The principle used in most encoders (linear or rotational) is the same: an optical device. We shall study two types of rotational encoders briefly. Figure 3.12 shows an incremental encoder.
Amy McDougall/Barone (Monica Horan) becomes Robert Barone's second wife (in season 7), and is the best friend of Debra, who introduces her to Robert. A recurring character for the first seven seasons of the series, Amy became essentially a regular cast member for the remainder of the show's run.
On Monday night, cast members Charlotte Rae, Mindy Cohn, Lisa Whelchel and Nancy McKeon, who played Mrs. Edna Garrett, Natalie Green, Blair Warner and Jo Polniazcek, respectively, reunited at PaleyFest to discuss their show and how it affected fans, according to Entertainment Weekly.