bandspread

柯林斯词典

bandspreading /ˈbændˌsprɛdɪŋ/

• 1. N an additional tuning control in some radio receivers whereby a selected narrow band of frequencies can be spread over a wider frequency band, in order to give finer control of tuning 波段展开; 将窄段频率扩展成宽段的收音调频技术

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