jitter


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jitter

(jĭt'ĕr),
The random variability of the cycle-to-cycle duration of vocal fold vibration; contributes to the perception of a rough or harsh voice quality.
Imaging Low amplitude irregularities in echo location on an ultrasound display, attributed to electronic noise, mechanical disturbances, and other nonspecific variables
Physiology Muscle jitter The normal electric variability—‘chaos’—measured by single-fiber EMG—in the interval between 2 action potentials of successive discharges of the same single muscle fiber in the same motor unit; jitter is characterised as instability in subcomponents of motor unit action potentials, and is due to the variation in the synaptic delay at the branch points in the distal axon and at the neuromuscular junction; like fiber density, jitter is increased in neuropathic conditions (motor neuron diseases)—e.g., myasthenia gravis—is accompanied by denervation and reinnervation, and attributed to inefficient transmission of impulses in recent neural collaterals, or due to blocking—abnormal neuromuscular transmission; it is normal or near-normal in myopathic disease
Psychology See Jitters

jitter

Imaging Low amplitude irregularities in echo location on an ultrasound display, attributed to electronic noise, mechanical disturbances, and other variables Neurophysiology Muscle jitter The normal electric variability–'chaos'–measured by single-fiber EMG–in the interval between 2 action potentials of successive discharges of the same single muscle fiber in the same motor unit; jitter is characterized as instability in subcomponents of motor unit action potentials, and is due to the variation in the synaptic delay at the branch points in the distal axon and at the neuromuscular junction; like fiber density, jitter is ↑ in neuropathic conditions–motor neuron diseases–eg, myasthenia gravis, is accompanied by denervation and reinnervation, and attributed to inefficient transmission of impulses in recent neural collaterals, or due to blocking–abnormal neuromuscular transmission; it is normal or near-normal in myopathic disease. See Fiber density, Single-fiber electromyography PsychologyJitters, see there.
References in periodicals archive ?
In conjunction with Jitter Measurement provides peak-to-peak jitter value for a given frequency at the system output
The best way to compare PLLs of each vendor is to do a jitter bandwidth test because the PLL operation is critical to the working of a SerDes.
5th Generation ASIC Technology for Ultra Low Jitter
If this signal is to be passed to downstream devices, it must be amplified and the jitter eliminated or attenuated.
The jitters result mainly from oscillations of Hubble's electricity-providing solar panels.
The Si5317 effectively removes unwanted noise on any clock frequency from 1 to 710 MHz and produces two ultra-low jitter output clocks at the same frequency as the input.
No Jitter is produced by the same team that presents the industry's leading conference and exhibition events, the VoiceCon series.
BER-based jitter measurement has long been the gold standard in measuring TJ, and for the first time is used to perform jitter separation of TJ into Random Jitter (RJ) and the many contributing components of Deteministic Jitter (DJ).
JDSU significantly enhanced the ONT product line's intrinsic jitter performance in response to market demand for the accurate validation of very low-level jitter generation based on peak-to-peak and root mean square (RMS) jitter requirements.
In addition, the 17500C model includes extensive capabilities for performing jitter and interference tolerance testing as required by many standards.