LMR1-173-5 RADIOMETRIX, LMR1-173-5 Datasheet - Page 9

• Manufacturer Part Number: LMR1-173-5
• Description: RECEIVER, 173.20-173.325MHZ
• Manufacturer: RADIOMETRIX

Specifications of LMR1-173-5

• Rohs Compliant: YES

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.
Figure 7: Antenna types
Ordering Information:
Radiometrix Ltd
LMT1-173-5
LMR1-173-5
LMT1-151-5
LMR1-151-5
LMT1-144-5
LMR1-144-5
LMT1-173-5-12k5
LMR1-173-5-12k5
LMT1-151-5-12k5
LMR1-151-5-12k5
LMT1-173-10
LMR1-173-10
LMT1-xxx-5
LMR1-xxx-5
LMT1-xxx-PM
Whip antenna
Helical antenna
Part No.
Loop antenna
410mm @ 173MHz
C
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Receiver
Where xxx is any 2MHz band
from 130MHz to-180MHz
Where xxx is any 2MHz band
from 130MHz to-180MHz
tune
Description
RF GND
RF
R
F
C
R
F
match
173.225 - 173.325
173.225 - 173.325
150.825 - 152.450
150.825 - 152.450
144.000 - 145.000
144.000 - 145.00
173.225 - 173.325
173.225 - 173.325
150.825 - 152.450
150.825 - 152.450
173.225 - 173.325
173.225 - 173.325
Frequency band
capacitors may be variable or fixed
(values depend on loop dimensions)
LMT1/LMR1 Data Sheet
35-40 turns wire spring
length 120mm, dia 10mm
trim wire length or expand coil for
best results
track width = 1mm
min. area 500mm
wire, rod, PCB track
or a combination of these
length(mm) = 71250 / freq(MHz)
(MHz)
10
100
100
10
100
10
10/100
10/100
RF power
2
(mW)
25
25
25
25
25
25
12.5
12.5
12.5
12.5
25
25
25
25
25
Channel spacing
(kHz)
5
5
5
5
5
5
5
5
5
5
10
10
5
5
2.6Vpk-pk
2100Hz
Data rate
kbps
page 9