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radio modules. LMT1 Datasheet

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radio modules. LMT1 Datasheet






LMT1 modules. Datasheet pdf. Equivalent




LMT1 modules. Datasheet pdf. Equivalent





Part

LMT1

Description

VHF Narrow Band FM Low Cost multi channel radio modules



Feature


NEW Radiometrix Hartcran House, 231 Ken ton Lane, Harrow, HA3 8RP, England Iss ue 1, 06 March 2008 Tel: +44 (0) 20 89 09 9595, Fax: +44 (0) 20 8909 2233 LMT 1/LMR1 VHF Narrow Band FM Low Cost mul ti channel radio modules The LMT1 trans mitter and LMR1 receiver modules offer a multi channel, low power, and reliabl e VHF data link. This makes the LMT1/LM R1 pair ideally su.
Manufacture

Radiometrix

Datasheet
Download LMT1 Datasheet


Radiometrix LMT1

LMT1; ited to those low power applications whe re existing wideband modules have insuf ficient range, or where low cost multi- channel operation is needed without com promising on RF specification or regula tory requirement. Features Figure 1: LMT1 transmitter and LMR1 receiver • Conforms to EN 300 220-3 and EN 301 48 9-3 • High performance double superhe t. PLL synthesizer wit.


Radiometrix LMT1

h TCXO • quasi-dc (peak sampling) data recovery circuit (for enhanced perform ance on unbalanced datastreams) • Dat a rates up to 5 kbps for standard modul e • Usable range over 1km • Fully s creened. Low profile • Feature-rich i nterface (RSSI, analogue and digital ba seband) • Re-programmable via RS232 i nterface • Low power requirements Ap plications • Handheld terminals .


Radiometrix LMT1

• EPOS equipment, barcode scanners • Data loggers • Industrial telemetry and telecommand • In-building environ mental monitoring and control • High- end security and fire alarms • DGPS s ystems • Vehicle data up/download • Heavy vehicle/machinery controls Tech nical Summary • Operating frequency: 173.200 - 173.325MHz (UK band) 150.825 - 152.450MHz (Australian Band) • Oth.

Part

LMT1

Description

VHF Narrow Band FM Low Cost multi channel radio modules



Feature


NEW Radiometrix Hartcran House, 231 Ken ton Lane, Harrow, HA3 8RP, England Iss ue 1, 06 March 2008 Tel: +44 (0) 20 89 09 9595, Fax: +44 (0) 20 8909 2233 LMT 1/LMR1 VHF Narrow Band FM Low Cost mul ti channel radio modules The LMT1 trans mitter and LMR1 receiver modules offer a multi channel, low power, and reliabl e VHF data link. This makes the LMT1/LM R1 pair ideally su.
Manufacture

Radiometrix

Datasheet
Download LMT1 Datasheet




 LMT1
NEW Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Issue 1, 06 March 2008
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
LMT1/LMR1
VHF Narrow Band FM Low Cost multi channel radio modules
The LMT1 transmitter and LMR1
receiver modules offer a multi channel,
low power, and reliable VHF data link.
This makes the LMT1/LMR1 pair ideally
suited to those low power applications
where existing wideband modules have
insufficient range, or where low cost
multi-channel operation is needed
without compromising on RF
specification or regulatory requirement.
Features
Figure 1: LMT1 transmitter and LMR1 receiver
Conforms to EN 300 220-3 and EN 301 489-3
High performance double superhet. PLL synthesizer with TCXO
quasi-dc (peak sampling) data recovery circuit (for enhanced performance on unbalanced
datastreams)
Data rates up to 5 kbps for standard module
Usable range over 1km
Fully screened. Low profile
Feature-rich interface (RSSI, analogue and digital baseband)
Re-programmable via RS232 interface
Low power requirements
Applications
Handheld terminals
EPOS equipment, barcode scanners
Data loggers
Industrial telemetry and telecommand
In-building environmental monitoring and control
High-end security and fire alarms
DGPS systems
Vehicle data up/download
Heavy vehicle/machinery controls
Technical Summary
Operating frequency: 173.200 - 173.325MHz (UK band)
150.825 - 152.450MHz (Australian Band)
Other VHF frequencies available
4 UK allocation channels (32 maximum)
Transmit power: +10dBm (10mW) nominal @ 3.1V (Adjustable 1 - 25mW)
+20dBm (100mW) nominal @ 4.1V (Adjustable 25 - 100mW)
Supply range: 3.1 – 15V (@10mW) transmitter and receiver
Current consumption: 34mA @ 10mW, 90mA @ 100mW (transmit) and 20mA (receive)
Data bit rate: 5kbps max. (Standard module)
Receiver sensitivity: -118dBm (for 12 dB SINAD)
Serial configuration by inverted RS232 at 3V CMOS level
Radiometrix Ltd
LMT1/LMR1 Data Sheet
page 1




 LMT1
Radiometrix Ltd
LMT1/LMR1 Data Sheet
page 2




 LMT1
Figure 3: LMT1 footpint (top view)
Pin description – LMT1
Pin Name
1a Vcc
2a 0V
3a TXE
4a TXD
5a No pin
Function
3.1 – 15V power supply (10mW)
4.1V – 15V power supply (100mW)
Ground
Transmit Enable (active low)
DC coupled input for 3V CMOS logic. Rin=47k
Not present in LMT1
1b P0/PGM
2b P1
3b P2
4b P3
5b No pin
Parallel Channel select LSB
Serial frequency programming / configuration1
Parallel Channel select
Parallel Channel select
Parallel Channel select MSB
Not present in LMT1
Notes:
1. Serial programming is by an inverted, CMOS logic level, 2400 baud RS232 datastream applied
to the P0 pin.
2. Channel select inputs have pullups (50k) to 3v internal rail. Do not exceed 3V logic levels on
this port.
3. Channel select inputs are active low
4. TXE has a 100kpullup to Vcc
5. All pins are on an 0.1" grid
6. The pins 5a/b are not present, but are included in footprint for compatibility with other units in
this family
7. In the 'off' state a PIN switch open circuits the RF output pin. There are no 'off' state spuri.
8. Unit will operate (with marginally reduced specifications and lower (6-8mW) output power)
from a 3.0V rail. This must be well regulated and without noise or ripple, as in this state the
unit's internal regulator no longer operates, and provides no supply rejection.
9. 100mW versions should not be run continuously from supply voltages > 9v
Radiometrix Ltd
LMT1/LMR1 Data Sheet
page 3



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