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.

Glossary-2

Acutime 2000 Synchronization Kit User Guide

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Trimble Outdoors Part Number 45005-00-ENG, AcutimeTM2000 Synchronization Kit manual Ascii