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30 result(s) found where the letter starting with "T"

TAI
International Atomic Time.
 

TCG
Time Code Generator.
 

TCP/IP
Transmission Control Protocol/Internet Protocol.
 

TCVCXO
Temperature compensated voltage controlled crystal oscillator.
 

TCXO
Temperature Compensated Crystal Oscillator.
 

TDEV
Time DEViation.
 

TDOP
Time Dilution of Precision.
 

Temperature
As applied to crystal oscillators, temperature is specified in degrees Celsius. Normally the center of all temperature ranges is +25 degrees Celsius.
 

Temperature compensation
A technique used to stabilise the frequency of a crystal oscillator over a specified temperature range. The temperature range and the limits of frequency change are specified.
 

Temperature stability
The ability of the oscillator to maintain its design frequency over a temperature range. This is usually specified as a maximum variation of plus and minus parts per million over the specified temperature range.
 

Terrestrial Time (TT)
The new 1991 International Astronomical Union replacement for what was once called Ephemeris Time. On 1 January 1997, TT = TAI + 32.184 seconds, and the length of the second is chosen so that it agrees with the International Second (SI) on the geoid. The TT scale differs from the old Ephemeris Time in its conceptual definition. Practically, however, it is realized by means of International Atomic Time (TAI).
 

Test load impedance
Usually identical to the load impedance, this is the characteristic of the external circuit connected to the oscillator during performance testing.
 

THD
See total harmonic distortion.
 

TIA/EIA
Standard Mobile Station-Base Station compatibility standard for wideband spread spectrum cellular systems.
 

TIE
Time Interval Error.
 

Time code
A system of symbols (digital or analog) used for identifying specific instants of time. An information format used to convey time information.
 

Time interval
The duration between two instants read on the same time scale.
 

Time scale
A system of unambiguous ordering of events. A time scale is meant to be stable and homogeneous.
 

Time stability
See frequency ageing.
 

Time standard
A continuously operated device used for the realization of a time scale in accordance with the definition of the second and with an appropriately chosen origin.
 

Time step
A discontinuity in a time scale at some instant. A step is positive (+) if the time scale reading is increased and negative (-) if the reading is decreased at that instant.
 

Tolerance
The allowable variation in specified parameters where the oscillator is considered to be within operating specifications.
 

Total harmonic distortion
The remaining signal appearing at the output of the oscillator after the signal at the operating frequency is subtracted. It is expressed in percent of the rms value signal at the operating frequency. This term only applies to sine wave output wave forms
 

Transfer function
See Deviation slope polarity.
 

Tri-state output
A definition of the ability to turn the output signal on and off. It must include a definition of the off state (logic high, logic low, high impedance, etc.)
 

Trimmer
A mechanical device used to tune the crystal oscillator. It may be a variable capacitor or some other suitable device.
 

TSG
Timing Signal Generator.
 

TTL
An output signal format defined as a rectangular wave capable of driving a multiple of TTL loads. It has a positive signal peak greater than +2.4 volts and a negative signal peak less than +0.5 volts. The number of loads must be specified.
 

TU-T
International Telecom Union -Telecom Standardization Sector.
 

TVAR
Time VARiance.