User's Manual

Table Of Contents

RFI341 Radio Frequency Interrogator

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Host computer

The computer running software that interacts with the RFID and other

devices such as a warehouse management system.

Integrated Circuit

Inductive coupling

Method of creating a current in a conductor without connecting it directly to a

power source. A tag responses to a reader by inductively coupling with the

reader carrier signal.

Interference

Any environmental condition that creates electrical noise at the same

frequency as the communication signal.

Interrogator

Another term for a reader.

ITF

Interrogator Talks First

LSB

Least Significant Bit

Modulation index

An index equal to (a-b)/(a+b) where a and b are the peak and the minimum

signal amplitudes respectively.

MSB

Most Significant Bit

Passive RFID tag

Passive tags do not have an on-board powered transmitter. They are

activated by the electromagnetic waves of a reader.

PPM

Pulse Position Modulation

Reader

Also called an interrogator. The reader communicates with the RFID tag and

passes the information in digital form to a host computer system.

Read range

The distance from which a reader can communicate with a tag. The range is

influenced by the power of the reader, antenna size, transponder form factor

and environmental conditions.