What does UTP cable rely on to reduce signal degradation caused by EMI and RFI?

非遮蔽双绞线是靠什么减少讯号下降造成的电磁干扰和射频干扰?。

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All optical 3r regeneration is an effective method to overcome the optical signal degradation in the long haul transmission systems.

全光3r再生是克服超长距离传输中光信号恶化的一种有效的方法。

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For certain signal types, such as low level or high frequency, the analog backplane should not be used to avoid possible signal degradation.

对于特定的信号类型，例如低电平或高频率，则不宜使用模拟背板，以避免造成信号劣化。

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In essence, Apple cops to the fact there are reception issues with the new iPhone namely, that if you cover the bottom-left corner of the phone and bridge the gap between the notch there with your naked flesh, you could see some signal degradation.

FORBES: Please Remember To Hold Your New iPhone Correctly