A cikin tsarin TV na farko, an yi amfani da oscillator mai sarrafa wutar lantarki sau biyu sau biyu na layin kwance, kuma an rarraba wannan mita ta yawan layin da aka yi amfani da shi (a wannan yanayin 525) don ba da filin filin (60 Hz a wannan yanayin). An kwatanta wannan mita tare da 60 Hz na layin wutar lantarki da kuma duk wani rashin daidaituwa da aka gyara ta hanyar daidaitawa da maɓallin maɓallin maɓallin. Don yin bincike na interlaced, an buƙaci layi na layi na layi a kowane firam don yin nesa na baya na tsaye daidai da filayen da ba daidai ba, wanda ma ma'anar ma'anar oscillator dole ne a raba ta da wani lamari. Tambaya: Yaya yawancin layi ne?
525 na shekara