Test-Um NT955 Data Cables, Cable Type, pF/ft, pF/m, Coaxial Cable, Security Wire

Test-Um NT955 Series ValidatorTM Running Manual Tests

5. Running Manual Tests

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	pF/ft.	pF/m
Data Cable
CAT3	19.0	62.5
CAT5/CAT5E/CAT6	15.0	49.0
Coaxial Cable
RG58	27.5	90.0
RG6, RG11, RG59	16.25	53.0
Security Wire
22AWG, Jacketed	24.0	78.5
22AWG, Unjacketed	14.0	46.0
20AWG, Unjacketed

16.052.5

18AWG, Unjacketed 17.0 55.5

Figure 5.1 Typical Cable Length Parameter

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