Mask the signal set with the unwanted signals.
用不必要的信号屏蔽信号设置。
Electrical noise - essentially any unwanted signal - can arise from a number of sources.
电噪音-本质上是任何无用的信号-可以有各种来源。
In either case, the effects on the measurement can be considerable if enough of the unwanted signal is present.
在这些情况下，如果出现足够强的不希望有的信号，对测量的影响是相当大的。
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