Test-Um VALIDATOR-NT NT955 User Manual

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Test-Um NT955 Series

Manual Tests performs individual tests on 

Data, Phone, or 2-wire cables 

based on defined test standards.  The tests that can be performed for 

each selected cable type are listed on the Manual Test screen for that 

type (Figure 5.2).   
5.1. Data Cables

Data Cables are defined as cables wired to T568A/B pin numbering and 

pairing.  Validator-NT will perform full Signal to Noise Ratio and Skew 

testing as part of the cable test.  Speed testing is done with the Bit Error 

Rate Test (BERT). You can also send tone over the cable, check length, 

flash a hub or do a Speed Test with BERT.  
Note:  The TP610 Remote Wiremappers are designed to report wiremap 

length and Skew results only.  A Link Test Error message appears 

“Unable to Measure SNR.”  To measure Signal to Noise Ratio you must 

use the Validator Smart Remote unit.
Length Constant is used for length measurement and is adjusted in 

.1pF increments by pressing the up and down arrow keys.  The displayed 

cable length is recalculated as the length constant is changed.  This 

allows an unknown length constant to be determined by attaching a 

known length of cable and running the test.  The length constant can 

be varied up or down until the displayed length matches the measured 

length.  The displayed length constant is then the correct value for that 

cable. This same adjustment feature is on both the Phone and 2-Wire 

test screens. (Figure 5.1)

Cable Type  

 

 

CAT3   

 

 

19.0 

 

62.5

CAT5/CAT5E/CAT6 

 

15.0 

 

49.0

 

RG58   

 

 

27.5 

 

90.0

 

RG6, RG11, RG59 

 

16.25   

53.0

 

22AWG, Jacketed 

 

24.0 

 

78.5

 

22AWG, Unjacketed 

 

14.0 

 

46.0

 

20AWG, Unjacketed 

 

16.0 

 

52.5

 

18AWG, Unjacketed 

 

17.0 

 

55.5

Figure 5.1 Typical Cable Length Parameter

Validator

TM

 Running Manual Tests

Validator

TM

 Running Manual Tests