FM TRANSMITTER & RECEIVER
MODULES. (2ND GENERATION)
FM-TX2-XXX
FM-RX2-XXX
Module test circuits
fig.5: TX2 test circuit
fig.6: RX2 test circuit
The PNP transistor enables a CMOS compatible Carrier Detect signal to be derived from pin 3. If no CD signal required
*
pin 3 should be connected directly to pin 5 (Vcc)
Module mounting considerations
The modules may be mounted horizontally or vertically on an area of ground plane preferably
close to the antenna to minimise feed length. The receiver and it’s antenna should be kept away
from sources of interference (micro’s, SMPS etc.). The modules may be potted if required in a
viscous compound which can not enter the screen can..
Warning: Do NOT wash the modules. They are not hermetically sealed.
DS000022
Rev D July ‘99
Ó1999 REG No 277 4001, ENGLAND.
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