 degree C)

Deviation

2.4 kHz (PN9, 4800 bps)

DI input level

Receiver part

Parameter

L = GND, H = 3 V to Vcc

Parameter

Specification

Receiver type

Double superheterodyne

IF

21.7 MHz (1st), 450 kHz (2nd)

Maximum input level

10 dBm

Receiver sensitivity

-116 dBm typ.(12dB SINAD )
-116 dBm typ.(BER 1%)

Co-channel rejection

- 7 dB (D/U ratio)

Spurious response rejection

70 dB

Adjacent CH selectivity

65 dB (25 kHz ch) / 55 dB (12.5 kHz ch)

Blocking

84 dB

DO output level

L = GND, H = 2.8 V

RSSI rising time

30 ms (25kHz shift), 50 ms (at power on)

Time until valid Data-out

50 ms (25kHz shift), 70 ms (at power on)

RSSI out

310 mV at -100 dBm, 240 mV at -110 dBm
Specifications are subject to change without prior notice

www.circuitdesign.jp
LMD-400-R_C ver1.1

Oct. 2012

Sales Division

7557-1 Hotaka, Azumino, Nagano 399-8303, Japan
Tel:+81-(0)263-82-1024
Fax:+81-(0)263-82-1016