Kendall effect
In telecommunications the Kendall effect is a spurious pattern or other distortion in a facsimile.
It is caused by unwanted modulation products which arise from the transmission of the carrier signal, and appear in the form of a rectified baseband that interferes with the lower sideband of the carrier.
The Kendall effect occurs principally when the single-sideband width is greater than half of the facsimile carrier frequency.
References
This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).
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