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
18 0 Volt
Antenna
2
Vcc
17
RF GND
3
RX select
16
4
5
6
7
8
9
15 TX select
14 TXD
13 AF
12 RXD
11 RSSI
10 0 Volt
23 mm
No pin
0 Volt
recommended PCB hole size: 1.2 mm
module footprint size: 25 x 32 mm
pin pitch: 2.54 mm
30.48 mm
33 mm
pins 4, 5, 6, 7 & 8 are not fitted
Figure 4: BiM1 pin-out and dimension
43mm
5mm
14.5mm
TX1H
pin spacing:
2.54 mm
15.24 mm
1 = RF gnd
2 = RF out
3 = RF gnd
4 = En
1
2
3
7
4
5
6
5 = Vcc
6 = 0V
7 = TXD
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
RADIOMETRIX [ RADIOMETRIX LTD ]
