BIM1 Datasheet, PDF (13/15 Pages) Radiometrix Ltd – VHF Narrow Band FM transceiver

Yagi. This antenna consists of two or more elements mounted parallel to each other on a central boom.
It is directional and exhibits gain but tends to be large and unwieldy – for these reasons the yagi is the
ideal choice for links over fixed paths where maximum range is desired.
Please note: Using a Yagi or other gain antenna with the BiM1 will exceed the maximum radiated
power permitted by UK type approval regulations. It can be used in the UK only in conjunction with the
BiM1R receiver.
For best range in UK fixed link applications use a half-wave antenna on BiM1T transmitter and a half-
wave or Yagi on BiM1R receiver, both mounted as high as possible and clear of obstructions.
Module mounting considerations
Good RF layout practice should be observed. If the connection between module and antenna is more
than about 20mm long use 50Ω microstrip line or coax or a combination of both. It is desirable (but not
essential) to fill all unused PCB area around the module with ground plane.
Variants and ordering information
The BiM1 transceiver is manufactured in the following variants as standard:
For Australian general applications on 151.300MHz
TX1H-151.300-10
Transmitter
BiM1T-151.300-10 Transmitter
BiM1R-151.300-10 Receiver
BiM1-151.300-10
Transceiver
For UK alarm applications on 173.225MHz:
BiM1-173.225-10
Transmitter
BiM1-173.225-10
Receiver
BiM1-173.225-10
Transceiver
For UK general applications on 173.250MHz:
BiM1-173.250-10
Transmitter
BiM1-173.250-10
Receiver
BiM1-173.250-10
Transceiver
Other variants can be supplied to individual customer requirements at frequencies from 151.300MHz to 173.250MHz
and/or optimised for specific data speeds and formats. However these are subject to minimum order quantity (MOQ)
and long lead time. Please consult the Sales Department for further information.
Some of the non-standard frequencies readily available. i.e. no MOQ or long lead time, are as follows:
Part number: BiM1-xxx.xxx-10 (where xxx.xxx is the operating frequency)
Frequency (MHz)
138.125
149.170
151.275
151.300
151.775
152.175
152.500
152.575
152.650
152.850
153.8125
153.9125
153.925
154.463
155.475
155.715
Radiometrix Ltd.,
Type approval
-
-
-
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Note
1, 2, 3
1, 2, 3
1, 2, 3
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
Frequency (MHz)
157.420
159.685
159.6875
161.975
162.025
162.975
163.000
164.525
167.420
169.435
169.41875
172.420
173.075
173.175
173.200
173.960
Type approval
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
BiM1 transceiver, TX1H high power transmitter data sheet
Note
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2, 3
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