User Manual

LIBRARY SECURITY PEDESTAL 2
5 Configuration
All configuration operations of L-SP2 systems are carried on with the L-SP2 Configuration Utility.
5.1 Understanding the L-SP2 Synchronization Process
To determine the status of each EAS anti-theft bit, each pedestal generates a short but substantial
radio frequency burst whose energy can interfere with other nearby EAS pedestals. To prevent this
interference, each pedestal must have a different synchronization setting than all the others in the
near vicinity so that only one antenna is generating an RF burst at any given time.
In the L-SP2, there is no interconnection between pedestals, so the synchronizing is carried on by
radio frequency.
• Only one device is defined to be the master who emits a synchronization burst.
• The other devices are configured as slaves and synchronize themselves on the master’s
burst and process their EAS detection task according to their assigned slave ID. Diagram
below describe some Master/Slaves configurations.
Default configuration of the L-SP2 is set to Master.
Figure 7: Minimum Configuration (1 Master / 1 Slave)
MASTER
SLAVE1
T
Pt
Synchronization burst
Synchronization burst: start burst to synchronize the gates (Period of T ms)
Processing time (Pt): depend on number and chips types to be detected
20/50 Revision 1.0 December 2004