A-3
Appendix A
Acronyms and Glossary
A
A/V audiovisual
A amp(s)
AAR Association of American Railroads
AC alternating current
ACK acknowledge (data valid)
active tag tag powered by a battery
antenna passive device that converts RF energy into magnetic energy (RF signal)
ASCII American Standard Code for Information Interchange
ATA American Trucking Association. This refers to a standard RF communications proto-
col and data storage method. ATA-type tags are read only.
AVI automatic vehicle identification
B
backscatter portion of an RF signal that is modulated by a tag and radiated back to the reader
baud measure of number of bits per second of a digital signal; for example, 9600 baud =
9600 bits per second
BDM background debugger mode
BIST built-in self test
bit The smallest unit of information, consisting of a 0 or 1 that is formed from binary digit
bps bits per second
byte binary character; for example, one 8-bit ASCII character
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