Fluke 990DSL, Руководство пользователя

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POTS Testing and Fault Location
The POTS Toolbox
4
4-45
VF Loss Test Results
The
Single Tone
VF Loss test measures the insertion loss of the pair at the
detected frequency, and displays the result in the upper right corner of the
screen as shown in Figure 4-27.
The
CopperPro SmartTone
loss test measures the 100-tone composite
frequency set transmitted by another CopperPro tester, and displays a complete
graph of the results. This test, in addition to being much faster than tests which
send and measure one tone at a time, has enough resolution to catch significant
faults (such as a loaded bridge tap) that can easily be missed by N-Tone loss
/slope tests.
acy97s.eps
Figure 4-27. VF Loss Test Results
Press
A
(
Contin. VF Loss
) to view continuous loss results.