TransCore Amtech IT2200, Installation Maintenance And Service Manual

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Service Guide
3-10
Check Tag Connector
This Type N RF connector links the check tag, which is housed inside the RF module
and is used to test the reader system, to its accompanying antenna.
Data Connector
This connector links the RF module to the reader logic card. Data transfer between the
reader logic card and the tag occurs through this data connector. The interface to the
reader logic card is connected using the RF module interface connector.
Power Supply Connector
This connector provides the primary power for the RF module. The power interface is
19 to 28 VAC or 16 to 28 VDC. It typically connects to a power supply in the host lane
controller system.
Functions
The RF module sends the RF signal to the antenna, receives the modulated tag signal,
demodulates, amplifies, and filters the received tag signal, then forwards the digital
data to the reader for processing. This technique is known as modulated backscatter.
The RF module transmits the modulated signal at a reader-set discrete frequency
within the 902- to 904-MHz and 909.75- to 921.75-MHz frequency bands. The
transmitted signal is then received by a selected tag that backscatters or re-radiates the
signal and modulates the signal to reflect tag information.
Features
The RF module features include the following:
•
FCC Part 90 type accepted and Part 15 verified
•
Two RF sources, one to downlink (write) and one to uplink (read)
•
Programmable RF—The transmitted carrier frequency can be adjusted. However,
this can be performed only by trained, authorized dealers or service personnel.
•
Programmable RF power—Programmable control of RF output power is possible.
•
RF operation—Two-antenna (bistatic) operation for enhanced performance
•
Phase-lock loop (PLL) synthesizer with 250-kHz steps programmable
•
One-watt (W) maximum power output to each channel (downlink and uplink)
•
Power attenuation is programmable in 1dB steps to -15dB by digital-to-analog
converter control of each channel
•
Check tag integrated into RF module with separate check tag antenna
•
Three-channel differential receiver with pre-amplifier