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SASL Installation Guide V1.11 - Part # ITCS-A-100-001v1.11 May 2009
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SASL OVERVIEW
SASL is a multi-protocol, multi-regional Radio Frequency Signal Acquisition & Source Location unit,
which is used to Identify and locate RFID tags operating in the UHF 860 – 960 MHz frequency
band. A number of SASL units may be used together with an ITCS Location Processor to form an
Intelligent Tracking and Control System (ITCS). SASL comprises an embedded multi-protocol,
multi-regional RFID reader/writer transceiver connected to the patented steerable phased array
antenna system. SASL is designed to operate from AC mains power and communicates with a host
computer using standard Ethernet TCP/IP and UDP protocol. Figure 1 illustrates the three versions
of SASL currently available. All three versions are equipped with identical RFID reader and Array
Controller.
• ITCS-A-100 is constructed using four Bi-directional Electronically Steerable Phased Arrays
(BESPA™) arranged to provide a single array with a circularly polarized gain of 8.6dBi.
• ITCS-A-102 is constructed using two BESPAs arranged to provide a single array with a
circularly polarized gain of 7.5dBi.
• ITCS-A-104 is constructed from two pairs of BESPAs in the form of a ‘V’, each having a
circularly polarized gain of 7.5dBi. The arrays are mounted back to back so as to illuminate
a volume in opposite directions. The two arrays are fed from a single reader/writer and an
Array Controller, multiplexed so that opposite directions are alternately scanned. The
multiplexing of the separate arrays occurs at a sufficiently fast rate so to be indiscernible to
the user.
The particular units used in an installation will depend on the system design and determined by a
qualified applications engineer. For example, an ITCS-A-104 would typically be ceiling mounted in
the middle of a warehouse to extend the coverage of an ITCS system in two directions. The three
models may be intermixed as required in a single ITCS system.
ITCS-A-100 ITCS-A-102 ITCS-A-104
Figure 1
SASL (Signal Acquisition and Source Location) units