automatic volume control system造句

AM Radios incorpoarte and automatic volume control system ( AVC ) ( the more correct term is automatic gain control ) so you don't notice the change as tune form one station to another, move around, go under power lines etc etc . My guess is that there is a bad solder joint in an area affecting the AVC . When the radio passes under the power lines perhaps the change in signal causes a sufficient change in voltage in the AVC circuit to overcome the oxide layer in the faulty solder joint.
It's difficult to find automatic volume control system in a sentence. 用automatic volume control system造句挺难的