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Power Sum Attenuation to Crosstalk Ratio (PSACR)
Power Sum Attenuation to Crosstalk Ratio (PSACR) is actually
a calculation, not a measurement. PSACR is derived from an algebraic
summation of the individual ACR effects There are four PSACR
results at each end of the link per link tested.
Results Interpretation
Since PSACR is a measure signal to noise ratio, a larger number
(more signal and less noise) is more desirable than a smaller
number (more noise and less signal). Typically PSACR results
are around 3 dB lower than the worst-case ACR result at each
end of the link.
Troubleshooting Recommendations
Since PSACR is a calculation based on ACR measurements, troubleshooting
for PSACR failures is really troubleshooting for ACR problems.
As mentioned earlier, troubleshooting for ACR becomes troubleshooting
for NEXT and attenuation. Once you have isolated and repaired
the ACR problem, the PSACR will automatically improve.
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