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What is the difference between isolation and crosstalk?

问题:

What is the difference between isolation and crosstalk?

答案:

Channel crosstalk is interference caused by an unwanted signal from one channel being either coupled (typically capacitively coupled) or radiated into another channel. Crosstalk is typically measured in dB down (from the signal level in the interfering channel) at a specified frequency with a specified load on the interfered-with channel.

Isolation is a measure of channel resistance to leakage from one part of a circuit to another, such as through a supposedly open solid-state switch or as resistively coupled crosstalk. Isolation is often specified in Ohms. Crosstalk and isolation are often given as a bank and channel specification on relay scanning cards. Differential- and common-mode isolation specifications are also included with many relay scanning cards.


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