Chapter 2
Test Setup Procedures
OTHER OPERATIONS
CHANGING DEFAULT NVP VALUE OF A CABLE
1.
From the Test Standard screen, select
to change the NVP. The NVP screen
will appear.
Figure 2-21: NVP Screen
2.
Use the ALPHA/NUMERIC keys to manually enter one or more NVP value(s).
3.
To automatically calculate a new NVP value, select
. The Measure NVP
screen appears.
4.
Connect a test cable of known length.
5.
Using the ARROW and NUMERIC keys, enter the known cable length.
6.
Select
to calculate a new NVP value. The display returns to the main NVP
screen after the new NVP value has been calculated.
Note: This is a channel measurement. Include the length of both patchcords when
entering the cable length information.
CHANGING THE DEFAULT REFERENCE TEMPERATURE (T
REF
) VALUE
This function is typically used in very warm environments where cable performance
degrades as temperature rises. Input the maximum expected temperature that the
cable will be exposed to and the attenuation limits will changes accordingly. This
ensures that the network will operate properly even in extreme heat. Be aware that
the longer links may fail the autotest since the attenuation limits are more strict as
higher temperature values are entered into the T
REF
function.
1.
From the Test Standard screen, select
to change the Reference
Temperature. The Reference Temperature screen will appear.
2.
Use the ALPHA/NUMERIC keys to manually enter a new Reference Temperature
Value.
3.
Press ENTER to accept the new Reference Temperature.
2-16
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