Fluke DTX-1800, Technical Reference Handbook, Page: 89 / 398

Certifying Twisted Pair Cabling
Twisted Pair Test Settings
3-3
3
Twisted Pair Test Settings
Table 3-1 describes the settings that apply to twisted pair
cabling tests.
To access the settings, turn the rotary switch to SETUP, use
D
to highlight Twisted Pair; then press
H
.
-continued-
Table 3-1. Twisted Pair Test Settings
Setting Description
SETUP > Twisted
Pair > Test Limit Select the appropriate test limit for the job. The Cable Type and Outlet Configuration screens appear if
the current selections are not compatible with the test limit. Selecting Custom lets you create a test
limit. See Chapter 12 for details.
SETUP > Twisted
Pair > Cable Type Select a cable type appropriate for the type you will test. The cable types are organized by type and
manufacturer. Selecting Custom lets you create a cable type. See page 12-1 for details.
SETUP > Twisted
Pair > NVP Nominal velocity of propagation, which is used with the measured propagation delay to determine
cable length. The default value defined by the selected cable type represents the typical NVP for that
cable type. You may enter a different value if necessary. To determine the actual value, change the
NVP until the measured length matches the known length of a cable. Use a cable at least 30 m
(100 ft) long. See page 12-10.
Increasing the NVP increases measured length.
SETUP > Twisted
Pair > Outlet
Configuration The Outlet Configuration setting determines which cable pairs are tested and which pair numbers are
assigned to the pairs. See Figure 3-3. To see the wire map for a configuration, press
J
Sample from the
Outlet Configuration screen. Selecting Custom lets you create a configuration. See page 12-1 for details.
SETUP > Twisted
Pair > HDTDX/
HDTDR PASS*/FAIL Only: The tester shows HDTDX and HDTDR results only for Autotests with PASS*, FAIL*, or
FAIL results.
All AUTOTESTs: The tester shows HDTDX and HDTDR for all Autotests.