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Test-Um NT955 Series
4.4. Custom Cable Denitions
The Custom Cable Denitions screen shows all dened cable types
loaded into the Validator-NT from the current job and what category
of test is performed on each type. The soft keys, F1 thru F3, allow for
adding, editing, and deleting cable information. (Figure 4.10)
The recommended procedure is to create Custom Cable Denitions in
Plan-Um and upload them to Validator-NT. However, by following the
steps outlined below you can also create Custom Cable Denitions and
Save them directly in your Validator-NT.
Custom Cable Types will only be saved to the current job unless you
create a Template File to store and retrieve this information.
1. Select Auto Test from the Start screen. Select Custom Cable
Denitions.
2. Modify a default cable type or select New using the soft keys.
Select Cable Type: Data, Phone, or 2-wire.
3. To create a New Custom Cable Denition, use the alphanumeric
keypad to enter the information into each eld. Press Accept
when you are nished entering data into each eld and to
advance to the next eld. You may also use the arrow keys on
your keypad to navigate between elds. Backspace and Delete
soft keys are provided to facilitate editing of information.
4. To edit an existing cable denition, use the alphanumeric keypad
to modify the test parameters in each eld. Press Accept or use
the arrow keys to advance to the next eld.
5. Length constant is used to calculate length measurements and
may be adjusted for custom cable types depending upon their
capacitance rating. Figure 5.1 displays typical cable length
parameters.
6. Typical settings for custom cable types will include a Minimum
SNR of 20 dB and Maximum SKEW of 35 nanoseconds on
Ethernet cable rated for gigabit speed.
7. Wire Mapping, Pair Polarities, and Split Test selections are
available using the drop down menus.
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How AutoTest Works