Viavi ONX-220, Руководство пользователя

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ONX-220 User's Guide
22135173, Rev. 000 June 2020 193
Chapter 11 Test Results
HL Leakage results
Hl Leakage results screen displays a graph of the leakage
detected and the preset threshold level.
In HL test mode and walking around subscriber premises, the
ONX measures signals off the air looking specifically for the
HL Transmitter’s two leakage signals.
Each HL Tx signal has a special identification modulation
called a “Tag.” When either of these two signals are measured,
the signal level and Tag are displayed.
If the signal’s Tag is detected and its measured level exceeds
the configured squelch level, then the ONX emits an audible
tone and the “Tag” box changes to yellow.
For example, if squelch was set to 5μV/m, the signal level must
exceed 5μV/m and the Tag must be detected (Yes) to turn the
box yellow and to emit an audible tone (mute on).
As you approach the leak, a higher signal level will be
measured. The audio sound, the bar graph, and history chart
are updated to show these level variations.
Equalizing the signal
When equalization is on, the ONX reads a level that compensates for the high levels
injected by the HL transmitter. This reflects levels that would be read assuming expected
service carrier levels.
When off, the ONX reads the uncorrected value of the leak. This level is likely to be high, as
the HL transmitter injects high level tagged signals.
Adjusting the volume and mute
Audio sound volume can be adjusted using the volume bar at the bottom of the screen, or
the Mute button can be enabled to fully mute the audible tone when desired.