Kalmar "local oscillator" yawanci tana nufin da'ira na lantarki da ake amfani da shi a tsarin sadarwa, kamar rediyo, talabijin, da radar, don samar da tsayayyen sigina a takamaiman mitar da ake amfani da ita don haɗawa da sigina mai shigowa don samar da sigina na tsaka-tsaki (IF) don ƙarin aiki.Gaba ɗaya, oscillator na gida shine janareta na sigina wanda ke samar da siginar sinusoidal a daidai mitar, wanda yawanci ana iya daidaitawa ko daidaitawa. A cikin masu karɓar rediyo da talabijin, alal misali, oscillator na gida yana haifar da sigina wanda ke gauraye da siginar mitar rediyo mai shigowa (RF) don samar da sigina na tsaka-tsaki (IF) wanda ya fi sauƙi don ƙarawa da raguwa. A cikin tsarin radar, oscillator na gida yana haifar da sigina wanda ke gauraye da siginar RF da aka watsa don samar da sigina a wani mitar daban wanda za'a iya amfani dashi don gano maƙasudi.Gaba ɗaya, oscillator na gida shine muhimmin sashi a yawancin tsarin sadarwa na lantarki, samar da tsayayyen sigina mai inganci wanda ake amfani da shi don sarrafa sigina masu shigowa.