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Eye pattern
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=== PAM === The eye pattern of a [[w:Pulse-amplitude_modulation|PAM]] signal should consist of N clearly distinct levels (depending on the PAM order, for example PAM-4 should have four levels and PAM-3 should have three). The overall shape should be symmetric about the horizontal axis and the spacing of all levels should be uniform. [[File:Eye pattern PAM3.png|thumb|upright=1.5|none|Eye pattern of a PAM-3 signal ([[100BASE-T1]] automotive Ethernet)]]
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