LANcat
User Manual
Page 5-26
ACR
Attenuation-to-Crosstalk Ratio (ACR) is the difference between
crosstalk and attenuation, measured in dB, at a given frequency.
ACR is computed based upon the measured values of attenuation
and NEXT.
A positive ACR is necessary to assure that a signal at the receiving
end of a channel is stronger than the crosstalk interference imposed
from adjacent wire pairs. ACR is therefore an indication of the
expected reliability of data transmissions.
ACR is automatically computed during Autotest and Quick Check
when testing twisted pair cable. It can also be run individually as
an Extended Function test.
RUNNING ACR INDIVIDUALLY
1.
Set dial to EXTENDED FUNCTIONS.
2.
Press the arrow keys to highlight ACR.
3.
Press ENTER. The test begins scanning immediately.
(Press the arrow keys to select another cable test standard.)
F1
F2
F3
F4
Selecting ACR
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