Editing Distortion (section)

==Teletypewriter or modem signaling==
In binary [[signaling]] such as [[Frequency-shift keying|FSK]], distortion is the shifting of the significant instants of the signal pulses from their proper positions relative to the beginning of the start [[pulse]]. The magnitude of the distortion is expressed in percent of an ideal unit [[pulse]] length. This is sometimes called ''bias distortion''.

Telegraphic distortion is a similar and older problem, distorting the ratio between [[Mark and space|''mark'' and ''space'']] intervals.<ref>{{Cite web|date=July 1970|title=Telegraphic Type Services Standard Interface Specifications|url=https://www.ridethemindway.com/phones/Disk_1/Bell_Sytstem_Practices_000-000-000_to_500-000-000/312-011-101_I1R.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.ridethemindway.com/phones/Disk_1/Bell_Sytstem_Practices_000-000-000_to_500-000-000/312-011-101_I1R.pdf |archive-date=2022-10-09 |url-status=live|website=The Mindway}}</ref>