Jitter is the deviation from true periodicity of a presumed periodic signal in electronics and telecommunications, often in relation to a reference clock source. It is the deviation from true periodicity of a presumed periodic signal in electronics and telecommunications
Packet jitter is expressed as an average of the deviation from the network mean latency. However, for this use, the term is imprecise. The standards-based term is  packet delay variation  (PDV). PDV is an important quality of service factor in assessment of network performance. In clock recovery applications it is called timing jitter. Jitter can be quantified in the same terms as all time-varying signals, e.g., root mean square (RMS), or peak-to-peak displacement. Also like other time-varying signals, jitter can be expressed in terms of spectral density (frequency content). • JITTER (noun). The noun JITTER has 2 senses: 1. small rapid variations in a waveform resulting from fluctuations in the voltage supply or mechanical vibrations or other sources. 2. a small irregular movement. Familiarity information: JITTER used as a noun is rare. Dictionary entry details. Jitter. Jitter is the undesired deviation from true periodicity of an assumed periodic signal in electronics and telecommunications, often in relation to a reference clock source. Jitter may be observed in characteristics such as the frequency of successive pulses, the signal amplitude, or phase of periodic signals. 3.1 Mean packet to packet delay variation. Packet to packet delay variation is used as a basis for the RTCP (RFC1889) jitter measurement. If the delay of two successive packets is t1 and t2 then the packet to packet delay variation is abs(t2-t1). (i) Type A – constant jitter. This is a roughly constant level of packet to packet delay variation. (ii) Type B – transient jitter. This is characterized by a substantial incremental delay that may be incurred by a single packet. 1 Introduction. Jitter is a variation in packet transit delay caused by queuing, contention and serialization effects on the path through the network. In general, higher levels of jitter are more likely to occur on either slow or heavily congested links. (i) Type A – constant jitter. This is a roughly constant level of packet to packet delay variation. (ii) Type B – transient jitter. This is characterized by a substantial incremental delay that may be incurred by a single packet. Jitter is the deviation from true periodicity of a presumed periodic signal in electronics and telecommunications, often in relation to a reference clock source. Jitter may be observed in characteristics such as the frequency of successive pulses, the signal amplitude, or phase of periodic signals. Jitter is a significant, and usually undesired, factor in the design of almost all communications links (e.g., USB, PCI-e, SATA, OC-48). In clock recovery applications it is called timing jitter. Jitter can be quantified in the same terms as all time-varying signals, e.g., root mean square (RMS), or peak-to-peak displacement. Also like other time-varying signals, jitter can be expressed in terms of spectral density (frequency content). Avaya Aura. Jitter is any deviation in, or displacement of, the signal pulses in a high-frequency digital signal. The deviation can be in terms of amplitude, phase timing or the width of the signal pulse. Among the causes of jitter are electromagnetic interference (EMI) and crosstalk with other signals. Jitter can cause a display monitor to flicker, affect the ability of the processor in a desktop or server to perform as intended, introduce clicks or other undesired effects in audio signals, and loss of transmitted data between network devices.
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what does jitter mean