44
SCAN-LAN Vt
6.3 Length
The Length test measures the cable length and the distance to a cable fault,
such as a short, open, or impedance change.
The Length test locates significant impedance changes or anomalies in a
cable segment that may be caused by cable damage or inadequate
connections at patch panels, cross-connect blocks, 8-position modular-plug
connectors, or wall plates.
Length is one of the tests run during Autotest and Quick Check. This test
can also be run individually.
The Length test measures length of each pair, locates up to two
intermediate impedance anomalies, and measures propagation delay of
each pair.
NOTE
The accuracy of a Length measurement is dependent on the proper cable
NVP setting. Refer to Chapter 10, Calibration, for the procedure to
calibrate cable NVP.
6.3.1 R
UNNING
L
ENGTH
T
EST
1. Connect one end of the cable under test to the SCAN-LAN Vt.
2. Set dial to LENGTH. The test begins scanning immediately. (Press the
arrow keys to select another cable test standard.)
NOTE
For accurate results, do not use the remote unit when performing a
Length measurement test, except during Autotest or Quick Check.
