It indicates to the operator, depending on the set control type, the bar graph either the receive level or the control voltage of a radio.
Sibonisa kumqhagamshelanisi, ngokuxhomekeke kwindlela olulungiselelwe ngayo ulawulo, ibhagrafu okanye umgangatho wolwamkelo okanye amandla ombane wokulawula unomathotholo.