Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Frequency_drift> ?p ?o. }
Showing items 1 to 23 of
23
with 100 items per page.
- Frequency_drift abstract "In electrical engineering, and particularly in telecommunications, frequency drift is an unintended and generally arbitrary offset of an oscillator from its nominal frequency. Causes may include component aging, changes in temperature that alter the piezoelectric effect in a quartz crystal, or problems with a voltage regulator which controls the bias voltage to the oscillator. Frequency drift is traditionally measured in Hz/s.On a radio transmitter, frequency drift can cause a radio station to drift into an adjacent channel, causing illegal interference. Because of this, Frequency allocation regulations specify the allowed tolerance for such oscillators in a type-accepted device. A temperature-compensated, voltage-controlled crystal oscillator (TCVCXO) is normally used for frequency modulation.On the receiver side, frequency drift was mainly a problem in early tuners, particularly for analog dial tuning, and especially on FM, which exhibits a capture effect. However, the use of a phase-locked loop (PLL) essentially eliminates the drift issue. For transmitters, a numerically controlled oscillator (NCO) also does not have problems with drift.Drift differs from Doppler shift, which is a perceived difference in frequency due to motion of the source or receiver, even though the source is still producing the same wavelength. It also differs from frequency deviation, which is the inherent and necessary result of modulation in both FM and phase modulation.".
- Frequency_drift wikiPageID "5439832".
- Frequency_drift wikiPageRevisionID "581886287".
- Frequency_drift hasPhotoCollection Frequency_drift.
- Frequency_drift subject Category:Broadcast_engineering.
- Frequency_drift subject Category:Communication_circuits.
- Frequency_drift type Artifact100021939.
- Frequency_drift type Circuit103033362.
- Frequency_drift type CommunicationCircuits.
- Frequency_drift type Device103183080.
- Frequency_drift type ElectricalDevice103269401.
- Frequency_drift type Instrumentality103575240.
- Frequency_drift type Object100002684.
- Frequency_drift type PhysicalEntity100001930.
- Frequency_drift type Whole100003553.
- Frequency_drift comment "In electrical engineering, and particularly in telecommunications, frequency drift is an unintended and generally arbitrary offset of an oscillator from its nominal frequency. Causes may include component aging, changes in temperature that alter the piezoelectric effect in a quartz crystal, or problems with a voltage regulator which controls the bias voltage to the oscillator.".
- Frequency_drift label "Frequency drift".
- Frequency_drift sameAs m.0dlzzq.
- Frequency_drift sameAs Q5502869.
- Frequency_drift sameAs Q5502869.
- Frequency_drift sameAs Frequency_drift.
- Frequency_drift wasDerivedFrom Frequency_drift?oldid=581886287.
- Frequency_drift isPrimaryTopicOf Frequency_drift.