摘 要： 介紹了HSP50214B數(shù)字下變頻" title="下變頻">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器" title="下變頻器">下變頻器的工作原理、功能和結構，在此基礎上設計了一種數(shù)字解調模塊，并就HSP50214B在其中的應用和配置作了詳細的分析，最后給出了該數(shù)字解調模塊在數(shù)字監(jiān)測接收系統(tǒng)中的應用。實驗證明，該模塊在無線電接收系統(tǒng)中有著很強的實用性。
關鍵詞： 解調 數(shù)字下變頻 HSP50214B
在數(shù)字式接收系統(tǒng)中，A/D轉換器的采樣頻率" title="采樣頻率">采樣頻率一般都在中頻以上，因此采樣速率較高。在此采樣頻率上，僅僅靠 DSP難以完成實時接收、存儲、解調與分離等任務。當前廣泛采用的方法是直接使用硬件完成數(shù)字下變頻，即用數(shù)字下變頻器將高速數(shù)據(jù)流變成當前DSP可實時處理的中低速數(shù)據(jù)流?；谶@種思想，設計了一種基于下變頻器的數(shù)字解調模塊。該模塊采用數(shù)字下變頻器HSP50214B進行下變頻，經過抽取、濾波、降低數(shù)據(jù)率，將下變頻后的數(shù)據(jù)送至TMS320C5409 DSP，完成數(shù)字解調功能。此方案結構簡單、處理方式靈活，非常適用于載波頻率、符號速率和調制樣式可變的無線電接收系統(tǒng)。
1 HSP50214B簡介
1.1 HSP50214B的功能描述
HSP50214B是Harris(1999年8月后更名為Intersil)公司推出的成熟和典型的數(shù)字下變頻器，能將中頻采樣信號轉換為基帶采樣信號，其功能包括：頻率變換、抽取、濾波整形。其中，頻率變換功能由正交混頻器完成，抽取和濾波功能則由CIC抽取濾波器" title="抽取濾波器">抽取濾波器、HB抽取濾波器、255階FIR抽取濾波器、HB內插(Interpolation)濾波器等級聯(lián)" title="級聯(lián)">級聯(lián)完成。除了上述功能外，HSO50214B還能完成自動增益控制、片內和片間的同步控制、載波和碼元跟蹤以及部分常規(guī)信號的解調等功能。該芯片可以直接和DSP相連，傳遞控制信號、狀態(tài)信息及基帶數(shù)據(jù)。
1.2 HSP50214B的結構與原理
HSP50214B由同步電路、輸入模塊、輸入電平檢測、變頻模塊(正交混頻與數(shù)控振蕩器)、CIC(Cascaded Integrator Comb)抽取濾波器、HB(Half Band)抽取濾波器、255階可編程FIR濾波器、自動增益控制器(AGC)、重采樣與HB內插濾波器、定時數(shù)控振蕩器、笛卡兒坐標與極坐標變換器、鑒頻(幅)模塊和輸出模塊等十三個功能模塊組成，功能框圖如圖1所示。
量化后的數(shù)字中頻信號進入下變頻器后，經過兩個乘法器和復正弦信號產生器產生的正交正弦信號相乘。相乘結果作為I、Q兩路信號，此時采樣頻率fs并沒有發(fā)生改變。兩路信號分別經一組級聯(lián)的低通濾波器濾波并完成抽取后變?yōu)榛鶐盘?，這就是下變頻抽取過程。此時，信號采樣率變?yōu)閒s/M，其中M為級聯(lián)的抽取因子。整個下變頻器的核心部件為級聯(lián)的抽取濾波器，在HSP50214B中它是可編程的。
1.3 HSP50214B的主要特性
HSP50214B具有14位的輸入分辨率和16位的輸出分辨率，前端處理速度CLKIN達到65MS/s，后端處理速度PROCLK達到55MS/s；32位的可編程載頻數(shù)控振蕩器可用于信道分選、載波跟蹤及符號跟蹤；總抽取率達4～16384，由于有了重采樣級，抽取因子可以是非整數(shù)；輸出低通帶寬982kHz時，輸出采樣率可達12.94MＳ/s；具有串行、并行和FIFO等多種16位輸出模式；笛卡兒坐標(I、Q)到極坐標(
，arctan(Q/I))變換和鑒頻(幅)等可用于AM、CW、FM、SSB、FSK、PSK等信號的解調。
2 基于HSP50214B的數(shù)字解調模塊的設計
2.1 數(shù)字解調模塊的原理框圖及工作原理
數(shù)字解調模塊原理框圖如圖2所示。該模塊采用TI公司的TMS320C5409 DSP芯片作為處理器，充分利用HSP50214B的靈活配置功能，結合外圍電路構成DSP應用系統(tǒng)。
模擬中頻信號經A/D轉換器采樣(采樣頻率可編程，最高采樣速率達65MHz，12bit)后送入HSP50214B進行混頻、濾波、抽取整形等處理。對于AM、CW、FM信號，可以直接通過HSP50214B片內鑒幅、鑒相模塊進行解調，再通過串口輸出至D/A轉換器，得到語音輸出；對于其他調制信號，如SSB、FSK、PSK、QPSK等，HSP50214B將下變頻后的I、Q基帶信號通過并口送入BI-FIFO(2KB)，然后DSP通過FIFO中斷方式將數(shù)據(jù)從BI-FIFO讀入，進行解調處理。數(shù)字解調模塊通過PCI總線與主機進行通信，傳輸解調結果和控制命令等。
2.2 HSP50214B的接口設計及配置
HSP50214B共有256個32位的寄存器。DSP通過HSP50214B的微處理器接口(u口)對內部寄存器參數(shù)進行設置。HSP50214B與TMS320C5409 DSP的接口電路如圖3所示。
DSP采用間接尋址的方式通過數(shù)據(jù)總線C[7:0]，設置HSP50214B的256個寄存器參數(shù)。在寫入過程中，寄存器的參數(shù)為32位，而數(shù)據(jù)總線只有8位，在寫入32位數(shù)據(jù)時，需將數(shù)據(jù)通過C[7:0] ，按照字節(jié)的高低順序，分四次寫入到四個8位保持寄存器中。在進行寄存器參數(shù)設置時，不但要給定參數(shù)還要指定寄存器地址(1～256)，該地址緊跟著參數(shù)被寫入到一個8位的寄存器中。A[2:0]決定數(shù)據(jù)總線C[7:0]數(shù)據(jù)寫入的地址(000－保持寄存器1，001－保持寄存器2，010－保持寄存器3，011－保持寄存器4，100－地址寄存器)。
在寫入寄存器地址時，觸發(fā)電路產生脈沖和同步時鐘來裝載寄存器的參數(shù)。圖4給出了裝載寄存器數(shù)據(jù)的時序。C[7:0]中的數(shù)據(jù)和A[2:0]中映射的地址在
的上升沿寫入PDC，并且鎖存至寄存器中，此時A[2:0] =100。值得注意的是，在寫完一個控制字后，必須等待四個處理時鐘才可以寫下一個控制字，以保證上一個控制字的正確傳輸。
該數(shù)字解調模塊可以對不同中頻輸出信號在接收前端實現(xiàn)解調分析功能。應用中可根據(jù)實際的需求，設置各寄存器的參數(shù)，包括CIC、AGC、串并口、輸出格式、濾波器的系數(shù)等。模塊上電時，DSP在進行初始化的過程中將各寄存器的參數(shù)設置到HSP50214B的目的寄存器中。該數(shù)字解調模塊可以實現(xiàn)前端高速采樣、靈活的下變頻設置和DSP的軟解調功能，可以對不同調制方式實現(xiàn)靈活解調分析，具有適應性強、軟件升級方便等特點。
由于HSP50214B配置的靈活性和DSP良好的可編程性，該解調模塊可以通過編程實現(xiàn)各種調制信號的解調分析，實驗驗證了該模塊可以適用于不同的無線接收系統(tǒng)。
3 數(shù)字解調模塊在數(shù)字監(jiān)測接收系統(tǒng)中的應用
數(shù)字監(jiān)測接收系統(tǒng)主要完成指定波段內廣播信號和電臺信號的快速搜索和監(jiān)測功能，以便及時發(fā)現(xiàn)非法廣播信號和電臺信號，為實施干擾提供情報支援。
系統(tǒng)主要由接收天線、寬帶射頻接收、寬帶數(shù)據(jù)采集卡、窄帶射頻接收、窄帶解調處理和PC終端處理顯示等六部分組成。寬帶射頻接收部分通過對指定波段的掃描，實現(xiàn)全景接收；窄帶射頻接收部分和窄帶解調處理部分根據(jù)終端下達的指令，完成指定頻點的監(jiān)測分析和解調功能；PC終端處理顯示部分完成數(shù)據(jù)的終端處理、顯示和存儲管理等。寬帶射頻接收模塊輸出10.7MHz的中頻信號，瞬時帶寬1MHz；窄帶射頻接收模塊輸出1.4MHz的中頻信號。窄帶解調處理模塊是文中所述的基于HSP50214B和TMS320C5409 DSP的解調模塊，在窄帶分析處理中承擔著數(shù)字下變頻和完成解調功能的任務。系統(tǒng)功能組成框圖如圖5所示。
解調處理模塊對窄帶接收的中頻信號進行采集處理，并將解調分析后的數(shù)據(jù)通過PCI總線傳送至PC終端進行顯示、管理(頻譜、調制樣式、帶寬、調制度、電平等)。對于AM、CW、FM信號，可通過其串口輸出解調后的話音信息。
現(xiàn)以在短波波段接收的調幅信號分析為例，給出解調模塊中HSP50214B的配置和解調分析結果。
HSP50214B配置的主要參數(shù)：采樣頻率為64MHz/16＝4MHz，載波數(shù)控振蕩器N=(1.4/4)×232、相位偏移＝ 0，CIC抽取因子D=16、Gain=5，半帶濾波HB1和HB3打開、抽取因子為2×2＝4，F(xiàn)IR抽頭數(shù)為50，低通濾波帶寬為8kHz，抽取因子為1，插值半帶濾波旁通。輸出的速率為4MHz/16/4=62.5kHz。串口輸出信號的幅度，D/A轉換后輸出語音信號；并口輸出下變頻后的I、Q兩路數(shù)據(jù)至DSP進行頻譜分析并將結果向上傳送。圖6所示為一個AM信號分析結果，包括調幅度、帶寬、調制樣式、頻譜瀑布圖顯示等。
數(shù)字下變頻器在數(shù)字信號處理中有著重要的地位，它在軟件無線電、蜂窩基站以及CDMA中應用廣泛。HSP50214B提供了靈活的可編程特性，利用它可以方便地設計出能夠實時處理多種通信信號的接收機。本文設計的基于HSP50214B的數(shù)字解調模塊正是利用此特性，配合DSP，可以靈活解調各種調制方式的通信信號，適用性強?？梢灶A見，隨著軟件無線電和各種用途的電子信息接收系統(tǒng)的發(fā)展，其應用前景非常廣闊。
參考文獻
1 HSP50214B Data Sheet [Z](File Number 4450.3).Harris公司，May 2000
2 Calculating Maximum Processing Rates of the PDC(HSP50214，HSP50214A，HSP50214B)[Z].Application Note(AN9720.2). Harris公司，January 1999
3 鄒理和. 數(shù)字信號處理 [M].北京：國防工業(yè)出版社，1985
4 趙義正. HSP50214B在數(shù)字解調系統(tǒng)中的應用[J]. 重慶郵電學院學報，2002;(1)