Functional description
The TX2S transmitter module is a crystal based PLL controlled FM transmitter operating between 2.2V
and 4V and is available on European licence exempt UHF frequencies. The TX2S module is type approved
to EN 300 220-3 for European use and delivers nominally +0dBm at 7mA. The module measures 20 x 10 x
2 mm.
5
VCC 2.2 -- 4V
433.92 MHz
band pass
filter
ref
osc
35kHz
LPF
buffer
32
÷
φ
1
V C O
4
RF out
TXD
Loop
Filter
2
RF gnd
3
0V
Fig. 2: TX2S block diagram
Fig. 3: TX2S pinout
Fig 4: physical dimensions
Radiometrix Ltd, TX2S/TX3S Data Sheet
page 2
RADIOMETRIX [ RADIOMETRIX LTD ]
