Lub buzzer muaj nuj nqi yog ib qho haujlwm ntxiv ntawm cov digital multimeter. Nws yog feem ntau siv nyob rau hauv 2KΩ ntau. Feem ntau, thaum txoj kab (los yog tsis kam) nrog tus nqi tsis kam ntawm 50Ω lossis tsawg dua yog ntsuas, lub suab nrov nrov. Hauv kev xyaum, qhov kev ua haujlwm no muaj txiaj ntsig zoo heev, nws tuaj yeem txhim kho kev ua haujlwm ntawm kev ntsuas qhov hluav taws xob ntawm qhov hluav taws xob, thiab nws yog ib qho tseem ceeb ntawm cov twj paj nruag thiab cov ntsuas hluav taws xob.
