EXFO MaxTester 635 - Manual (Page 153)

Noise Tests
Copper and VDSL2/ADSL2+ Multi-play Test Set 145
Power Influence
Power Influence
The Power Influence test allows you to view the effects of interference
from a 50 Hz or 60 Hz power source (AC mains) on the circuit under test.
The results of the power influence test are also in graphical form.
Detection
The Detection function displays and updates results in
real time, until you stop the test. The last valid results
then remain displayed.

Current Group is the current test group name, for
example Noise.

Current Test displays the test being measured.
Here you can switch to another test from the given
list. However, this action will terminate the
ongoing measurement test.

VF Noise Filter allows you to define the voice
frequency noise filter to be used, dependent on
ITU or ANSI Standard mode and Noise Filter set in Setup/Application
Settings.

Power Line Frequency is a read-only value of 50 or 60 Hz based on
frequency selected in Setup/Application Settings/Standard.

Threshold Settings button opens a new page that allows you to set the
power influence thresholds.

Select Graph button changes to Graph Selected when pressed and
opens a new selection of function keys which allow you to maneuver
the graph as follows:

Cursor - press the left/right arrow keys to decrease/increase the
values by moving the cursor. Press and hold the left/right arrow
keys to accelerate the cursor. Press
to recall the cursor and
place it in the middle of the current x-axis limits.