An Asterisk Appears at the end of an Autotest - DTX CableAnalyzer | Fluke Networks

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An Asterisk Appears at the end of an Autotest - DTX CableAnalyzer

If the worst case margin falls within the field testers accuracy, it is marked with an asterisk (*).  This is a requirement of ANSI/TIA-1152 and IEC 61935-1.

DTX CableAnalyzer Autotest Result with Asterisk


Let's find out which pair had a NEXT margin of 1.9 dB:

NEXT Margin Screen



To better undestand this, let's draw a graph and put the limit line in as red. Then add the region representing the marginal band, shown in yellow. If the worst case margin should fall into this band, it is marked with an asterisk (*). It is important to understand that the width of the band changes with frequency.

NEXT Loss Accuracy Band  Cat 6A Permanent Link



Let's put our result above for Pair 3,6-4,5 on this graph:

Category 6A Permanent Link NEXT Accuracy Bandwidth Test

It just falls within the accuracy band, hence the * on our test result.

Since accuracy is dependent upon frequency, it is possible to have two results with the same margin, but only one of them reported as marginal.

If you are looking for the specific frequency points of the marginal band, please click on the appropriate link below:
 

 

                 Category 5e Permanent Link

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Category 5e Channel

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Category 6 Permanent Link

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Category 6 Channel

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Category 6A Permanent Link

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Category 6A Channel

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Class F Permanent Link

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Class F Channel


The accuracy bands programmed into the DTX CableAnalyzer are taken from the Independent Verification Testing with Underwriters Laboratories (UL).




Category 5e Permanent Link
You can also download these as a look up table.
 

Insertion Loss Accuracy Band Cat 5e Permanent Link
 
NEXT Loss Accuracy Band Cat 5e Permanent Link
 
PS NEXT Loss Accuracy Band Cat 5e Permanent Link
 
ACR-N Accuracy Band Cat 5e Permanent Link
 
PS ACR-N Accuracy Band Cat 5e Permanent Link
 
Return Loss Accuracy Band Cat 5e Permanent Link
 
ACR-F Accuracy Band Cat 5e Permanent Link
 

PS ACR-F Accuracy Band Cat 5e Permanent Link

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Category 5e Channel
You can also download these as a look up table
 

Insertion Loss Accuracy Band Cat 5e Channel
 
NEXT Loss Accuracy Band Cat 5e Channel
 
PS NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

Back to the top
 
 

Category 6 Permanent Link
You can also download these as a look up table.
 

Insertion Loss Accuracy Band Cat 5e Channel
 
NEXT Loss Accuracy Band Cat 5e Channel
 
NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e Channel
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

Back to the top

 

 
 
Category 6 Channel
You can also download these as a look up table
 

Insertion Loss Accuracy Band Cat 5e Channel
 
 
NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e Channel
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

Back to the top

 

 
 
Category 6A Permanent Link
You can also download these as a look up table
 

Insertion Loss Accuracy Band Cat 5e Channel
 
 
NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e Channel
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

Back to the top

 

 
 
Category 6A Channel
You can also download these as a look up table
 

Insertion Loss Accuracy Band Cat 5e Channel
 
 
NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e Channel
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

Back to the top

 

 
 
Class F Permanent Link
You can also download these as a look up table
 

Insertion Loss Accuracy Band Cat 5e Channel
 
 
NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e Channel
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

Back to the top

 

 
 
Class F Channel
You can also download these as a look up table
 

Insertion Loss Accuracy Band Cat 5e Channel
 
 
NEXT Loss Accuracy Band Cat 5e Channel
 
ACR-N Accuracy Band Cat 5e Channel
 
PS ACR-N Accuracy Band Cat 5e Channel
 
Return Loss Accuracy Band Cat 5e Channel
 
ACR-F Accuracy Band Cat 5e Channel
 
PS ACR-F Accuracy Band Cat 5e Channel

 Back to the top

Author: Sunaina Kandwal

Creation Date: 2014-02-19

Last Modified: 2014-02-19