External aerial

The provided antenna (rigid wire 173 mm long) is to be connected to the ANT terminal of the radio receiver and shaped so as to obtain optimal radio range.
If the radio range achieved is not considered enough, it can be increased by connecting the antenna outside the building and placing it within transmitter’s sight.
This can be done by connecting the antenna to the flashing light through a coaxial cable type RG58 (max. length 10 m).