Since a relatively narrow bandwidth is involved, it is also likely that ac excitation also offers greater immunity to rf interference than dc excitation.
因为包含相对地狭窄的带宽，并且是可能的交流励磁为射频干涉并且提供比较伟大的安全性直流励磁。
RF (or microwave) signals have switching considerations that differ from those for DC or low frequency AC signals.
射频（或微波）信号的切换不同于直流（DC）或低频交流（AC）信号。
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