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Glossary-2 Acutime 2000 Synchronization Kit User Guide
Glossary
ASCII American Standard Code for Information Interchange. A
standard set of 128 characters, symbols and control codes
used for computer communications. ASCII characters
require 7 bits of data to send, but are often sent 8 bits at a
time with the extra bit being a zero.
auto GPS mode A procedure of automatically determining either a 2-D or 3-
D position using signals received from GPS satellites. The
solution automatically transitions between 2-D and 3-D
depending on the number of satellites available, the PDOP
of the available satellites, and the defined PDOP switch
value. (See PDOP and PDOP constellation switch).
azimuth angle The angle of the line-of-site vector, projected on the
horizontal plane, measured clockwise from true North.
bandwidth The range of frequencies occupied by a signal. Also, the
information carrying capability of a communication channel
or line.
baud A measure of the speed of data transmission. Baud and bit
rate are the same for direct equipment interconnections (for
example, through RS-232). Baud and bit rate are not the
same for modulated data links, whether wire or radio.
bit Binary digit. The smallest unit of information into which
digital data can be subdivided and which a computer can
hold. Each bit has only two values (e.g., on/off, one/zero,
true/false).
bit rate The rate at which bits are transmitted over a communication
path. Normally expressed in bits per second (bps).
byte A set of contiguous bits that make up a discrete item of
information. A byte usually consists of a series of 8 bits, and
represents one character.