Editing Jitter (section)

==Testing==
Jitter in serial bus architectures is measured by means of [[eye pattern]]s. There are standards for jitter measurement in serial bus architectures. The standards cover [[jitter tolerance]], [[jitter transfer function]] and [[jitter generation]], with the required values for these attributes varying among different applications. Where applicable, compliant systems are required to conform to these standards.

Testing for jitter and its measurement is of growing importance to electronics engineers because of increased clock frequencies in digital electronic circuitry to achieve higher device performance. Higher clock frequencies have commensurately smaller eye openings, and thus impose tighter tolerances on jitter. For example, modern computer [[motherboard]]s have serial bus architectures with eye openings of 160 [[picosecond]]s or less. This is extremely small compared to parallel bus architectures with equivalent performance, which may have eye openings on the order of 1000 [[picosecond]]s.

Jitter is measured and evaluated in various ways depending on the type of circuit under test.<ref name=slyusar>{{Cite news|author = M. Bondarenko and V.I. Slyusar.|title = Methods for estimating the ADC jitter in noncoherent systems. // Radioelectronics and Communications Systems. - Volume 54, Number 10, 2011. – Pp. 536 - 545. - DOI: 10.3103/S0735272711100037.
|url= http://slyusar.kiev.ua/en/IZV_2011_10.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://slyusar.kiev.ua/en/IZV_2011_10.pdf |archive-date=2022-10-09 |url-status=live}}</ref> In all cases, the goal of jitter measurement is to verify that the jitter will not disrupt normal operation of the circuit.

Testing of device performance for jitter tolerance may involve injection of jitter into electronic components with specialized test equipment.

A less direct approach—in which analog waveforms are digitized and the resulting data stream analyzed—is employed when measuring pixel jitter in [[frame grabber]]s.<ref>{{Cite web |last=Khvilivitzky |first=Alexander |title=Pixel Jitter in Frame Grabbers |date=2008 |url=http://www.sensoray.com/support/appnotes/pixjiter.htm |access-date=2015-03-09}}</ref>