Part Number: VCA821


vca821动态范围不是>40db吗,为什么手册里给出的图表最小只有0db,不应该是-20db? 还有就是我实际测试,最大增益设置为20db,输入50Mhz,-20dbm时,vca821最大输出可以到0dbm左右,最小可以到-60dbm左右,动态范围有60db,这是为什么呢?
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