| acr- |
Signal Attenuation varies directly with cable length and with the signal frequency. The parameter that the determines the probability of signal reception at the receiver end is signal-to-noise ratio. In the case of structured cabling, this is similar to Attenuation-to-Crosstalk Ratio ( ACR ). The higher the ratio, the higher the probability of good signal reception. The table below shows the ACR requirements to guarantee reliable transmission of various protocols used in local area networks.
출처: www.brandrex.com.au/bptute.htm
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| acr- |
One of the test parameters used when testing Category 5E or Category 6 UTP, FTP or ScTP Permanent Links or channels.ACR is the calculated difference in dB between attenuation and crosstalk measurements. Please note that the ANSI/TIA/EIA-568-B.1 does not specify this test as a certification criteria, whereas the ISO/IEC 11801 Ed.2:2002 does require it. Once again, the higher the value in dB here, the better.
출처: www.interconnect.co.za/links.html
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| acr- |
ACR (attenuation to crosstalk ratio) is the difference between NEXT in dB and attenuation in dB. The ACR value indicates how the amplitude of signals received from a far-end transmitter compare to the amplitude of NEXT produced by near-end transmissions. A high ACR value means that the received signals are much larger than the crosstalk. In terms of NEXT and attenuation values, a high ACR value corresponds to low NEXT and low attenuation.
출처: www.dmccormick.org/NetworkTesting.htm
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| acr- |
An Automatic Circuit Recloser is a circuit breaker incorporating a multishot, autoclosing relay, installed on a medium voltage feeder. They are designed to trip when a fault is detected, then automatically reclose after a set amount of time in an attempt to clear transient faults on the feeder. They can save considerable time when restoring power.
출처: www.nojapower.com.au/glossary/default.htm
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| acr- |
Standardized method for subjective determination of transmission quality. Used for judgements of one sound at a time, typically rated on a scale from one to five.
출처: www.lysator.liu.se/~lunkwill/pum6/webdoc/glossary....
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