Technical Manual

Technical Manual RF Mono
Configuration v1.4 Page 18 of 47
6.2 Synchronization
When multiple RF Mono antennas are installed in the same shop, like in supermarket
checkouts or multiple entrance shops, one of the RF Mono antennas will be declared as
master and all other antennas, which are connected to the same field bus, will be slaves.
Also each antenna must be set to the correct timeslot value. The next sections will
explain these settings in more detail.
6.2.1 Master-slave configuration
Each RF Mono antenna is factory default delivered as Master antenna, which means they
will function out of the box when power is supplied to it. However, in a multiple antenna
setup, only one master is allowed on the field bus, thus making it necessary to declare
one antenna as Master and all other antennas as Slaves.
The Master selection must be done using Device Explorer after all antennas have been
connected and are receiving power supply.
If more than one master is active, the antennas will suffer from
increased noise levels, resulting in spontaneous alarms and decreased
sensitivity. Make sure only one Master is declared and all other
antennas are set to Slave.
The RF Mono antennas do not require any extra synchronization cables. All connected
antennas will receive all required signals through the UTP cables from the master
antenna.
If more than two (2) RFM antennas are installed, it is strongly
recommended to make the RFM antenna in the middle (or one closest to
the middle) the RFM master antenna. This will prevent long signal delay
between the RFM master antenna and the last RFM slave antenna.
Figure 8: Synchronization through UTP cable, center antenna is master
RFM SLAVE 4
RFM SLAVE 3
RFM SLAVE 2
RFM MASTER
RFM SLAVE 1
UTP
UTP
UTP
UTP
ALL SIGNALS ARE FORWARDED BY THE MASTER TRX ANTENNA THROUGH THE UTP CABLE TO THE SLAVES