EW
N
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
Issue 3, 14 September 2007
BiM1, TX1H
VHF Narrow Band FM transceiver
The BiM1 transceiver modules offer a
100mW RF output VHF data link in
Radiometrix transceiver standard
pin-out and footprint. This makes the
BiM1 ideally suited to those low
power applications where existing
wideband
transceivers
provide
insufficient range.
Features
•
•
•
•
•
•
•
•
•
•
Conforms to EN 300 220-3 and EN 301 489-3 (10mW version only)
Standard frequency 151.300MHz
Other frequencies from 120MHz to 180MHz
Available separately as BiM1T transmitter and BiM1R receiver
TX1H is a BiM1T in TX1 pin-out
Data rates up to 10kbps for standard module
Usable range over 10km
Fully screened
Feature-rich interface (RSSI, analogue and digital baseband
Low power requirements
Figure 1: BiM1-151.300-10
The BiM1 is a half duplex radio transceiver module for use in long range bi-directional data transfer
applications at ranges up to 10kilometres. The module operates on the UK licence exempt frequency of
173.225/173.250MHz with 10mW RF output and Australian frequency of 151.300MHz with 100mW RF
output. The small footprint of 23 x 33mm and low profile of 10mm together with low power
requirements of <80mA (for 100mW) at 3.8V enables convenient PCB installation. BiM1 is also
available as separate BiM1T transmitter and BiM1R receiver which can be used as dual-in-line
equivalents of TX1 transmitter and RX1 receiver respectively.
Applications
•
•
•
•
•
•
•
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
Technical Summary
•
•
•
•
•
•
•
•
Size: 33 x 23 x 10mm
Operating frequency: 151.300MHz
Supply range: 100mW Transmitter 3.8V - 15V, Receiver: 3.0V-15V
Supply range: 10mW Transmitter 3.0V - 15V, Receiver: 3.0V-15V
Current consumption: 80mA transmit @ 100mW, 8mA receive
Data bit rate: 10kbps max. (standard module)
RSSI output with >60dBm range
10kbps, -120dBm sensitivity (for 12 dB SINAD)
BiM1 transceiver, TX1H high power transmitter data sheet
Page 1
Radiometrix Ltd.,
Figure 2: BiM1-151.300-10
BiM1 transceiver contains BiM1T transmitter circuit and BiM1R receiver circuit with their
RF output and input connected to a common RF pin via an internal RF switch.
TX1H transmitter circuit is the BiM1T transmitter circuit in the TX1 pin-out with slightly
enlarged dimension to accommodate extra Power Amplifier circuit to produce 100mW RF
output.
Radiometrix Ltd.,
BiM1 transceiver, TX1H high power transmitter data sheet
Page 2
Figure 3: TX1H block diagram
Functional description
The transmit section of the BiM1 consists of a frequency modulated Voltage Controlled Crystal
Oscillator (VCXO) feeding a frequency doubler with two stage amplifier and RF filter. Final Power
Amplifier stage is factory pre-set to appropriate band power level. Operation is controlled by a Tx Select
line, the transmitter achieving full RF output typically within 5ms of this line being pulled low. The RF
output is filtered to ensure compliance with the appropriate radio regulations and fed via a fast Tx/Rx
changeover switch to the 50Ω antenna pin.
The receive section is a double conversion FM superhet with IF at 21.4MHz and 455kHz fed by a Low
Noise Amplifier (LNA) on the RF front-end. The receiver is controlled by RX Select line and will power
up typically <2ms. Quadrature detector output is available as Audio Frequency (AF) output and
transmitted digital data is regenerated from AF using adaptive data slicer. A Received Signal Strength
Indicator (RSSI) output with some 60dB of range is provided.
User interface
side view (through can)
side view (with can)
10 mm
top view (without can)
RF GND 1
Antenna 2
RF GND 3
4
5
No pin
6
7
8
0 Volt
9
30.48 mm
33 mm
18
17
16
15
14
13
12
11
10
0 Volt
Vcc
RX select
TX select
TXD
AF
RXD
RSSI
0 Volt
23 mm
recommended PCB hole size: 1.2 mm
module footprint size: 25 x 32 mm
pin pitch: 2.54 mm
pins 4, 5, 6, 7 & 8 are not fitted
43mm
Figure 4: BiM1 pin-out and dimension
5mm
14.5mm
TX1H
pin spacing:
2.54 mm
15.24 mm
1 = RF gnd
2 = RF out
3 = RF gnd
4 = En
5 = Vcc
6 = 0V
7 = TXD
1
2
3
4
5
6
7
7 holes of 0.7 mm dia.
pin spacing 2.54 mm
Figure 5: TX1H pin-out and dimension
Weight:
11g (BiM1), 5g (TX1H)
Radiometrix Ltd.,
BiM1 transceiver, TX1H high power transmitter data sheet
Page 3
BiM1 Pin
1, 3, 9, 10, 18
17
16
15
14
13
12
TX1H pin
1, 3, 6
5
-
4
7
-
-
Name
0V
VCC
RX
TX
EN
TXD
AF
RXD
11
NOTES:
-
RSSI
Function
Ground
3.8 – 15V DC power supply
Pull low to enable Receiver
Pull low to enable Transmitter
Pull high to enable Transmitter
DC coupled input for 3V CMOS logic. R
in
= 100kΩ
500mV
pk-pk
audio. DC coupled, approx 0.8V bias
Received Data output from the internal data slicer. Output will have
a rail to rail output swing (i.e. 0 -Vcc depending on the supply
voltage). Suitable for Biphase codes
DC level between 0.5V and 2V. 60dB dynamic range
1. RX and TX have internal (10kΩ approx.) pull-up to Vcc
2. EN pin should not be left floating
3. For Vcc greater than 9V, transmit duty cycle must be limited to 25% or less
4. Avoid RX and TX both low: undefined module operation (but damage will not result)
5. A 10mW UK version is available on 173.225MHz. (3-16V operation, 10mA TX)
6. Pin out is as BiM2. On RF connector end only pins 1, 2, 3, 9 are present.
Absolute maximum ratings
Exceeding the values given below may cause permanent damage to the module.
Operating temperature
Storage temperature
RF in (pin 1)
All other pins
-10°C to +60°C
-30°C to +70°C
±50V
@ <10MHz, +13dBm @ >10MHz
-0.3V to +16.0V
Performance specifications:
(Vcc = 3.8V / temperature = 20
°
C unless stated)
General
DC supply
Supply voltage
(100mW BiM1T)
Supply voltage
(10mW BiM1T, BiM1R)
TX Supply current (100mW)
TX Supply current (10mW)
RX Supply current
Antenna pin impedance
RF centre frequency (100mW)
RF centre frequency (10mW)
Channel spacing
Number of channels
Transmitter
RF
RF power output (100mW)
RF power output (100mW)
Spurious emissions (100mW)
Spurious emissions (10mW)
Adjacent channel TX power (100mW)
Adjacent channel TX power (10mW)
Frequency accuracy
FM deviation (peak)
Baseband
Modulation bandwidth @ -3dB
TXD input level (logic low)
TXD input level (logic high)
Dynamic timing
TX select to full RF
Radiometrix Ltd.,
pin
17
17
17
17
17
2
min.
3.8
3.0
typ.
-
-
80
25
8
50
151.300
173.225
25
1
max.
15
16
units
V
V
mA
mA
mA
Ω
MHz
MHz
kHz
notes
2
2
2
2
+19
+9
-2.5
±2.5
0
14
14
+20
+10
-40
EN 300 220-3
-37
TBD
0
±3.0
0
3.0
5
+21
+11
dBm
dBm
dBm
dBm
dBm
kHz
kHz
kHz
V
V
ms
1
1
2
2
3
4
5
5
+2.5
±3.5
5
BiM1 transceiver, TX1H high power transmitter data sheet
Page 4
General
Receiver
RF/IF
RF sensitivity @ 12dB SINAD
RF sensitivity @ 1ppm BER
RSSI threshold
RSSI range
IF bandwidth
Blocking
Image rejection
Adjacent channel rejection
Spurious response rejection
LO leakage, conducted
LO leakage, radiated
Baseband
Baseband bandwidth @ -3dB
AF level
DC offset on AF out
Distortion on recovered AF
Load capacitance, AF / RXD
Dynamic timing
Power up with signal present
Power up to valid RSSI
Power up to stable AF output
Power up to stable RXD output
Signal applied with supply on
Signal to valid AF
Signal to stable data
Time between data transitions
Mark : space ratio
pin
2, 13
2, 12
2, 11
2, 11
2
2
2
2
min.
typ.
-120
-115
-127
60
85
60
70
65
-70
-60
5
400
0.8
TBD
TBD
max.
units
dBm
dBm
dBm
dB
kHz
dB
dB
dB
dB
dBm
dBm
kHz
mV
P-P
V
%
pF
notes
2
3
3
13
13
13
12
12,13
7
16, 11
16, 13
16, 12
2, 11
2, 12
12
12
20
TBD
2
10
TBD
TBD
50
0.1
80
ms
ms
ms
ms
ms
%
8
8
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Measured into 50Ω resistive load.
Exceeds EN/EMC requirements at all frequencies.
Total over full supply and temperature range.
With 0V – 3.0V modulation input.
To achieve specified FM deviation.
See applications information for further details.
For received signal with
±3kHz
FM deviation.
For 50:50 mark to space ratio (i.e. squarewave).
Radiometrix Ltd.,
BiM1 transceiver, TX1H high power transmitter data sheet
Page 5
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