All Topics  
Drift (telecommunication)

 

 
   Email Print
   Bookmark   Link
 

 

Drift (telecommunication)
 
 
  Topics Drift (telecommunication) Topic Home

In telecommunication
Telecommunication

Telecommunication is the assisted Transmission of Signal over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, Drum , Semaphore line, flag signals or heliograph....
, a drift is a comparatively long-term change in an attribute, value, or operational parameter of a system
System

System is a set of interacting or interdependent entities, real or abstract, forming an integrated whole.The concept of an "integrated whole" can also be stated in terms of a system embodying a set of relationships which are differentiated from relationships of the set to other elements, and from relationships between an element of the se...
 or equipment.

The drift should be characterized, such as "diurnal frequency drift
Frequency drift

In electrical engineering, and particularly in telecommunications, frequency drift is an unintended and generally arbitrary offset of an oscillator from its Real versus nominal value frequency....
" and "output
Output

Output is the term denote either an exit or changes which exit a system and which activate/modify a process. It is an abstract concept, used in the model ing, system design and system exploitation....
 level drift."

Drift is usually undesirable and unidirectional, but may be bidirectional, cyclic, or of such long-term duration and low excursion rate as to be negligible.

Source: from Federal Standard 1037C
Federal Standard 1037C

Federal Standard 1037C, entitled Telecommunications: Glossary of Telecommunication Terms is a United States Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended....
 and from MIL-STD-188
MIL-STD-188

MIL-STD-188 is a series of U.S. military standards relating to telecommunications....


Drift is also common in pseudo-synchronised streaming applications, such as low-latency audio streaming over TCP/IP.






Discussion
Ask a question about 'Drift (telecommunication)'
Start a new discussion about 'Drift (telecommunication)'
Answer questions from other users
Full Discussion Forum



Encyclopedia


In telecommunication
Telecommunication

Telecommunication is the assisted Transmission of Signal over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, Drum , Semaphore line, flag signals or heliograph....
, a drift is a comparatively long-term change in an attribute, value, or operational parameter of a system
System

System is a set of interacting or interdependent entities, real or abstract, forming an integrated whole.The concept of an "integrated whole" can also be stated in terms of a system embodying a set of relationships which are differentiated from relationships of the set to other elements, and from relationships between an element of the se...
 or equipment.

The drift should be characterized, such as "diurnal frequency drift
Frequency drift

In electrical engineering, and particularly in telecommunications, frequency drift is an unintended and generally arbitrary offset of an oscillator from its Real versus nominal value frequency....
" and "output
Output

Output is the term denote either an exit or changes which exit a system and which activate/modify a process. It is an abstract concept, used in the model ing, system design and system exploitation....
 level drift."

Drift is usually undesirable and unidirectional, but may be bidirectional, cyclic, or of such long-term duration and low excursion rate as to be negligible.

Source: from Federal Standard 1037C
Federal Standard 1037C

Federal Standard 1037C, entitled Telecommunications: Glossary of Telecommunication Terms is a United States Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended....
 and from MIL-STD-188
MIL-STD-188

MIL-STD-188 is a series of U.S. military standards relating to telecommunications....


Drift is also common in pseudo-synchronised streaming applications, such as low-latency audio streaming over TCP/IP. Normally both ends of a streaming connection would stay in-sync with a master clock but TCP/IP does not provide this 'master clock' mechanism. Therefore applications running fixed clocks will drift apart over time and glitch
Glitch

A glitch is a short-lived fault in a system. The term is particularly common in the computing and electronics industries, and in circuit bending, as well as among players of video games, although it is applied to all types of systems including human organizations and nature....
es will occur. This is usually fixed by controlling jitter
Jitter

Jitter is an unwanted variation of one or more characteristics of a periodic Signalling in electronics and telecommunications. Jitter may be seen in characteristics such as the interval between successive pulses, or the amplitude, frequency, or phase of successive cycles....
 or drift, by slightly altering the clock speed at one end of the connection.

See also wander
Wander

In telecommunication, wander are long-term random variations of the significant instants of a digital Signalling from their ideal positions. Phase variations with a frequency content above 10 Hertz are considered jitter, while those with a frequency below 10 Hz are referred to as wander....