JDS Uniphase ValidatorPRO-NT, Cu, Руководство пользователя

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Manual Tests
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10.1.1 Cable Test
Cable Tests can be performed with the ValidatorPRO-NT,
Cu remote, the set of 1-8 wiremapping remotes (RJ11/RJ45)
(TP612), the TP312 RJ45 ID-only remotes, or with no
remote. The TP612 remote wiremappers are designed to
report wiremap length and Skew results only. A Link Test
Error message appears “Unable to Measure SNR”. To
measure Signal to Noise Ratio you must use the
ValidatorPRO-NT, Cu remote unit. Testing without a remote
only allows for length to be measured. In order for split pairs
to be correctly identified, the F4 softkey should be used to
select if the cable is Screened or Unshielded Twisted Pair.
The soft function keys available vary based on the type of
remote being used.
Figure 10.3: Manual Data Cable Test Results
Length Constant is used for length measurement and is
adjusted in .1pF increments by pressing the up and down
arrow keys. The displayed cable length is recalculated as the
length constant is changed. This allows an unknown length
constant to be determined by attaching a known length of
cable and running the test. The length constant can be
varied up or down until the displayed length matches the
measured length. The displayed length constant is then the