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Autotest Results for Twisted Pair Cable
3
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Table 3-6. Items on the ACR Results Screen
Item Description
NEXT Pairs
The pairs that produced the crosstalk value used in calculating the ACR result.
Atten. Pair
The pair that produced the attenuation value used in calculating the ACR result.
Result
The overall result for the ACR test. A PASS result means that the calculated ACR
is higher than the value specified for the selected test standard. A FAIL result
means that the calculated ACR is lower than the specified value.
ACR (dB)
The worst-case ACR. Worst-case ACR is the calculated ACR value that is closest
to exceeding specifications. If the ACR exceeded specifications, the value
displayed is the ACR value that exceeded specifications by the greatest amount.
Frequency
The frequency where the worst-case ACR value is calculated.
Limit
The specified limit for the ACR at the worst-case frequency. The limit is defined by
the test standard selected.
Margin
The difference between the worst-case ACR and the limit. A positive number
means that the worst-case ACR is higher than the limit. A negative number means
that the worst-case ACR is lower than the limit.