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Chapter 2: Certify Twisted Pair Cabling
Settings for Twisted Pair Tests
39
Or to set up a new twisted pair test, tap
NEW TEST
. If no module
is installed, the
MODULE
screen shows. Tap the correct copper
module.
3
On the
TEST SETUP
screen, tap the panels to change settings
for the test. See Table 2.
4
On the
TEST SETUP
screen, tap
SAVE
when your test setup is
completed.
5
On the
CHANGE TEST
screen, make sure the button next to
the test is selected, then tap
USE SELECTED
.
Table 2. Settings for Twisted Pair Tests
Setting Description
Module
Select
DSX-5000 CableAnalyzer
.
Cable Type
Select a cable type that is correct for the type you will
test. To see a different group of cable types, tap
MORE
,
then tap a group. To make a custom cable type, tap
Custom
in the
Cable Groups
list.
NVP

Nominal velocity of propagation. The tester uses the NVP
and the propagation delay to calculate the length of the
cable.
The default value is defined by the selected cable type
and is the typical NVP for that cable type. To enter a
different value, tap the
NVP
panel, then tap or
on the
NVP
screen to increase or decrease the value.
To find the actual value for a cable, connect a known
length of the cable to the tester, tap
MEASURE
on the
NVP
screen, then change the NVP until the measured
length matches the known length. Use a cable at least
30 m (100 ft) long.
When you increase the NVP value, the calculated length
increases.
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