EXFO VDSL2 User Manual
Page 35
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.