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EXFO VDSL2 User Manual

Page 35

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Auto CQ/Video-DSL Rate Prediction

Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set

27

Configuring CQ Auto Tests

³

Isolation measures the quality of insulation or sheathing for the copper
pairs.

³

Load Coil Detection detects the presence of load coils in the line.
Toggle between Enable and Disable.

³

Power Influence measures the effects that 50 Hz and 60 Hz powerline
(AC Mains) interference has on the circuit under test. Toggle between
Enable and Disable.

³

VF Longitudinal Balance is very useful in identifying loops that will
suffer from crosstalk. Toggle between Enable and Disable.

³

VF Noise measures VF noise in the line. Toggle between Enable and
Disable.

³

VF Impulse Noise measures the random occurrences of energy spikes
in the voice frequency range that have random amplitude and spectral
content.

To select tests:
1.
Press the up/down arrow keys to highlight a desired test.

2. Press

to toggle between Enable and Disable.

3. Select other tests as required.

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