Radiometrix Ltd

LMT1/LMR1 Data Sheet

page 7

Condensed specifications

Frequency

Any frequency in the 173MHz and 151MHz bands

In UK band, only 173.250, 173.275, 173.300 and 173.325 MHz are

used as standard

Other custom variants from 130 - 180MHz on any 2MHz band

Frequency stability

±1.5kHz

Channel spacing

25kHz (12.5kHz by special order)

Number of channels

16 channels controlled by parallel port

or 32 via serial RS232 interface

Operating temperature

-20 ºC to +70 ºC (Storage -30 ºC to +70 ºC)

Spurious radiations

Compliant with ETSI EN 300 220-3 and EN 301 489-3

Transmitter

Output power

+10dBm (10mW) ±1dB nominal (factory adjustable 1 - 25mW) and

+20dBm (100mW) ±1dB nominal (factory adjustable 25 - 100mW)

Peak deviation

±3kHz (±1.5kHz @ 12.5kHz channel spacing)

TX on switching time

30ms from TXE transition

Modulation type

FSK (F3D)

TX modulation bandwidth

DC – 5kHz (3V CMOS compatible)

Adjacent channel TX power

<-37dBm

TX spurious

<-40dBm (no RF output in Standby)

Supply

Voltage

3.1V – 15V (10 – 25mW)

4.1V – 15V (25 – 100mW);

Current

34mA nominal transmit (@10mW)

90mA nominal transmit (@100mW)

<8

µA standby (TXE high or floating)

Inputs

data (CMOS/TTL compatible)

Size

33 x 23 x 9mm

Interface

User

10 (8) pin 0.1" pitch dual row (5+5) header

RF

2pin 0.1” pitch

Recommended PCB hole size

1.2mm

Receiver

Sensitivity

-118dBm for 12dB SINAD

S/N ratio

35dB (min), 40dB (typ) on AF output

AF bandwidth (-3dB)

4kHz

image

<-60db

Othr spurious

<-70dbm

Blocking

Better than 84dB

Adjacent channel

<-60dB

LO re-radiation

-70dBm

Supply

Voltage

3.1V – 15V

Current

20mA receive

<1

µA standby (RXE low)

Outputs

RSSI, audio, data (quasi DC data recovery circuit)

Size

46 x 23 x 9 mm

Interface

User

10 pin 0.1" pitch dual row (5+5) header

RF

2pin 0.1” pitch

Recommended PCB hole size

1.2mm