LMT1-144-5(2012) View Datasheet(PDF) - Radiometrix Ltd
Part Name
Description
Manufacturer
LMT1-144-5 Datasheet PDF : 10 Pages
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The antenna choice and position directly controls the system range. Keep it clear of other metal in the
system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is often
not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an internal
antenna must be used, try to keep it away from other metal components, particularly large ones like
transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as the
antenna itself.
410mm @ 173MHz
Whip antenna
R
wire, rod, PCB track
F
or a combination of these
length(mm) = 71250 / freq(MHz)
Helical antenna
35-40 turns wire spring
R
F
length 120mm, dia 10mm
trim wire length or expand coil for
best results
Ctune
Loop antenna
Figure 7: Antenna types
RF
C match
track width = 1mm
min. area 500mm2
capacitors may be variable or fixed
(values depend on loop dimensions)
RF GND
Ordering Information:
Part No.
LMT1-144-5
LMR1-144-5
Description
Transmitter
Receiver
Channel Frequencies (MHz)
CH0:144.000 – CH31:144.775
RF
power
(mW)
100
Channel
Spacing
(kHz)
25
Data
rate
kbps
5
LMT1-151-5
LMR1-151-5
Transmitter
Receiver
CH0:150.825 – CH31:151.600
100
25
5
LMT1-151-5-12k5-MURS Transmitter CH0:150.820, CH1:150.880,
100
LMR1-151-5-12k5-MURS Receiver
CH2:151.940, CH3:154.570,
12.5
5
CH4:154.600
LMT1-156.525-PM
Transmitter 156.525MHz
100
25
2.6V
pk-pk
2.1kHz
LMT1-173-5
LMR1-173-5
Transmitter CH0:173.250 – CH3:173.325
10
Receiver
CH4 – CH7:173.225
25
5
CH8 – CH31:173.325
LMT1-173-5-12k5-FCC
Transmitter CH0:173.20375, CH1:173.210, 100
LMR1-173-5-12k5-FCC Receiver
CH2:173.2375, CH3:173.2875,
CH4:173.3125, CH5:173.3375,
12.5
5
CH6:173.3625, CH7:173.39625
LMT1-xxx-5
LMR1-xxx-5
Where xxx is any 2MHz band from 130MHz to- 10/100
180MHz
25
5
Radiometrix Ltd
LMT1/LMR1 Data Sheet
page 9
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