How to calculate the signal-to-noise ratio in a twisted pair with a balanced signal?

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Alexey Smirnov2015-06-07 19:39:16

Electronics

Alexey Smirnov, 2015-06-07 19:39:16

How to calculate the signal-to-noise ratio in a twisted pair with a balanced signal?

There is a measured (from the twisted-pair output) RMS white noise voltage = 80µV.
How to calculate the signal-to-noise ratio when a balanced signal propagates over a twisted pair cable?
PS The signal voltage levels of the balanced signal are described by the RS-485 standard - however, this information can be dispensed with in the calculation.

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