Tektronix 071-0590-00 user manual Bit Rate, Byte, Channel, Clock, Error Detection, Line

Glossary

Bit Rate

The number of bits of data transmitted over a phone line per second.

Byte

A unit of 8 bits.

Channel

A communications path or the signal sent over a channel. Through multiplexing several channels, voice channels can be transmitted over an optical channel.

Clock

1.An electronic component that emits consistent signals that paces a computer’s operations. 2. An oscillator-generated signal that provides a timing reference for a transmission link. A clock provides signals used in a transmission system to control the timing of certain functions, such as the duration of signal elements or the sampling rate. It also generates periodic, accurately spaced signals used for such purposes as timing, regulation of the operations of a processor, or generation of interrupts. A clock has two functions: to generate periodic signals for synchronization on a transmission facility, and to provide a time base for the sampling of signal elements. In computers, a clock synchronizes certain procedures, such as communication with other devices.

Error Detection

Checking for errors in data transmission. A calculation is made on the data being sent and the results are sent along with it. The receiving station then performs the same calculation and compares its results with those sent. ...Code in which each data signal conforms to specific rules of construction so that departures from this construction in the received signals can be automatically detected. Any data detected as being in error is either deleted from the data delivered to the destination, with or without an indication that such deletion has taken place, or delivered to the destination together with an indication that is has been detected as being in error.

Error Rate

The ratio of the number of data units in error to the total number of data units.

ES

An acronym for Errored Second. A second with at least one error.

GPIB

A physical layer interface standard for the interconnection of equipment.

Line

The portion of a transmission line between two multiplexers.

LOF

An acronym for Loss of Frame.

LOS

An acronym for Loss of Signal.

glossary-2 GB1400 User Manual