System Components
3-5
IT2020 Reader Logic Card
The IT2020 Reader Logic Card is a full-size ISA card, bus-operated, modular
component (see Figure 3-2). The IT2020 Reader Logic Card communicates with a
governing device, such as a lane controller or personal computer (PC), using
application-specific software. Readers control the two-way communications with any
tags that are compatible with the IT2200 protocol. All reader commands and logic
functions are incorporated into a single IT2020 Reader Logic Card. The IT2020
Reader Logic Card is housed within a lane controller or PC chassis, eliminating the
need for stand-alone readers. The IT2020 Reader Logic Card requires two adjacent
slots in the host PC.
Figure 3-2 IT2020 Reader Logic Card
Functions
The IT2020 Reader Logic Card establishes a direct interface with the lane controller
or PC and acts as a switchboard for communications between the ground-based
electronics and the mobile tags. The instructions executed by the reader logic card
determine the data flow and processing rates and perform read-only and read/write
transactions with tags.
The reader communicates with the tags over a radio frequency (RF) communications
link generated by the RF module and transmitted by the antenna. The communications
link uses a protocol specifically designed to minimize transaction time and provide the
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